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Home My WebLink About20001285.tiff FORM 920(68-93) PETITION FOR ABATEMENT OR REFUND OF TAXES - G' Must be filed In duplicate and all questions must be answered. %'a --61-o; Petitioners: Complete this side only. Englewood , Colorado, December 17 , 19 99 City or Town lb The Honorable Board of Commissioners of We 1 d County Gentlemen: The petition of Prima Oil & Gas Company _ whose mailing address is: c/o Logan & Firmine, Inc. 333 W. Hampden Ave. , #740 ___ Englewood Colorado 80110 City or Town State Lp Code SCHEDULE NUMBER DESCRIPTION OF PROPERTY AS LISTED ON TAX ROLL See attached schedules. t respectfully requests that the taxes assessed against the above property for the years A.D. 19 97 , 19_, are erroneous, illegal, or due to error in valuation for the following reasons: Describe specifically the circumstances surrounding the incorrect value or tax, including owner's estimate of value. (Attach additional sheets if necessary) The 1997 returns for Prima Oil & Gas Company did not take the correct allowable deductions. 19 97 19 Assessed Value Tax Value Tax Orig. 13,796,760 1 ,129,540.14 Abate. 1 ,382,900 113,048.30 Bal. 12,413,860 1 ,016,491.84 Therefore the petitioner requests that the taxes may be abated or refunded in the sum of $113,048.30 I declare, under penalty of perjury in the second degree that this petition, together with any accompanying exhibits or statements, has been examined by me and to the best of my knowledge, information and belief is true, correct and complete. c/o Logan & Firmine, Inc. 333 W. Hampden Ave. , #740 Englewood, CO 80110-2337 Prima Oil & Gas Company Address Petitioner By /S a7t— /.L/9'/Daytime phone number 303-761-8260 Nem Every petition for abatement or refund filed pursuant to section 39-10-114 shall be acted upon pursuant to the provisions of this section by the board of county commissioners or the assessor, as appropriate, within six months of the date of filing such petition. 39-1-113(1.7), C.R.S. CCU : A'.sse ftef- 4 • 2000-1285 Complete Either Section I or Section II RESOLUTION OF COUNTY COMMISSIONERS Section 1: In accordance with 39-1-113(1.5) C.R.S., the commissioners of County authorize the assessor to review petitions for abatement or refund and to settle by written mutual agreement any such petition for abatement or refund in an amount of one thousand dollars or less per tract, parcel, or lot of land or per schedule of personal property. County Commission Resolution # The assessor and petitioner mutually agree to an assessed value of $ for $ total tax for the year(s) 19 and an abatement/refund of $ _ Petitioner's Signature Data Assessor's Signature Date If Section I is not complete and/or if petition is for more than $1,000, Section II must be completed. Section II: Assessors's recommendation: approved;❑ approved in part $ ❑ denied for the following reason(s) X ceJ on )?& m ncJ.9- oiS mom 7/ie D NT P.v o9/<<i/rg-, 7i e A i > .9c.k itfieiv≤ K 4-Na ,tkw Tthr' 1P7n See//ed, 4 - oiL {r4.4>t,JeS 1.4-sed ern- Vie se- IDeLonThena'•4 hts :; / &on-- [�.P.11,d eel �-T � A$is+7 .� le preyed, 6c/cu/*Tr? s ArE- )/9-se dAttn irl ;>D / e /a/ile/ivr /ti /ei9 9 4-7— � e_ U/e//ife . alcis • s WHEREAS, The County Commissioners of Weld County, State of Colorado, at a duly and lawfully called regular meeting held on the 22nd day of May , A.D. )19 2000 , at which meeting there were present the following members: Chair Barbara J. Kirkmeyer. and Commissioners M J. Geile George E. Baxter. DaJe K. Hall. and Glenn Vaad notice of such meeting and an opportunity to be present having been given to the taxpayer and the Assessor of said County and said Assessor represented by M'me eel Sampson and taxpayer Gomm Oil & Gas Gom y represented by Logan & Firm,na, Tn.,- being present; and (name) WHEREAS, The said County Commissioners have carefully considered the within application, and are fully advised in relation thereto, NOW BE IT RESOLVED, That the Board c on ea not concur) with the recommendation of con the assessor and the petition be approved , and an abatement refund be i10 ee wr ud(bt se a o ed) (approved or denied) on an assessed valuation of $ 1,382,900 for $113.414.A1-1 48..30 total tax for the year(s) 1991_. 1 �airman of Board of Cou y Commissio sSTATE OF COLORADO, ss. County of Weld ) I, Donald D. Warden. , Goutrtyxeleskxanclawiefifficia Clerk of the Board of County Commissioners in and for the County of Weld State of Colorado, do hereby certify that the above and foregoing order is truly copied from the records of the proceedings of the Board of County Commissioners for said Weld County, now in my office. , / IN WITNESS WHEREO ' ' - et my hand and affixed the seal of said County, at Greeley , this pia ,T, , A.D.A9 ?no . L ,--il� • tt0atyaerkto the Board -`�.. _ By 1�.�1 , ' Deputy lerk to the Board ACTION OF THE PROPERTY TAX ADMINISTRATOR Denver, Colorado, Y itir 6-9 the action of the Board of County Commissioners, relative to t e within petition, is hereby CDapprov d;❑ approved in part $ ❑ de ed for the following reason(s) Secretary f° a .` PRIMA OIL 8 GAS COMPANY PETITION FOR REFUND OF TAXES-1997 TAXES(1996 PRODUCTION YEAR) Original Assessed Direct Assessed Value Production Abate.I Refund Abate.!Refund Balance Operating Return on Return of Total Allowable Exempt Royalty Assessment of Allowable Production Tall Schedule No. Well Name County Value Original Tax Assessed Value Tax Assessed Value Balance Tax Expenses Investment(ROI)Investment(Rofl)Deduction 95%Limitation Deductions Percentage Ratio Deduction Tax Refund District Tax Rate 0025340] ALLISON 24-IRL WeB 21870 91084 4,190 32)]8 17,680 1383.00 4,792 0 0 4.792 23.]45 4,792 0.000000°6 0.8750 4190 327.78 102 0.078228 00172690 ALLISON 24-2RC Weld 27.620 2160.66 8,260 646.16 19,360 1,514.50 9,438 0 0 9438 29,987 9,438 0.003000% 0.8750 8260 646.16 102 0.078228 04363885 ALLISON 24-3 Weld 15460 1209.40 3,460 270.67 12000 938.73 3951 0 0 3,951 16.785 3,951 0.00'050% 08750 3460 270.67 102 0076228 00196090 4 AMEN#1 Weld • _ 37,810 3027.56 4,510 361.13 33,309 2,666.43 3,740 103 1,313 5,156 41,051 5,156 0.000000% 0.8750 4510 361.13 520 0.080073 00091495 AMIGO 17-12 Weld 45160 3498.32 6,280 48648 38.880 3,011,84 4,074 1,499 1.599 7.172 49,031 7,172 0.000000% 0.8750 6280 486.48 220 00]7465 00091595 AMIGO 17-24 weld 49,750 3853.88 6.180 47873 43,570 3,375.15 37]] 1,588 1694 7,060 54,014 7,060 0,000000% 08750 6180 47873 220 0.077465 01151797 ANDERSON 4-44 Weld 54,480' 4744.44 780 67.93 53,700 4,676.51 730 85 81 896 59150 896 000000% 0.8750 780 67.93 604 0.087086 00063691 API 24-1 RC Wed 208,420 1630428 5.280 413.04 203.140 15891.24 6,038 0 0 6,038 226.285 6,038 0,000000% 08750 5280 413.04 102 0078228 00172793 API 24-22 RC Weld 40.840 3194,84 4,960 38801 35,880 2,806.83 4,711 419 537 5666 44341 5666 0.040000°/. 0.8750 4960 388.01 102 0.078228 01077197 API 24-24 Weld 29,990 2346.06 2,350 18304 27.640 2,162.22 1,179 771 731 2,681 32,561 2.681 000000]% 0.8750 2350 183.84 102 0.078228 01087897 API 24-34 Wed 12]260 9955.30 2050 100.37 125,210 9.794.93 1,276 550 521 2.347 138,168 2,347 0.00'0000' % 0.8750 2050 160.37 102 0.078228 00008994 API 24-42 Weld 163,370 12780.10 ],500 586.71 155,870 12,19339 7,698 450 427 8.575 177,373 8,575 0.000000% 0.8750 7500 586]1 102 6078228 04631986 APPOLLO#1 Well 19.370 2161.14 3.570 398.31 15,800 1,762.83 4,084 0 0 4,084 21.030 4,090 0,003000/ 0.8750 3570 39831 587 0.111572 00314994 ARISTOCRAT II-1 Weld 19955 1561.04 3,250 254.24 16705 1,306,80 3.716 0 0 3,716 21685 3716 0.0000009° 0 8750 3250 2:4.20 102 0.078228 00314994 ARISTOCRAT 11-2 Weld 19955 1561.04 3,250 254.24 16705 130680 3,718 0 0 3,718 21,665 3718 0000090% 08750 3250 254.24 102 0.078228 00315494 ARISTROCRAT 11-21 Weld 34330 2685.56 4210 329.34 30,120 2.35622 3,618 525 671 4.814 37,273 4,814 0003003%. 0.8750 4210 329.34 102 0,078228 00315194 ARISTROCRAT 11-24 Wed 34.340 2686.34 3,990 31135 30,360 2,374.99 3,618 407 521 4,547 37,283 4.547 0 % 0875 3980 311.35 102 0,078228 =87495 ARTS]11-13 Weld 59060 5764.66 5050 49292 54,010 5,271.74 0.'3,914 897 957 5,768 64,122 5,768 0,000% 0.8750 5050 49292 417 0.097607 LE 00099594 BAR 25-11 Weld 42.990 3329.88 4,710 3482 38,280 2,96506 3,918 676 786 5,380 46,615 5380 0.06100% 08750 4710 364.82 121 0,077457 00087395 BARNARD 4-22 Weld 108.8880 8655.50 6650 529.62 102,030 8,125.88 4,239 1,624 1732 7,596 117,995 7,596 OWE/ 08750 6650 529.62 140 0.079642 00087695 BARNARD 4-23 Weld 133200 10008.32 4020 320.16 129,180 10,288.16 4255 165 176 4595 144,617 4,595 0000000% 0.8750 4020 320.16 140 0.079642 00268888 BAUER 9-1 Weld 12,350 103512 3.620 303.41 8,730 73171 4,136 0 0 496 13,409 4,136 0.000609% 08750 3620 30341 743 0.083916 00314894 BEEBE DRAW 11.1 Wed 22570 176560 3200 250.33 19,370 1,51527 3,661 0 0 3862 24,505 3,662 0 % 0.8750 3200 250.33 102 0.078228 00315094 BEEBE DRAW 11-2RC Weld 45950 359458 3,130 244.85 42,820 3,349.73 3,575 0 0 3,575 49,889 3.575 0040000% 0.8750 3130 244.85 102 0078228 04807786 BEELER#1 Weld 13,530 1048W 3.410 264.13 10,120 783.87 3893 0 0 3893 14,690 3,893 0000005% 0.8750 3410 26413 121 0.077457 ` 00303494 BEITMAN 4-1 Wed 8,380 650.44 3,120 242.17 5,260 408.27 3569 0 0 3,569 9,098 3,569 0000000% 08750 3120 242.17 226 0.077619 00113894 BERNHARDT I-11 Weld 53650 4455.22 4480 371.61 49,170 407861 3,760 626 729 5,116 58,249 5.116 0000000% 0.8750 4480 371.61 552 0.082949 00114394 BERNHARDT 1-12 Weld 53,680 4452.70 4660 386.54 49020 4.066.16 3,761 721 839 5,322 58,281 5,322 0.030000°% 0.8750 4660 38654 552 0002949 00118034 BERNHARDT 13-12 Weld 74690 619546 6,180 512.62 68,510 5,682.84 3,853 1,556 1.659 706E 81,092 7.068 0.000000% 08750 6180 51262 550 0.082949 00115194 BERNHARDT 1314 Weld 59510 493630 5770 478,62 53,740 4,45)68 3,894 1,249 1,453 6.595 64.611 6.595 0.000000% 0.8750 5770 478.62 550 0.082949 00030294 BERNHARDT 7-31 Weld 55,820 4630.22 4960 411.43 9,860 4218.79 3,980 781 909 5,670 60,605 5670 0.000000% 08750 4960 411.43 550 0082949 0006:491 BETZ 81 Wed 47610 3791 66 4570 303.96 43.040 3,42070 5,227 0 0 522] 51 691 5,227 OC%'g0/° 0.8750 4570 36396 138 0079642 00276794 BETZ 914 Weld 40,350 334700 5,110 423.87 35,240 2,923.13 5,216 288 335 5,838 43.809 5838 0.000000% 0.8750 5110 423.87 550 0.082949 — 00077092 BETS 9-04 Weld 59,960 4775.34 4.630 368.74 55330 4,406.60 5,221 27 38 5,286 65,099 5,286 0.000 0.8750 4630 368.74 138 0.079642 —7 00052495 BICKLING 3-41 Weld 63,090 4887.26 5,600 433.80 57.490 4.453,46 3,775 1273 1357 6.405 68,498 6,405 0005000% 08750 5600 433.80 221 0.077465 00090795 BICKLING 342 Weld 82870 541952 4240 32345 78630 609107 3,751 528 563 4,842 89973 4842 0.00000%. 08750 4240 32845 221 0.077465 55 00090695 BICKLING 3.44 Weld 67.610 523740 4060 314.51 63550 492289 3,738 436 465 4,638 73,405 4638 0.000000% 0.8750 4060 31451 221 00/7465 00309394 BDHLENOE0.131RC Weld 50,540 0025.101 4600 366.35 459401 3.858./5 5,258 0 _ 5.255 54,872 5258 000'0000% 0.8750 4600 36635 178 0079642 ..v Page i of9 PRIMA OIL E.GAS COMPANY PETITION FOR REFUND OF TAXES•1997 TAXES(1996 PRODUCTION YEAR) Odginal Assessed Direct Assessed Value Production Abate.I Refund Abate.I Refund Balance Operating Return on Return of Total Allowable Exempt Royalty Assessment of Allowable Production Tax Schedule No. Well Name County Value Original Tax Assessed Value Tax Assessed Value Balance Tax Expenses Investment(ROI) Investment(Reg)Deduction 95%Limitation Deductions Percentage Ratio Deduction Tax Refund Distnq Tax Rate 00174693 BOHLENOER 29-13 Weld 46.110 3566.52 4.550 35193 41,560 3.21459 4.044 507 649 5,200 50,062 5,200 0000000% 08750 4550 351.93 128 0077348 00107589 BOHLENDER 33-02 Weld 1?980 1424.52 3550 281.26 14.430 1.14326 4,063 0 0 4,063 19,521 4063 00000'0% 08750 3550 281.26 104 0079228 00087295 BOHLENDER 33 OSRC Weld 159,6]0 12650.34 5,240 415.15 154.430 12235.19 5,990 0 0 5990 173356 5.990 OOOSW39 0.8750 5240 415.15 104 00]9228 00066791 BOHLENDER 33-05 Weld 35,427 2806.78 4,040 32008 31.387 2,48670 4621 0 0 4.621 30,463_ 4,621 0.00'0000% 0.5750 4040 320.08 104 0.079228 - 00066791 BOHLENDER 33-06 Weld 35,427 2806.79 4.060 32087 31.377 248592 4,625 0 0 4,625 38,463 4,625 0.00000% 08750 4050 320.87 104 0079228 00066791 BOHLENDER 3307 Weld 35,427 2806.79 4,050 32087 31377 248592 4,627 0 0 4627 38,463 4627 0000000% 05750 4050 320.87 104 0.079228 06077292 BOENOER 33-22RC Weld 172,440 13662.08 7.190 569.65 165,250 13,092.43 8,210 4 ML5 8219 187,221 8,219 00]0000% 0.8750 7190 56965 104 0.079228 00120194 BOOTH 25-11 Weld 74.620 6005.94 4,680 37666 69,940 5,629.26 3.999 625 721 5352 51.018 5.352 0OS000k 0.8750 4680 376.68 556 0.080487 00120294 BOOTH 25-12 Weld 38,350 3096.68 5,160 416.92 33,170 2669.76 4,017 920 981 5,918 41.637 5918 0000000% 0.0150 5180 416.92 556 0080487 00278495 BOOTH 25-14 Weld 74,630 6006.74 4,930 396.80 69,700 5,60394 4020 782 834 5,635 81,027 5635 0.00000% 0.8750 4930 396.80 556 0080487 00163892 BOULTER 31-2 Weld 31,160 2705.94 3,140 272.60 28,020 2433.26 3,591 0 0 3,591 33831 p. 3,591 0000000% 08150 3140 27268 732 000684 00193290 BOULTER 101 Weld 40,550 3229.48 3.470 276.36 37,080 2,953.12 3.962 0 0 3,962 44,026 3,962 0.000000% 0.8750 3470 276.36 138 0.079642 - 00076662 BOULTER 10-41 Weld 26.190 2074.98 3.670 290.77 22,520 1,784.21 4,004 44 62 4.190 20.435 4,190 0,009000% 0.8750 3670 290.77 108 0.079228 00076792 BOULTER 10-43 Weld 38,240 3045.52 3.360 267.60 34,880 2,777.92 3,813 11 16 3840 41,518 3,840 0000X0% 0.8750 3360 26)60 138 0.079642 04340046 BOULTER II-1 Weld 30.670 2442.62 3300 262.82 27.370 2,17989 3,776 0 0 3776 33.299 3,778 0.00.'0.'0% 0.8750 3300 262.82 140 0.079642 00163792 BOULTER 31-1 Weld 22230 1930.46 3.360 289.18 18,900 1,641.28 3,006 0 0 3,806 24,135 3806 0000000% 0.8750 3330 289.18 732 008684 00271394 BRIGGS 1-11 Weld 92,990 7202.72 5,310 41130 07.680 6,791,42 4,228 849 988 6,065 100,961 6,065 0.000000% 0.8750 5310 411.30 121 0.077457 00009094 BRIGGS 1-12 Weld 80,240 62100.14 4,7 371.02 75450 5.844 17 4.108 633 736 5.47 87.118 5,477 0.000000% 0.8750 90 37102 121 0077451 00271494 BRIGGS 1-14 Weld 55890 4329.08 5.309 410.52 50.590 3,918.56 _ 4,164 877 1,020 6061 60.681 6,061 000000%' 47 0.6750 5300 410,52 121 0077457 00088695 BROWN 3-14 Weld 65.980' 5111.14 6,590 510.49 59,390 4600.65 - 3883 1763 1661 ]527 71,635 7,527 0.000000% 08750 6590 510.49 221 0.077465 00075692 BRUNNER 14-1 Weld 32.030 2693.30 3530 296.63 28.500 2,396.47 4,029 0 0 4029 34775 4029 0000000% 0.8750 3530 296.83 740 0084087 00252988 BURKE 24-1RC Weld 24,465 1913.85 11350 887.89 13,115 102596 12,988 0 0 12,968 26,562 12968 0.000000% 0.8750 11350 887.09 102 0.078228 00252988 BURKE 24-2RC Weld 24.465 191385 9,540 74630 14925 1.167.55 10900 0 0 10900 26.562 10900 0000000/ 0.8750 9540 74630 102 0.078228 00064391 BURKE 24-3 Weld 20,060 156926 3.200 250.33 16.860 1.31893 3.569 23 60 3,652 21,779 3.652 0000300%. 08150 3200 250.33 102 0078220 00064591 BURKE 24-3S Weld 6,560 513.18 5,470 427.91 1.030 8527 6,249 0 0 6,249 7,122 6.249 000000% 0.8750 5470 427.91 102 0.076228 00156787 CARLSON 10-1 Weld 6030 48804 3110 24140 2920 226.64 3559 0 0 3,559 6,547 3.559 0000000% 0.8750 3110 241.40 226 0.077619 00171993 CARPIO 22-41 Weld 28,010 2336.10 3,150 262.72 24,860 207338 3,605 0 0 3,605 30411 3,605 0.0CPZ0^% 0.8750 3150 262.72 713 0.083402 00089595 CECIL 23-13 Weld 58,650 503452 6410 550.23 52.240 4,484.29 4,308 1,460 1557 7,325 63677 7.325 0000000% 00750 6410 550.23 752 0.06584 01207986 CHAMPLIN 23-3 Weld 22250 1870.94 3.620 304.39 18,630 1566.55 4,139 0 0 4,139 24,157 4,139 0000000% 08750 3620 304.39 740 0084087 00278395 CHRISTIANSEN 1.35 Weld 63540 5511.90 ?050 61157 56,490 4900.33 6,235 798 1.022 0,055 68.986 8055 0000000% 0,5750 7050` 611.57 429 0.086747 00171793 COBB 0 4 23 Weld 33,100 28740 4,230 367.33 28,870 2,507.07 3.750 475 607 4,832 35.937 4,832 0.000000% 08750 4230 367.33 738 008684 00115094 COCKROFT 11-23 Weld 33,650 2815.60 5940 497.02 27.710 2,31858 3918 1390 1,483 6792 36534 6,792 0000000% 08750 5940 497.02 712 0.083673 00153988 COLLINS I-1 Weld 15,610 1221.14 3,140 245.64 12.470 975.50 3589 0 0 3509 16,948 3.589 0.000000% 08750 3140 245,64 102 0.078228 00091195 CORNELIUS 11-22 Weld 41,200 322300 5.010 391.92 36.190 2,831.08 3.971 883 869 5,722 44,731 5,722 0000000% 0.8750 5010 39192 102 0.078228 00030995 CORNELIUS 11-23 Weld 45.160 353278 4.950 30723 40,210 3,14555 3973 813 867 5,653 49.031 5,653 0000000% 08750 4950 387.23 102 0.078220 04263306 'COX 8-1 Weld 9.330 800.86 r 3.270 28070 6060 520.18 3,740 a 3.'40 '0'30 3740 0000000% 08750 3270 28070 742 006584 00170003 DECHANT 7-11 Weld 3.310 110876 3220 26811 10090 840.15 3602 0 0 3,682 14.451 3682 000 % 08750 3220 266.11 730 0003265 00171693 IOECHANI 7-14 Weld 13310 110826 3280 27311 10.030 83515 3745 0 0 3,745 14.451 3.745 0000312% 0 08750 3280 273.11 730 0083265 Page 2 of 9 PRIMA OIL&GAS COMPANY PETITION FOR REFUND OF TAXES-1997 TAXES(1996 PRODUCTION YEAR) Original Assessed Direct Assessed Value Product ion Abate,I Refund Abate.I Refund Balance Operating Return on Return of Total Allowable Exempt Royalty Assessment of Allowable Production Tax Schedule No. Well Name County Value Original Tax Assessed Value Tax Assessed Value Balance Tax Expenses Investment(ROI)Investment(Rog)Deduction 95%Limitation Deductions Percentage Ratio Deduction Tax Refund District Tax Rate 04262986 DIETRICH 7-1 Weld 61.310 5262.86 4200 360.53 57,110 4,90233 4803 0 0 4,803 66,555 4,803 0.000000°/. 0 875 42110 3650.53 ]42 0.08581 0015601695 DINGES 3-33 Weld 35,220 2961.54 6,440 541.52 28.780 2,420.02 4,088 1,585 1690 7,363 38,239 7,363 0000030% 0.8750 6440 541.52 740 006408] 04289686 DINNER 1-1 Weld 13,590 1200.52 3,140 27738 10.450 923.14 3,587 0 0 3.58] 14,755 3.587 000000% 08750 3140 277.38 749 0.088339 01051996 DINNER 1-14 wee 143,500 1267664 6,250 552.12 137,250 12,124.52 4745 1,210 1,191 7,146 155,800 7,146 0003000.4 0.8750 625 552.12 749 0088339 04280786 DINNER 1-2 Weld 16.660 1464.84 4.120 362.25 12,540 1,102.59 4.711 0 0 4.711 18,088 4.711 0.000000% 0.8750 4120 362.25 718 0087925 04289886 DINNER I-3 Weld 21.650 1912.54 4,040 356.89 17,610 1,555.65 4.615 0 0 4615 23,500 4,615 000000% 00750 4040 356.89 749 0.088339 01253186 DINNER 14-IRC Weld 9.503 735.92 3.220 24944 6.280 485.48 3,682 0 0 3682 10,314 3602 0000083% 0.8750 3220 249.44 220 0.077465 ' 000294 DINNER 1-42 Weld 184.800 1632504 5.130 453.18 179,670 15.87186 5,101 384 378 5.863 200,640 5,863 0000000% 0.8750 5130 453.18 09 749 0.088339 08008194 DINNER 1-44 Weld 43,910 387896 4.890 43198 39,020 3,446.98 4,693 415 483 5,591 47,674 5.591 0000000% 0.8750 4890 43198 749 0.088339 01254386 DINNER 15-IRC Weld 111,140 8626.58 54.680 4,244.21 56,460 438237 62,472 2 20 62493 120.666 62,493 0.0000'0% 0.8750 54680 4,244.21 226 0.077619 04261488 DINNER 61 Weld 17,560 152492 3.100 269.20 14.460 1,255.72 3.542 0 0 3542 19.055 3.542 0000000% 0.8750 3100 269.20 738 000$4 042615888 DINNER 6-2 Weld 18,810 1633.46 3.340 290.05 15.470 1343.41 3.816 0 0 3,816 20.422 3,816 0080000% 0.8750 3340 290.05' 738 0.08684 - 00156387 DINNER 6-3 Weld 14,600 1267.86 3,160 2741 11440 993.45 3,615 0 0 3.615 15,851 3.615 0.000000% 0.8750 4 3160 2741 4 738 0.08684 03917986 DOLL 23-1 Weld 13,]60 120948 3,360 295.34 10,400 914.14 3,838 0 0 3,838 14,939 3,838 0 000000% 0.8750 3360 29534 698 0.087898 01587186 DUNGAN XI Weld 8,200 707.94 3080' 26591 5,120 442.03 3,524 0 0 3,524 8,903 3.524 0.0"'0000% 08750 3080 265.91 400 0086333 00009494 EHRLICH 23-11 Weld 65,610 732024 3,970 44294 61,640 6,877.30 3,873 309 360 4.543 71,234 4,543 0000800% 0.8750 3970 442.94 589 0.111572 0,209194 EHRLICH 23-14 Weld 42310 4720.62 4,440 49538 37,870 4,225.24 3,815 583 679 5,077 45,937 5.077 0000000% 08750 4440 495.38 589 0.111572 00072492 EMC 36-1 Wed 7730 622.16 2940 236.63 4,790 385.53 _ 3834 0 0 3.834 9,592 3.834 125000✓'/. 0,8750 2940 236.63 557 0000487 00191493 EMC 36-2 Weld 13,710 1103.48 3,030 24380 10.680 85960 3,961 0 0 3961 17,012 3,951 12500(00% 06750 3030 243.88 557 0.080487 00152490 ENGLISH 31-20 Weld 27,610 2395.08 3570 30369 24,040 2.085 39 3981 7 94 4,085 29.977 4,085 0.000000% 0.8750 3570 30969 430 0086747 00030395 ERICKSON 5-43 Weld 40,160 311100 6.470 501.20 33,690 2,609.80 4,276 1503 1,609 ?394 43.602 7.394 000000% 0.8750 6470 501.20 220 0077465 00161'186 FARAMIR FARMS 62 Weld 19090 163868 3,240 278.12 15,850 1,36056 3,780 0 0 3,706 20.726 3,706 000000005 08750 3240 278,12 753 0,08584 04963186 FARAMIR FARMS 6-IRE Weld 21,190 1818.94 3.380 290.14 17,810 152800 3,855 3 7 3,865 23,006 3,865 0,000000% 0.8750 3380 290,14 753 0.00584 04963280 FARAMIR FARMS 8-3 Weld 11.750 1008.62 1420 121.89 10,330 886.73 375 639 605 1,619 12,751 1619 0000000% 0.8750 1420 12189 753 0.08584 01088797 FARAMIR FARMS 5-32 Wed 37,330 3204.40 0' 000 37,330 3,204.40 0 0 0 0 40530 0 0000000% 08750 0 000 753 068584 01076797 FARAMIR FARMS 6-34 Wed 58,430 515.64 1,100 94.42 57.330 492122 910 179 170 1,259 63,438 1,259 0.00.000% 08750 1100 94.42 753 000584 00154788 FARAMIR FARMS6-4 Weld 16,8350 1399.20 3400 291.86 12,900 1,107.31 3,884 0 0 3,834 1?69] 3.884 0000000% 0.8750 3400 291.86 753 008584 04077786 FERGUSON 35-1 Weld 41.610 3235.68 4.190 325.82 37,420 2,909 86 4,151 87 555 4793 45.177 4793 0 /a 0.8750 4190 325.82 142 0.077762 00309294 FRANK 131 Weld 15250 1214,54 3,520 280.34 11,730 934.20 4,018 0 0 4,018 16,557 4.018 0000x0% 08750 3520 280.34 138 0079642 01077297 FRANK 13-21 Weld 153,210 1220196 1,660 132.21 15155 12,069.75 754 587 556 1,898 166342 1898 0000000% 08750 1660 13221 138 00]9642 00272394 FRANK 25-13 Weld 43030 3330.66 5000 387.29 381100 2943.38 3909 836 972 5.717 46686 5,717 0.000000% 0.8750 5000 387.29 121 0.077457 00088495 FRANK 32-23 Weld 49340 3672.52 4,180 311.13 45,100 3361.39 2708 1,803 1,070 4780 53,560 4.780 00x000% 08750 4180 311.13 105 0.074433 00088195'FRANK 32-24 Weld 24150 1797.56 3,290 244.88 20.860 155268 2,634 547 583 3.765 26,220 3,765 0.000000% 0.8750 3290 244.88 106 0.074433 04350186 FRY 13-1 Weld 15,480 122644 3,320 263.00 12.160 96340 3792 0 0` 3792 16,807 3.792 0000000% 0.8750 3320 263.04 108 0.079228 00154288 FRY 13-2 Weld 11,740 930.14 3210 254.32 0.530 67582 3673 0 0 3673 12,746 3,6]3 0.00000% 08750 3210 254432 108 0079228 00252083 FRY 161 Weld 12820 110045 3.660 314,4 9,160 78€79 0 187 0 0 4.187 13.919 4,187 00000X00% 0.8750 3660 314.17 742 008584 01087797 GILCREST TOWRSITE 21-34 Weld 137.]00 1066582 7.850 608.04 129,850 1005778 7,437 788 747 8.972 149,503 8.972 00000(0% 0.6750 7880 608.04 121 00/7457 000]5992 GILCREST 1OWN51162612 Weld 30.160 224490 0 000 30.160 2244.90 0 0 0 0 32.745 0 008000% 0.8750 0 000 106 0074433 Page 3 of 9 PRIMA OIL 8 GAS COMPANY PETITION FOR REFUND OF TAXES-1997 TAXES(1996 PRODUCTION YEAR) Original Assessed DIrect Assessed Value Production Abate,/Refund Abate.I Refund Balance Operating Return on Return of Total Allowable Exempt Royally Assessment of Allowable Production Tax Schedule No. Well Name County Value Original Tax Assessed Value Tax Assessed Value Balance Tax Expenses Investment lROll Investment(Roll)Deduction 95%Limitation Deductions Percentage Ratio Deduction Tax Refund District Tax Rate 01205386 GILL LAND 22-IRC Weld 19550 1638.60 3,360 281.62 16.190 1.35698 3.835 0 0 3.835 21226 3,835 0.000000% 0.8750 3360 281.62 743 0.083816 01205186 GILL LAND 22-3 Weld 11,200 938.74 3.530 295.87 /,670 642.87 4040 0 0 4.040 12.160 4.040 0.000000% 0.8750 3530 295.87 743 0.083816 00047591 GOODHAR022-1 Weld 14.690 1123.16 3,120 230.55 11570 884761 3,562 0 0 3,562 15.949 3,562 0609360% 0.8750 3120 238.55 118 0.076457 00191193 GOZA 181 Wok] 38,710 3004,64 3,260 25304 35.450 2,751.60 3.870 0 0 3,870 43,685 3,870 3.794050% 0.8750 3260 253.04 225 0077619 0090095 GREEN 17-33 Weld 40,640 3148.18 4,760 368,73 35,880 2,779.45 4,016 719 708 5.443 44,123 5.443 0.030000% 0.8750 4760 368.73 220 0.077465 00029994 GREENHEAD 1811 Weld 36.403 2949.68 4,650 376.81 31,750 2.57287 3.729 734 855 5,318 39,520 5,318 060860:% 0.8750 4650 37681 521 0.081035 00030394 GREENHEAD 18-12Weld 54760 454228 4,720 391.52 50.040 4150.76 3,730 768 894 5.392 59,454 5.392 00000%% 08750 4720 391.52 550 0082949 4 04101486 GUNTHER 181 Weld 13.400 1123.14 3,200 26021 10,200 854.93 3,652 0 0 3,652 14.549 3,652 0.000000% 0.8750 3200 268.21 734 0.083816 04101586 GUNTHER 18-2 Wed 8980 772.88 3,180 276.15 5,720 496.73 3.639 0 0 3,639 9,663 3,639 000.603% 08750 3180 276.15 732 00868° 00173593 GURLEY 31-23 Weld 30,040 2235.96 3220 23967 26,820 1,996.29 2,516 512 656 3.605 32,615 3685 00% % 08750 3220 239.67 106 0074433 00173493 GURLEY 31-24 Weld 30,040 2235.96 3,130 232.98 26.910 2.002.98 2,475 484 620 3,579 32.615 3,579 00000'.3% 0.8750 3130 232.98 160 0,074433 00303594 GUTTERSEN 5-1 Weld 14,700 114100 3.320 257.70 11.380 883.30 3.793 0 0 3,793 15,960 3,793 OOD]CO% 0.8750 3320 257.70 226 0077619 01626686 HANKINS 81 Weld 550 4426 520 4165 30 2.41 3,524 0 0 3,524 597 597 0000000% 0.8750 520 41.85 556 0,060487 01626486 HANKINS/12 Wed 1400 112,10 1.330 106.50 70 560 3,524 0 0 3,524 1.520 1,520 0.000000% 0.8750 1330 106.50 520 0080073 00308994 HARLESS 17-1 Weld 12.730 110548 2.190 190.18 10,540 915,30 2.504 0 0 2,504 13,821 2,504 06003006 08750 2190 19018 732 0.08684 00308894 HARLESS 17-2 Weld 9.020 78330 3,180 276.15 5,860 507.15 3,630 0 0 3630 9,793 3,630 0000000% 0.8750 3180 9616 732 0.08684 00158890 HENRY 5-1 Weld 28.655 219549 3.320 254.37 25,335 1,941.12 3.793 0 0 3,793 31.111 3.793 000005% 0875 3320 254.37 141 0.076618 -5-00158590 HENRY 5-2 Weld 28,655 2195.49 3260 2 .77 25,395 1,945.72 3,722 0 0 3.722 3,722 00MWk1% 0.8750 3260 24977 141 0,076618 00106189 HENRY 5-3 Weld 31,440 250392 3,320 264.41 28.120 2.239.51 3796 0 0 3,796 34,135 3,796 006050% 00750 3320 264.41 140 0079642 00106889 HENRY 5-4 Weld 32,120 2558.34 3.260 25963 28,860 2250.71 3,724 0 0 3.724 34,873 3.724 0.00009% 08750 3260 259.63 140 0.079642 00155187 HOLMAN 14-1 Weld 8,660 725.84 3.490 292.52 5,170 433.32 3994 0 0 3.994 9.402 3,994 0000009% 0,8750 3490 29252 743 0003816 01151697 HOWARD 0-42 Weld 3199 277804 810 70.54 31090 2,707.50 730 98 93 921 34.634 921 09050% 0.8750 810 70.54 604 097066 00063991 HOWELL 32-1 Weld 40565 3482.10 3,570 306,45 36,995 3.17565 4,082 0 0 4,082 44,042 4.082 0.90000% 08750 3570 306.45 742 0.08584 00063991 HOWELL 32-2 Weld 40,565 3482.10 3530 303.02 37.035 3,17908 4032 0 0 4.032 44,042 4,032 009013% 0.8750 3530 303.02 742 0.08584 00076092 HOWELL 32-23 Wed 65,650 5635.40 4,280 36]40 61,370 5,268.00 4,712 74 105 4,890 71.277 4.890 0000000% 0.8750 4280 367.40 753 09584 00253387 HUWA 11-IRC Weld 32,420 258200 3,400 277.15 28,940 2,30485 3,974 0 0 3,974 35,199 3,974 0.0505% 0.8750 3480 277,15 138 0079642 00063191 HUWA 11-2 Weld 40.850 3237.44 3,390 26999 37.260 2.9745 3869 0 0 3.869 44,134 3,869 0.9000056 08750 3390 269.99 138 0079642 0029787 JOHNSON 1-22 Weld 27.520 2294.78 389 321.87 23,660 1972.91 4,410 0 0 4410 20879 4,410 0.000000% 0.0750 3860 32107 606 0083386 ii 00061591 JOHNSON22-11 Weld 120 9 390 586.68 244.02 9,500 752.66 3524 0 0 3,524 13658 3,524 awc000'% 08750 3000 244.02 104 0.079228 04284386 JOHNSON 291 Weld 10810 910.76 2,100 18026 8,510 730.50 2401 0 0 2,401 11,519 2,401 0 9900% 0.8750 219 180.26 753 008581 00253287 JURGEN581 Weld 13,585 1179.72 3,730 280.49 10,355 399.23 3693 0 0 3,693 14.749 3,693 9 0. 0800% 0.8750 3230 280.49 738 0.08684 00253287 JURGEN582 Weld 13.585 1179.72 3,370 29265 10,215 887.07 3,857 0 0 3,857 16749 3,857 0 000000% 0.8750 3370 292.65 738 0.08684 00087595 KALLAS 4-42 Weld 68,390 :486.54 5.500 43803 63,300 5.04851 4,457 884 942 6.283 74.795 6,283 0.0000W% 08750 559 438.03 140 0,079642 00272094 KAMMERZEL 4 7-41 Weld 41,930 3460.70 4,770 39369 37,19 306701 3,915 709 825 5,450' 45,524 5.450 0 08750 4770 39369 547 0.082535 0027194 KAMMERZELL 7-42 Wed 41,950 3462.34 48 2 40 3896 37.310 307938 3,927 638 743 5,307 45.546 5,30) 000001°% 08750 4610 382.96 547 0.082535 J - 0930194 KAMMERZELL 7-43 Weld 55430 4574.52 4,610 39699 50,620 4,177.93 3,930 722 840 5493 60.181 5493 066009% 0.8750 4810 396.99 547 0082535 00030094 KAMMERZELL 7-44 Weld 74,940 6185.18 45/0 317 18 70.370 5.80800 3925 627 669 5.221 81,353 5221 000009% 08750 4570 377.18 547 0082535 00776394 KNAUB 4-1 Weld 172/0 1368.26 3.270 259.08 14,000 1.10910 3,741 0 0 3]41 18.750 3.741 091 0875 390 259.08 104 0079228 Page 4 of 9 PRIMA OIL&GAS COMPANY PETITION FOR REFUND OF TAXES-1997 TAXES(1996 PRODUCTION YEAR) Original Assessed Direct Assessed Value Production Abate.I Refund Abate.I Refund Balance Operating Return on Return of Total Allowable Exempt Royalty Assessment of Allowable Production Tax Schedule No_ Well Name County Value Original Tax Assessed Value Tax Assessed Value Balance Tax Expenses Investment(ROI) Investment(Roe)Deduction 95%Limitation Deductions Percentage Ratio Deduction Tax Refund District Tax Rate 00276594 KNAUB 4-32 Weld 115300 913498 4.680 37079 110,620 8,764 19 3,743 744 865 5352 125,183 5,352 0.000030% 0.8750 4680 370.79 104 0079228 04294888 KNAUB St Weld 25,110 1923.88 3,380 258,97 21.730 1,664.91 3,859 0 0 3,859 27.262 3.859 0.003000% 0.8750 3380 25897 139 0.076618 00174293 KNAUB 5-12 Wei 79380 6081.94 3,910 299.58 75,470 578236 3970 221 282 4,473 86104 4,413 0800000% 0.8750 3910 299.58 139 0.076618 00148787 LAND 31-01 Wed 24260 1897.82 3.120 244.07 21,140 1,653.75 3,524 9 30 3563 26,339 3,563 0.806800% 0.8750 3120 244.07 123 0.078228 - 00107489 LAND 31-01A Weld 2.780 217.48 2.640 20652 140 10.96 3.524 0 0 3,524 3.018 3018 0600000% 08750 2640 206.52 123 0078228 ^6015439] LAND 31,-02 Weld 6640 519.44 0 0.0 6,640 519.44 0 0 0 0 ],203 0 0066000°% 0.8750 0 000 123 0.078228 ' 00173993 LAND 31-11 Weld 101.360 7929.20 4250 332.47 97,110 7,596.73 4,100 330 423 4,853 110,048 6,853 0.00x00% 0.8750 4250 332.47 123 0.078228 00172893 LAND 31-13 Weld 57,150 447074 4.510 35281 52,640 4,117.93 4369 345 441 5,155 62.049 5.155 0608030% 08750 4510 352.81 123 0078228 0900085191 LATHAM 91 Weld 61,540 4689.60 0 000 61,540 4.689.60 0 0 0 0 66,815 0 0.0.'LQT% 08750 0 000 105 0.076204 04290886 LATHAM 2-1 Weld 17.620 1342.72 3.350 255.28 14,270 108744 3828 0 0 3828 19,130 3828 0.WOc03' % 0.8750 3350 255.28 105 0076204 00315095 LATHAM 2-42 Weld 31,88° 252578 5.500 43575 26,380 2.090.03 4.982 573 733 6,288 34,613 6,288 00.500009 0.8750 5500 435.75 108 0079228 00315195 LATHAM 2-43 Weld 31,880 2525 5 78 S.YA 4375 26380 2,690.03 - 4,992 569 728 6,289 34613 6,289 0500% 08750 5500 435.75 108 0.079228 00076992 LATHAM 2-04 Weld 57,200 4358.86 3310 252.24 53,890 4,106.62 3,787 0 0 3,787 62,103 3787 0,800'0% 0875 3310 25224 105 0.076204 04291686 LATHAM 3-1 Weld 24000 1838.84 3,400 260.5 20,600 1578.34 3,885 0 0 3,885 26,057 3,885 0000033% 0.8150 3400 260.5 141 0.076618 04291286 LATHAM 3-2 Weld 17,960 1422.94 3,910 309.78 14,050 1,113.16 4,471 0 0 4471 19.499 4.471 0003000% 0.8750 3910 309.78 104 0.079228 — 01088397 LATHAM 3-24 Weld 280.190 16573.70 6.640 52607 202,550 1604763 7.584 194' 184 7,962 227,121 7.962 0.000000% 08750 6970 552.22 104 0079228 00172293 LATHAM 3-34 Weld 53,620 4006.82 3,]50 285.77 49,880 3,80106 3,894 172 221 4,288 58,227 4,288 0.000000% 0.8750 3750 28577 100 0.076204 00077192 LEAMING 27-24 Weld 32,700 2860.72 3,590 314,07 24.110 2.546.65 4069 15 21 4,106 35,503 4,106 0000000% 08750 3590 314.07 641 0.087484 00238593 LINDBLAD 22-20 Weld 12590 1002.14 3,490 302.75 9,100 780.39 3,991 0 0 3,991 13,669 3,991 0660000% 08750 3490 302.75 430 0086747 01077497 LOFLAND 22-42 Weld 51,630 5065.56 1560 137.12 56.070 692844 959 421 399 1780 62,570 1.780 003000% 08750 1560 137.12 697 0087898 I 010765597 LOFLAND 22-43 Weld 60,170 5288.82 1,560 137.12 58.610 5,151.70 1047 377 358 1701 65.327 1,781 0000680% 08750 1560 137.12 697 0067890 01151097 LORENZ FARMS 22-13 Weld 12,570' 1104.88 1860 163.49 10.710 941.39 835 6662 627 2,124 13,647 2.124 0.000000% 0.8750 1860 163.49 697 0.087898 00154487 LOUSTALET 15-1 Weld 19.450 1689.04 3230 280.49 16,220 940855 3,691 0 0 3631 21.11] 36991 0.000000% 08750 3230 280.49 738 09%84 04285086 LOUSTALET 30-IRC Weld 65,460 5619.08 11,040 947.67 54.420 4,671.41 12,614 0 0 12,614 71,071 12,614 OOOOOx% 00150 11040 947.67 753 0.08584 00105790 LOUSTALET 30-2RC Weld 13.620 1169.14 5.300 45495 8.320 714.19 5,935 40 85 6.060 14,787 6,060 0.000000% 0.8750 5300 454.95 753 000584 00063891 LOUSTALET 30-3 Weld 29.070 249536 16.040 1376.87 13,030 1,11849 16.334 0 0 18334 31,562 18,334 0.000000% 08750 16040 137687 742 000584 00068591 LOUSTALET 30-4 Weld 33,320 286018 14.680 1260.13 18,640 160005 16759 6 10 16,775 36,176 16.775 0.000000% 08]50 14680 1,260.13 742 0.08584 00010094 LUNDVALL 13-12 Weld 55.150 4764.10 5280 458.02 49870 4,326.08 4,024 929 1,081 6.IXM 59.877 6,034 0000000% 08750 5280 458.02 429 0.086747 00009694 LUNDVALL 13-13 Weld 55,150 4784.10 5,180 449.35 49,970 4334.75 4,051 862 1003 5916 59.877 5916 0.Gx000% 0.6750 5180 449.35 429 0.086747 00087195 LUNDVALL 13-14 Weld 72.880 6322.12 8,150 706,99 64,730 5615.13 5,860 1,674 1,786 9,320 79,121 9,320 0668000% 08750 8150 706.99 429 0086747 00193590 MARK 35-01 Weld 17,860 1415.02 3,300 261.45 14.560 1,153.57 3.775 0 0 3.775 19.391 3.775 0066800% 08750 3300 261.45 104 0.079228 00193490 MARK 35-02 Weld 23,430 1856.32 3,320 263.04 20.110 1,59328 3797 0 0 3797 25,438 3797 0.00000% 0.0750 3320 263.04 104 0.079228 00173093 MARK 3511 Weld 25,620 2029.82 4.170 330.38 21,450 1699.44 3931 364 466 4,761 27,816 4.761 0.00000M 0.8750 4170 330.38 104 0,079228 00112993 MARK 35-13 Weld 45,510 3605.66 4460 353.36 41.050 3.252.30 3.838 553 108 5103 49411 5.100 00000x% 0.8750 4460 353.36 104 0079228 — 04300286 MCCARTHY 91 Weld 23930 180592 4480 35494 19.450 1,540.98 4979 5 132 5.116 25,981 5,116 0806040% 08750 4480 35494 104 0079228 01088297 MCCARTHY 6-33 Weld 201800 15979.50 5,980 4/3/9 195.710 15.505.72 7,99 501 475 8,055 226727 8056 3418035% 08750 6810 539.54 104 0.079228 00252688 MCCLELLAN 3-1 Weld 11 530 91828 3.260 25963 8270 658.65 3724 0 0 3724 12,518 3,724 0000000% 08750 3260 259.63 140 0.079642 — 00008394 MCCLELLAN 3-32 Weld 117.330 934410 5.160 41095 117.170 8,933.45 4262 754 677 5.893 127,387 y 5,893 0100%00% 0.8750 5160 41095 140 0079642 Page 5 of 9 PRIMA OIL&GAS COMPANY PETITION FOR REFUND OF TAXES-1997 TAXES(1996 PRODUCTION YEAR) Original Assessed Direct Assessed Value Production Abate.I Refund Abate./Refund Balance Operating Return on Return of Total Allowable Exempt Royalty Assessment of Allowable Production Tax Schedule No. Well Name County Value Original Tax Assessed Value Tax Assessed Value Balance Tax Expenses Investment(ROI)Investment(Rob)Deduction 95%Limitation Deductions Percentage Ratio Deduction Tax Refund District Tax Rata 00293386 MCCLELLAN 41 WeB 23.790 1894.68 3.550 282.73 20,240 1,611.95 4,061 0 D 4,061 25.829 0.061 0.03000% 0.8750 3550 282.73 138 0079642 00272494 MCCLELLAN 4-12 Weld 38,330 305268 0.440 35361 33,890 2.699.07 4.056 472 549 5078 41,615 5,078 0073407%. 08750 4440 353.61 138 0,079642 00253587 MCKENNEY 6-1 Weld 16.940 1454.12 3,460 297.01 13.480 1157.11 3,953 0 0 3,953 18,392 3.953 00000 O% 0.8750 3460 29701 753 000584 00171593 MCKENNEY 612 Weld 37,540 322244 4,500 07 386.28 33.000 2.836.16 3.840 571 731 5,142 40,758 5,142 0.0300%% 0.8750 4500 386.28 753 0,08584 00171393 MCKENNEY 6-14 Weld 37.560 3224.16' 4,840 41547 32.720 2,600.69 4.022 661 846 5528 40,779 5,528 0LhT00% 0.8750 4840 415.47 753 0.06504 00253687 MCKENNEY 6-2 Weld 16,360 1404.34 3,110 266.96 13.250 1137.38 3,549 0 0 3,549 17,762 3,549 0 % 0.8750 3110 266.96 753 008584 00066292 MCKENNEY 63 Weld 37,810 324562 3,200 278.12 34,570 296750 3.705 0 0 3705 41,051 3705 0.07"400% 0.8750 3240 278.12 753 0.86584 0076392 MCKENNEY 6-42 Weld 19,350 1661.00 3,460 297.01 15.890 1.363.99 3,950 0 0 3.950 21,009 3950 000040% 08750 3460 297.01 753 0.08584 00075492 MOKENNEY 6-43 Weld 19,360 166186 3,460 297.01 15,900 1,30085 3,951 0 0 3951 21.019 3.951 0400000% 08750 3460 297.01 753 0.08584 00064091 MCLEOD 29-01 Weld 19.545 151390 2,090 16189 17,055 1352.01 2.384 0 0 2,384 21,220 2.381 9.000000% 0,8750 2090 161.89 121 0.077457 00064091 MCLEOD 29-02 Weld 19,545 151390 2080 192.09 17,065 1,321.81 2839 0 0 2,839 21,220 2,839 0070701% 08750 2480 192.09 121 0077457 00053195 MCLEOD 29-13 Weld 44.380 3437.54 4,230 327.64 40,150 3,109.90 2,506 1,126 1,201 4,832 48,184 4.832 00CU0.0% 0.8750 4230 327.64 121 0.077457 00052995 MCLEOD 2414 Weld 49,720 3851.16 3,860 29898 45.860 3,552.16 2,426 960 1,024 4409 53,982 4,409 0000000% 0.8750 3960 298.98 121 0077457 00052895 MCLEOD 29-41 Weld 49.730 385194 3.760 29124 45,970 3,560.70 2,501 867 925 4.293 53.993 4.293 0000008% 0.8750 3760 291.24 121 0.077457 01076497 MCMURREN 22-31 Weld 51670 452030 1,770 154.85 49,900 436545 1,045 505 479 2028 58,609 2,028 0.000000% 08750 1770 154.85 641 0.087480 00271594 MCWILLIAMS 111 Weld 11,160 884.18 2,970 235.31 8.190 648.87 3,392 0 0 3392 12.117 3.392 00hC00% 08750 2970 235.31 108 0.079228 00271594 MCAWL,.IAMS Ad Weld 20.870 1653.48 2,700 213.92 18,170 1439.56 3,006 0 0 3086 22.659 3,006 0.000000% 0.8750 2700 213.92 108 0.079228 00271194 MCWILLIAMS 15-32 WeM 41720 3800.52 4220 336.09 43500 346443 3.419 650 756 4,824 51,810 4.824 0.724007% 08/50 4420 336.09 138 0.079642 00173393 MCWILLIAMS 1534 Weld 44.680 3558.40 4,580 364.76 40,100 3.19364 3,647 694 898 5,229 46,510 5,229 0.002000% 06750 4580 364.76 138 0.079642 00047891 MO 20,1 Weld 26810 199940 3.130 233.43 23.680 1,765.97 3,581 0 0 3581 29,108 3.581 0000000% 06750 3130 233.43 129 0.074577 00047691 MD 20-2 Weld 26,180 195242 3,300 246.10 22,860 1,786.32 3,567 79 127 3,773 28,424 3,773 000000:% 08750 3300 246.10 129 0.074577 00364291 MILLER 24-1 Weld 26400 206522 3.450 269.89 22950 1.79533 3,946 0 0 3,946 28.663 3,946 0.003000% 0.8750 3450 269.89 102 0.078228 00064691 MILLER 24-1S Weld 13.390 10246 3,270 255.81 10,120 791.67 3.741 0 0 3,741 14,538 3,741 0.000000% 0.8750 3270 255.81 102 0078228 00065391 MOSER PIRG Weld 37.880 3001.16 3.400 263.38 34,480 2.731,78 3,891 0 0 3.891 41.127 3891 000000% 0.8750 3400 269.38 104 0.079228 00076892 MOSER 10-31 Weld 46,900 371580 3,560 282.05 43,340 3,03375 4,074 0 0 4,074 50,920 4,074 0000000% 0.8750 3560 282.05 104 0.079228 00075792 MOSER FARMS4-1 Weld 19.250 1471.80 3,190 243.90 16,060 1,227.90 3079 0 0 3,649 20,900 3,649 0000000% 0.8750 3190 243.90 118 0076457 00075602 MOSER FARMS 4-2 Weld 19,250 147180 3.260 24925 15,990 1222.55 3,720 0 0 3,720 20,900 3720 0000000%% 0.8750 3260 249,25 118 0.076457 04289386 MUIRHEAD 1-1 Weld 19.060 1517.98 3,440 27397 15,620 1,244.01 3,931 0 0 3,931 20.694 3931 0073000% 08750 3440 27397 138 0.079642 04289486 MUIRHEAD 1-2 Weld 21.080 167886 3,560 283.53 17,520 1,395.33 4,063 0 0 4,063 22.887 4053 0070000% 08750 3560 283.53 138 0079602 00155687 MUIRHEAD 1-3 Weld 20,200 1600.76 3,190 254.06 17,010 1,354.70 3,648 0 0 3648 21,931 3848 0.000000% 0.8750 3190 25406 138 0.079642 01051896 MUIRHEAD 1-34 Weld 174,250 13877,62 6,360 506.52 167.890 13,371.10 5217 1,034 1,018 7,269 189,186 1269 0000LIX% 0.8750 6360 506.52 138 0.079642 00156087 MUIRHEAD 14 Weld 24,070 191698 4.490 35159 19,580 1559.39 5,133 0 0 5.133 28,133 5.133 0040740% 08750 4490_ 357.59 138 0.079642 00048091 MULVERY 22-1 Weld 34,130 2609.48 3.780 289.01 30,350 2320.47 4,318 0 0 4318 37.055 6318 0.000000% 0.8750 3780 289.01 118 0076#9 00171293 MYERS 14-21 Weld 30,800 2788.14 3,370 30507 27,430 2.48307 3.797 25 33 3,855 33,440 3855 00001:00% 08750 3370 30507 693 0.090524 csan2690 NICE.ROBERT 22-i Weld 14,580 111474 14 0 26072 11 170 854.02 3.898 0 0 3898 15,830 3.898 00000000% 08750 3410 260.72 118 007649 00119994 NIFS 15-14 Weld 53,910 4247.02 5.790 456.14 48.120 3,790.88 4,157 1.139 1.326 6,623 58.531 6,623 0 '0.0000% 0.8750 5790 456.14 558 0.07878 00136189 OGGC CARPIO 22-1 Weld 9.295 779.0/ 3,260 273.24 6.035 50584 3,723 0 0 3.723 18092 3.723 00101800°/. 00750 3260 27324 743 0083815 00136185 0000 GRUEN 22-0 Weld 9,295 77907 3.080 258 IS 6.215 52092 3.524 0 0 3524 10092 3,524 0.060600°/ 08750 3080 25815 743 0003816 Page 6 of 9 PRIMA OIL 8 GAS COMPANY PETITION FOR REFUND OF TAXES-1997 TAXES(1996 PRODUCTION YEAR) Original Assessed Direct Assessed Value Production Abate.I Refund Abate.I Refund Balance Operating Return on Return of Total Allowable Exempt Royally Assessment of Allowable Production Tax Schedule No Well Name County Value Original Tax Assessed Value Tax Assessed Value Balance Tax Expenses investment(ROI)Investment(Rofl)Deduction 95%Limitation Deductions Percentage Ratio Deduction Tax Refund District Tax Rate 00136189 OGGC GREEN 22-2 Weld 9295 77907 3,080 258.15 0215 520.92 3524 0 0 3,524 10,092 3,524 0.000000% 0.8750 3080 25815 743 0083816 00136189 OGGC OTTINGER 22-1 Weld 9295 77907 3,840 321.85 5.455 457.22 4,315 11 68 4393 10,092 4393 0000000% 0,8750 3840 321.85 743 0.083816 00064991 ORR 24-1 Weld 24,520 202376 2,370 19561 22,150 1828.15 2,347 151 214 2.712 26,622 2712 0000000% 08750 2370 195.61 543 0.082535 00118494 OSTER 15.11 Weld 64,970 5202.34 4.940 395.56 60,030 4,80678 3,954 816 870 5,640 70539 5,640 0PT?A0' % 08750 4940 395.56 520 0080073 00118794 OSTER 15-14 Weld 54.360 435276 5,050 404.37 49,310 3948,39 4,560 585 624 5.768 59,019 5,768 0000000% 08150 5050 404.3) 520 01180373 00010494 PHILLIPS 23-11 Weld 76.390 6148.40 4,570 367.83 71,820 5.780.57 4,213 008 545 5,226 82.938 5,226 0000000% 0.8750 4570 36783 556 0.080487 00010394 PHILLIPS 23-12 Weld 16.390 614840 4.320 347.70 72,070 5,500.70 4,217 334 388 4939 82938 0,939 0.000000% 0.8750 4320 347.70 556 0.080487 00010294 PHILLIPS 23-13 Weld 38460 792076 4,520 363.80 93,940 7.56096 4525 299 347 5.170 106,899 5.170 0000000% 0.8750 4520 363.80 556 0080487 00010594 PHILLIPS 23-14 Wee 83.580 6727.10 6,430 517.53 77,150 6,209.57 4,551 1,290 1,501 7,343 90744 7,343 0000 % 08750 6430 517,53 556 0.080487 00091395 PHILLIPS 24-21 Weld 96.750 7787.12 4,940 397.61 91810 7.38951 3,999 797 850 5,646 105.043 5646 0.000000% 08750 4940 397.61 557 0.080487 00091295 PHILLIPS 24-22 Weld 111080 894050 5,050 406.46 106,030 8,534.04 4,963 828 883 5,773 120,601 5.773 0.000000% 08750 5050 406,46 556 0.080487 00010694 PHILLIPS 2023 Weld 108480 081172 5.160 41531 104,320 8,39641 4,007 874 1,017 5,898 118,864 5,898 0000000% 0.8750 5160 415.31 556 0080487 00008794 PLATTE VALLEY 13-24 Weld 5230 4000.42 5,890 46999 44,340 3,53133 4,409 1074 1,250 6.734 54,535 6.734 0000008% 08750 5890 469.09 138 0.079642 00154/88 PLUSS 25-1 Weld 19,060 149102 3,100 24251 15.960 1,248.51 3,538 0 0 3538 20,694 3,538 00.CtlJ% 0.8750 3100 242.51 102 0.078228 00171893 PLUSS 32-03 Weld 33,400 2867.06 5,670 48671 27.730 2,380.35 4,576 835 1,068 6,479 36,263 6479 0.030000% 0.8750 5670 486.71 753 0.08584 00171193 QUICK 2113 Weld 2268° 2043.70 3.990 359.54 18690 1664.16 4,505 22 28 4.555 24,624 4,555 0010308% 0.8750 0301 359.54 644 009011 00062790 RADKE MD 22-1 Weld 23.660 180898 3.510 268.36 20,150 154062 3,887 45 81 4,013 25,688 0013 0.000000% 0,8750 3510 268.36 118 0076457 00310895 RIVER 61 Weld 1,870 164.36 1,010 6878 BW 15.50 307 432 410 1,150 2.030 1,150 001X0 1% 08750 1010 8875 697 0.037898 00089795 ROORIOUEZ 17-32 Weld 39340 3047.48 4,720 36563 34,620 2,68185 4,015 686 710 5,391 42,712 5,391 0.000000% 08750 4720 36563 220 0.077465 00387095 ROTHE II-1 Weld 42.560 4037.76 5,500 52180 37.060 3.51596 3856 1,175 1,253 6,284 46,208 6,284 00CCOC% 0.8750 5500 52180 446 0.094872 00086895 ROTHE I-14 Weld 59,070 5790.10 5,510 54010 53.560 5.250.00 3,889 1.164 1,241 6,294 64,133 6,294 0.003000% 0.8750 5510 640.10 445 0038021 04260586 ROUKEMA 5-1 Weld 54,790 4735.28 3,770 325.83 51020 4,409.45 4,156 21 135 4.312 59.486 4,312 0000000% 0.8750 3770 325.83 716 0086426 00164691 RYOGREN 81 Weld 15,290 1312.50 3.080 264.39 12.210 1048.11 3.524 0 0 3,524 16601 3,524 0000000% 08750 3080 261.39 742 0.08584 00241793 SAl I FE N-0RC Weld 2490 19830 2,370 188.75 120 955 4453 0 0 4453 2.703 2703 0.000000% 08750 2370 188.75 138 0.079642 00241893 SALLEE 14-2 Weld 39,590 3153.02 3,940 31379 35,650 2.83923 4500 0 0 4,500 42.983 4,503 000]000% 0.8750 3940 313.79 138 0079642 00241993 SALLEE 14-25 Weld 15200 1210.56 9,010 717,57 6,190 492.99 10,302 0 0 10,302 16,503 10,302 0 WUFO% 087 0 9010 717.57 138 0009642 00242093 SALLEE 14-3710 Weld 27790 2201.74 3,140 24878 24,650 1,952.96 3,585 0 0 3,585 30,172 3,585 0000000% 0.8750 3140 248.78 108 0079228 00039394 SALLEE I4-03 Weld 31690 2523.86 5,620 447.59 26070 2,07627 4,156 1.048 1.220 6425 34.406 6425 0.000000% 08750 5620 44759 138 0079642 04671586 SCHAAL 20-1 Weld 13,290 1074.04 1200 9698 12,090 977.06 1,368 0 0 1,369 14,429 1369 0.WlU03°% 08750 1200 96.98 2000 0.000815 04290186 SCHISSLER I4 Weld 46,720 410786 3,980 34994 42.740 3.757.92 3957 43 545 4,544 50,725 4,544 0.000000% 0.8750 3980 34994 718 0087925 00030895 SCHISSLER 141 Weld 55780 4927.54 4,170 368.37 51610 4,559.17 3,981 381 407 4,769 60,561 4,769 0000000% 0.0750 4170 368.37 749 0088339 00009494 SCHISSLER 400 Weld 61660 469874 5750 438.17 55,910 4260.57 3997 1,191 1386 6,514 66.945 6,574 000 00% 0.8750 5750 438.17 105 0.076204 04792986 SELBY I Weld 5.000 398.22 0 000 5.000. 398.22 0 0 0 0 5429 0 0000003s 08750 0 000 100 0,079642 00062890 SEYMOUR MENDELL 22.1 Weld 28030 214308 3,800 290.54 24.230 1.852.54 4,348 0 0 4,348 30,433 4,348 0 1c 0.8750 3800 290.54 118 0076457 00158791 SHEEPDRAW 911813-721 Weld 20.270 175836 0 000 20,270 1758.36 0 0 0 0 22601 0 0.000% 0.8750 0 000 429 0.066747 - 00107987 SHEEPDRAW NO 811819231 Weld 18,580 1485.00 0 000 18,580 148500 0 0 0 0 20,173 0 0000000% 08750 0 000 554 0.079925 01627286 SHEEPDRAW SO 83823-441 Weld 7,760 624.58 0 000 7.760 67458 0 0 0 0 8.425 0 7000000% 08150 0 000 556 0080487 00156087 SITZMAN 3-I Weld 13.760 1148.28 3650 305.93 10.050 44235 4,175 0 0 4.175 14 974 4.175 0600000% 08750 3650 30593 743 0083816 Page 7 of 9 PRIMA OIL&GAS COMPANY PETITION FOR REFUND OF TAXES-1997 TAXES(1996 PRODUCTION YEAR) Original Assessed Direct Assessed Value Production Abate./Refund Abate.I Refund Balance Operating Return on Return of Total Allowable Exempt Royalty Assessment of Allowable Production Tax Schedule No. Well Name County Value Original Tax Assessed Value Tax Assessed Value Balance Tax Expenses Investment(ROI)Investment(Roll)Deduction 95%Limitation Deductions Percentage Ratio Deduction Tax Refund District Tax Rate 01151992 ST PI Weld 11,330 972.56 940 50.69 10,390 891.87 1.078 0 0 1,078 12301 1,078 0.000000% 0.8750 940 80.69 742 008584 00072392 STATE 161 Wed 22,860 191604 3.250 272.40 19,610 164364 4,240 0 0 4,240 28,365 4.240 12.500000% 0.8750 3250 272.40 734 0093816 00167387 STATE 800TH 36-2 Wed 7,730 59860 2960 229.30 4,770 369.50 3,869 0 0 3,869 9592 3869 12500000% 0.8750 2960 229.30 221 0.027465 01051796 STATE CLARK 3621 Weld 115,800 9912.94 6410 548.72 109,390 9.36422 6,710 837 824 8,371 143.687 8,371 12500000% 08750 6410 548.72 671 0.085604 01088197 STATE CLARK 36-22 Weld 96,980 830188 5.370 4559.69 91,610 2,842.19 6,151 444 421 7,017 120,334 7,017 12.500000% 08750 5370 459.69 671 008504 01051596 STATE EHRLICH 3623 Wed 0 0.00 0 0.00 0 000 0 0 0 0 0 0 12.'500000% 00750 0 000 671 0.085604 01088097 STATE EHRLICH 36-23Y Weld 94680 810.98 5,150 440.86 89,530 7,664.12 4.897 924 910 6,731 117,480 6.731 12500700% 0.8750 5150 440.85 671 0.095604 01221196 STATE EHRLICH 36-32 Weal 176030 1394650 5,060 400.89 170.970 13.54561 4,811 903 895 6,615 218,421, 6615 12.5 % 08750 5060 403.89 108 0.079228 00148887 STATE FARM 36-06 Wed 21980 1908.74 2.780 241.42 19,200 1,667.32 3,633 0 0 3633 27,273 3.633 12.50:000: 0.8750 2280 24142 738 00050 00154688 STATE FARM 36-07 Wed 20.250 1758.52 2910 252.70 17,340 1,505.82 3806 0 0 3806 25,127 3,806 125000003. 0.8750 2910 25270 738 0.08684 00154580 STATE FARM 36-11 Wed 20,330 176546 2.850 247.49 17.480 151797 3.722 0 0 3.722 25,226 3.722 11500000% 08750 2850 24249 238 008684 00251387 STATE HOPPE 16-1 Wed 10,280 797.92 2.710 210.35 7,570 587.57 3,544 0 0 3,544 12,756 3,540 125969606 0.8750 2710 210.35 226 0.077619 00105890 STATE HOPPE 16-2 Weld 9.450 733.50 2.820 218.89 6,630 51461 3,688 0 0 3,688 11726 3,688 12.5000006 08750 2820 218.89 226 0077619 001055990' STATE HOPPE 16-3 Wed 12920 100284 2900 225.10 10.020 777.74 3.785 0 0 3.785 16,031 3.785 12.500800% 08750 2900 225.10 226 0077619 00167887 STATE SCHMIDT 36-03 Wed 19.510 1715.42 2.840 24971 16670 1,465.71 3,710 0 0 3,710 24,208 3710 12500000% 0.8750 2840 249.71 718 0087925 00165487 STATE SCHMIDT 36-04 Weld 27,430 2184.58 3,090 24609 24.340 1938.09 4036 0 0 4,036 34.038 4036 125000.3% 08750 3030 24660 138 0.079642 00240993 STATE SCHMIDT 36-05 Wed 16020 1408.56 9.020 793.08 7.003 615.48 11,534 47 200 11,781 19.816 11,781 12503009% 0.8750 9020 793.08 718 0.087925 00155788 STATE SCHMIDT 36-08 Weld 17,900 1418.16 8,750 69325 9.150 724.90 11.188 67 171 11,426 22,211 11,426 12.503300% 08250 8750 693.25 509 0.079228 00240893 STATE SCHMIDT 36-09 Wed 19,570 1720.70 3.330 29229 16,240 1,427.91 4,354 0 0 4,354 24.283 4.354 12500000% 08750 3330 292.79 218 0.087925 00240793 STATE SCHMIDT 3610 Weld 17,190 151144 2.670 234.16 14,520 1,27668 3489 0 0 3489 21330 3089 12500030% 08750 2620 234.76 718 0087925 00114289 STATE SCHMIDT 3612 Weld 20.790 1647.16 5980 473.78 14.810 1,173.38 7.745 20 51 7.815 25,797 7.815 12.500000% 0.8750 5980 42378 108 0.079228 00086695 STEPHENS 7-11 Weld 102,560 8096.78 7,080 614.17 95,480 8,282.61 6.266 884 942 8,092 111,351 8,092 00030877. 08750 7080 614.17 429 0050747 00086595 STEPHENS 7-12 Weld 124.360 10787.85 6,590 571.66 117,770 10,21620 5,934 773 825 7.531 135,019 1,531 0960000% 08750 6590 571.66 429 0.086747 01051696 STEPHENS 7-14 Wed 205,800 20180.56 4.660 456.78 201.220 19,72378 4,193 570 561 5,324 223,527 5,324 080001% 08750 4660 456.78 445 0.098021 04284686 STEWART 30IRC Weld 36,820 321582 3,440 303.45 33,380 2915.37 3934 0 0 3934 39976 3934 0.003000% 0.8750 3440 300.45 748 0.002339 00154888 STEWART 30-2 Wed 19.950 174242 3,240 282.98 16,710 1459.44 3,704 0 0 3.704 21.660 3,704 0960000% 0.8750 3240 262.98 748 0.087339 00152290 STOCKOVER 16-1 Weld 11.680 906.58 3310 256.92 8.370 64966 3.777 0 0 3.777 12,681 3,777 OWJGq% 08250 3310 256.92 226 0.077619 00305994 STOUT 9-4 Weld 37280 330576 3.790 331.63 33.990 2924.14 3,621 331 385 4,337 41.018 4,337 0.000000% 08750 3790 33163 684 0.0875 00172393 STROH 24-21 Weld 26,800 2223.04 3.620 300.28 23,180 1922.76 2,325 774 990 4,138 29.097 4,138 0000013% 0.8750 3620 300.28 552 0082949 00272194 STROH 24-22 Wed 26,810 2223.86 3,090 256.31 23.720 196755 2.375 505 646 3527 29.108 3.527 000003% 08750 3090 256.31 552 0002949 00268588 SULLIVAN 3-1 Wed 13,370 103776 0 000 13.370 1,037.76 0 0 0 0 14,516 0 0.000300% 0.8750 0 000 226 0077619 0dN6. 495 SWAFFORD II-11 Weld 66,630 632132 4.850 460.13 61.180 5,861.19 3933 729 831 5.542 72,341 5,542 0000000% 0.8750 0850 460.13 446 0030072 01151492 SWANSON 2821 Wed 10,160 288.60 1200 93.14 8.960 695.46 490 451 427 1.368 11,031 1.368 00000.4% 08750 1200 93.10 226 0072619 00221294 SWANSON 2&24 Wed 34,020 2640.60 4960 38499 29060 2,255.61 3.672 921 1,071 5664 36,936 5664 0.000000% 0.8760 4960 384.99 226 0077619 01151297 SWANSON 2459 Weld 8480 23562 1,160 100.63 7320 634.99 449 450 427 1.326 9.207 1,326 000WO3% 08750 1160 10063 430 0.086747 0022184 SWANSON 29-14 Weld 33.970 294680 4680 405.98 29290 2,540.82 3,653 782 910 5345 36,802 5,345 0.000003% 08250 4580 405.98 430 0086747 01332386 TIGGES 31-08 Wed 10,670 925.60 3.100 268.92 2,90 656.68 3,537 0 0 3.537 11,585 3.537 000000% 08250 3100 268.92 430 0086747 01333686 TIGGES 31-19 Wed 7,450 64626 3.120 27065 4.330 32561 3567 _ 0 0 3567 0080 3667 00%1000% 08750 3120 270.66 430 0086747 Page 8 of PRIMA OIL&GAS COMPANY PETITION FOR REFUND OF TAXES-1991 TAXES(1996 PRODUCTION YEAR) Original Assessed Direct Assessed Value Production Abate.I Refund Abate.I Refund Balance Operating Return on Return of Total Allowable Exempt Royalty Assessment of Allowable Production Tax Schedule No. Well Name County Value Original Tax Assessed Value Tax Assessed Value Balance Tax Expenses Investment(Roll Investment(Ron)Deduction 95%Limitation Deductions Percentage Ratio Deduction Tax Refund District Tax Rate 00314295 TODD 9-1 Weld 15.530 1230.42 3.320 26304 12210 967.38 3,798 0 0 3.798 16,061 3,798 0.000%0% 0.8750 3320 263.04 104 0079228 00314395 TODD 9-12 Weld 43,960 3482.86 5.500 435.75 38,460 304]11 3,804 1086 1,390 6.281 47.728 6.281 0000000% 0.8750 5500 435.75 104 0.079228 09054095 TOLLGATE 29-12 Weld 35.030 2713.70 3,870 299.76 31.160 2413.94 2.430 961 1,025 4,425 38033 4425 0000030% 08750 3870 299.76 121 0.077457 00114389 TWO ERANCH 7-1 Weld 20,780 1730.24 3.190 265.62 17,590 1.46462 3,614 0 0 3,644 22,561 3,644 0.00000% 0.8750 3190 265.62 730 0083265 00153387 ULRICH 21-1 Weld 22.810 1807.22 3.220 255.11 19,590 1552.11 3,679 0 0 3.679 24,765 3,679 0.0000056 08750 3220 255.11 108 0079228 00152087 URLICH 21-2 Weld 31,740 251470 3.420 270.96 28,320 2,243.74 3.904 0 0 3,904 34,461 3,904 000'0030% 08750 3420 27096 108 0079228 00052795 VANNOY 11-41 Weld 32,890 2547.82 5490 425.28 27,400 2.122.54 3,782 1,208 1,289 6,279 35,703 6.279 0.000000% 0.8750 5490 425.28 221 0.077465 01235586 VOGLER 1-1 Weld 980 75.92 270 20.92 710 5500 307 0 0 307 1004 307 0.000300% 0.8750 270 20.92 220 0.077465 00272294 WADDLE 30-44 Weld 57.590 4460.74 5,490 425.24 52.100 !035.50 4,060 973 1,245 6,278 62526 6.270 0.000000% 0.8750 5490 425.24 121 0.077457 00193190 WAGNER 10-1RC Weld 65.220 5194.26 3,830 305.03 61,390 4,839.23 4,200 49 124 4,303 70,810 4,383 0.000000% 08750 3830 305.03 138 0.079642 00008694 WALKER 4-24 Weld 73,500 5853.68 5.770 459.53 67,730 5,394.15 3,908 1,242 1,445 6,595 79.800 6.595 000.000% 0.8750 5770 459.53 138 0079642 000007894 WARDELL 20-41 Weld 58,510 4383.50 6490 484.00 52,020 3,879.50 4.601 1,303 1.517 7,421 63.525 7.421 00000:0% 0.8750 6490 484.00 129 0.074577 000000%4 WARDELL 20-44 Wed 65170 4860.18 5,370 40048 59.800 !459.70 4,496 756 880 6.131 70.756 6.131 0.000000% 0.8750 5370 400.48 129 0.074577 00065995 WARDLAW 3521 Weld 50,620 4242.76 5.410 453.44 45,210 3,789.32 3,762 1,173 1,251 6,186 54,959 6,186 000300% 0.8750 5410 453.44 743 0.083816 00089195 WARDLAW 35-22 Weld 65950 552766 3.620 30341 62.330 5.224.25 3,735 198 211 4,143 71603 4.143 0000000% 0.8750 3620 303.41 743 0.083816 00354495 WARDLAW 35-23 Weld 18.190 152462 5.720 479.43 12470 1,045.19 3,742 1,291 1,502 6.536 19,749 6.536 0.000000% 08750 5720 47943 743 0.083816 00134289 WEIDENKELLER I-1 Wed 20.160 1805.58 3,210 255.65 16.950 1,349.93 3,663 0 0 3,863 21,888 3.663 0.000000% 0.8750 3210 255.65 138 0.079642 00134389 WEIDENKELLER 1-2 Weld :4,480 2746.06 3.510 279.54 30,970 2.466 52 4,007 0 0 4,007 3]435 4.007 0.Wa.CO' % 0.8750 3510 279.54 138 0079842 001]2193 WEIDENKELLER 1-22 Weld 50,160 3994.84 4.230 338.89 45,930 3,657.95 3,886 414 529 4829 54,459 4,829 008%00% 0.8750 4230 336.89 138 0.0]9642 00387795 WESTERN SUGAR 4-43 Weld 94,570 8235.72 5,450 474.62 89.120 7.761.10 4.449 780 99B 6,227 102676 6,227 0006000% 08750 5450 474.62 604 0.087086 00064791 NEMECN 29-1 Wed 21.290 1584.68 2,060 153.33 19,230 1,431.35 2,359 0 0 2,359 23.115 ?359 0.000300% 0.8750 2060 153.33 106 0.074433 00064891 WIEDEMAN 29-2 Weld 21.980 1638.04 2,130 158.54 19,850 1,477.50 2,436 0 0 2436 23,864 2.436 0000300% 0.8750 2130 158.54 1% 0.074433 00364791 WIEOEMAN 293 Weld 212 4.03 90 158 2.040 151.84 19,250 1432.84 2.326 0 0 ?326 23,115 2.326 0.0000000% 08750 2040 15184 106 0074433 00010194 WIEDEMAN G 21-11 Weld 62.090 499744 4,840 33956 57,250 4,607.88 4,018 700 815 5,533 67,412 5,533 0000300% 0.8750 4840 389.56 556 0.080487 04262186 WILMOTH 6-2 Weld 50,230 4361.98 3,450 299.60 46,780 4,992.38 3,939 0 0 3,939 54.535 3.939 00.0000% 0.8750 3450 299.60 738 0.08684 04262086 WILMOTH 6-3 Wed 14620 1269.6 3.230 240.49 11,390 989.11 3.691 0 0 3391 15.873 3,691 0000900% 08750 3230 280.49 738 008684 04680686 WILSON 111 Weld 15,780 1263.56 0310 265.04 12470 998.52 3700 0 0 3,780 17.133 3,780 0.000000% 0.8750 3310 265.04 520 0.08073 01332786 WINDER 2-19 Wed 17610 152762 3,590 31142 14.020 1,216.20 4,097 0 0 4098 19.119 4.098 0.000000% 0.8750 3590 311.42 430 0.006]4] TOTAL WELD COUNTY 13,796.760 1,129,540.14 1.382.900 113,048.30 12413,860 1,018,49184 1380,857 103,996 118,769 1.603.622 15,109.042 1,566,435 1384.860 113,140.21 Page 9 of 9 PRIMA OIL IS GAS COMPANY 1996 Direct Operating Expenses DIRECT OPERATING EXPENSES TOTAL DIRECT Pumpers @ Hot Oil Equipment Rentall Flowline Overhead @ OPERATING Well Name County 80.6% Water Disposal Treatment Non Pumping Compressor Rental Maintenance 20% EXPENSES ALLISON 24-1RC Weld 2,370 1,069 199 0 0 0 1.155 4,792 ALLISON 24-2RC Weld 2.370 1.048 0 631 0 4,235 1,155 9,438 ALLISON 24-3 Weld 2,370 476 0 0 0 0 1,105 3.951 AMEN#1 Weld — 2,370 216 0 0 0 0 1,155 3,740 AMIGO 17-12 Weld 2,370 550 0 0 0 0 1,155 4,074 AMIGO 17-24 Weld 2,370 253 0 0 0 0 1,155 3,777 ANDERSON 4-44 Weld 395 139 0 0 0 0 196 730 API 24-1 RC Weld 2,370 2,514 0 0 0 0 1,155 6,038 API 24-22 RC Weld 2,370 1,187 0 0 0 0 1,155 4,711 API 24-24 Weld 395 588 0 0 0 0 196 1,179 API 24-34 Weld 592 390 0 0 0 0 293 1,276 API 24-42 Weld 2,370 2.171 202 1,800 0 0 1,155 7,698 APPOLLO#1 Weld 2.370 337 223 0 0 0 1,155 4.084 _ ARISTOCRAT 11-1 Weld 2,370 192 0 0 0 0 1,155 3,716 ARISTOCRAT 11-2 Weld 2,370 193 0 0 0 0 1,155 3,718 ARISTROCRAT 11-21 Weld 2,370 94 0 0 0 0 1,155 3,618 ARISTROCRAT 11-24 Weld 2,370 94 0 0 0 0 1.155 3,618 ARTIST ii-i2 Weld 2.370 390 0 0 0 0 1.155 3,914 BAIER 25-11 Weld 2,370 394 0 0 0 0 1,155 3,918 BARNARD 4-22 Weld 2,370 715 0 0 0 0 1,155 4,239 BARNARD 4-23 Weld 2,370 730 0 0 0 0 1,155 4,255 BAUER 9-1 Weld 2,370 611 Cl‘ 0 0 0 1,155 4,136 BEEBE DRAW 11-1 Weld 2,370 137 0 0 0 0 1,155 3,661 BEEBE DRAW 11-2RC Weld 2.370 114 0 0 0 0 1,091_ 3,575 BEELER#1 Weld 2,370 369 0 0 0 0 1,155 3,893 BEITMAN 4-1 Weld 2,370 45 0 0 0 0 1,155 3,569 BERNHARDT 1-11 Weld 2,370 236 0 0 0 0 1,155 3,760 BERNHARDT 1-12 Weld 2,370 237 0 0 0 0 1,155 3,761 BERNHARDT 13-12 Weld 2,370 329 0 0 0 0 1,155 3,853 BERNHARDT 13-14 Weld _ 2,370 370 0 0 0 0 1,155 3,894 BERNHARDT 7-31 Weld 2,370 456 0 0 0 0 1,155 3,980 BETZ#1 Weld 2,370 659 101 0 0 943 1,155 5,227 BETZ 9-14 Weld 2,370 667 0 0 0 1,024 1,155 5,216 BETZ 9-44 Weld 2,370 672 0 0 0 1,024 1,155 5.221 BICKLING 3-41 Weld 2,370 251 0 0 0 0 1,155 3.775 BICKLING 3-42 _Weld 2370 226 0 0 0 0 1,155_ 3,751 - BICKLING 3-44 Weld _ 2.370 213 0 0 0 0 1.155 3738 BOHLENDER I3-1RC Weld 2370 1.734 0 0 0 0 1155 5,258 Page 1 of 9 PRIMA Oil&GAS COMPANY 1996 Direct Operating Expenses DIRECT OPERATING EXPENSES TOTAL DIRECT Pumpers @ Hot Oil Equipment Rental/ Flowline Overhead @ OPERATING Well Name County 80.6% Water Disposal Treatment Non Pumping Compressor Rental Maintenance 20% EXPENSES BOHLENDER 29-13 Weld 2,370 519 0 0 0 0 1.155 4,044 BOHLENDER 33-02 Weld 2.370 538 0 0 0 0 1,155 4,063 BOHLENDER 33-03RC Weld 2,370 2.539 0 0 0 0 1,081 5,990 BOHLENDER 33-05 Weld 2.370 282 56 0 0 760 1,155 4,621 BOHLENDER 33-06 Weld 2,370 286 56 0 0 760 1,155 4,625 BOHLENDER 33-07 Weld 2.370 287 56 0 0, 760 1,155 4,627 BOHLENDER 33-22RC Weld 2,370 3.431 423 0 0 906 1,081 8.210 BOOTH 25-11 Weld 2,370 475 0 0 0 0 1,155 3,999 BOOTH 25-12 Weld 2,370 492 0 0 0 0 1,155 4,017 BOOTH 25-14 Weld 2,370 496 0 0 0 0 1.155 4,020 BOULTER 31-2 Weld 2,370 67 0 0, 0 0 1,155 3,591 BOULTER io-1 Weld 2,370 437 0 0 0 0 1,155 3.962 BOULTER 10-41 Weld 2,370 560 0 0 0 0 1,155 4,084 BOULTER 10-43 Weld 2.370 288 0 0 0 0 1,155 3,813 BOULTER 11-1 Weld 2,370 311 0 0 0 0 1,096 3,776 BOULTER 31-1 Weld 2,370 105 176 0 0 0 1,155 3,806 BRIGGS 1-11 Weld 2,370 704 0 0 0 0 1,155 4,228 BRIGGS 1-12 Weld 2.370 584 0 0 0 0 1,155 4,108 BRIGGS 1-14 Weld 2,370 640 0 0 0 0 1155 4,164 BROWN 3-14 Weld 2.370 359 0 0 0 0 1,155 3,883 BRUNNER 14-1 Weld 2.370 504 0 0 0 0 1,155 4,029 BURKE 24-1 RC Weld 2,370 2,366 179 0 7.110 0 944 12,968 BURKE 24-2RC Weld 2,370 1,557 0 0 6.030 0 944 10,900 BURKE 24-3 Weld 2.370 104 0 0 0 0 1,096 3,569 BURKE 24-35 Weld 1,382 160 98 0 591 3,332 685 6,249 CARLSON 10-1 Weld 2,370 35 0 0 0 0 1,155 3,559 CARPIO 22-41 Weld 2.370 81 0 0 0 0 1,155 3.605 CECIL 23-13 Weld 2.370 342 442 0 0 0 1,155 4.308 CHAMPLIN 23-3 Weld 2,370 225 390 0 0 0 1,155 4.139 CHRISTIANSEN 1-35 Weld 2.370 1,372 1.138 200 0 0 1.155 6,235 COBB 6-23 Weld 2.370 226 0 0 0 0 1,155 3.750 COCKROFT 11-23 Weld 2,370 205 189 0 0 0 1,155 3,918 - COLLINS 1-1 Weld 2,370 65 0 0 0 0 1,155 3,589 CORNELIUS 11-22 Weld 2.370 447 0 0 0 0 1,155 3,971 CORNELIUS 11-23 weld 2370 449 0 0 0 0 1.155 3,973 _ _ COX 8-1 Weld 2.370 61 156 0 0 0 1.155 3,740 DECHANP-11 Weld 2.370 158 0 0 0 0 1,155 3,682 DECHANT 7-14 Weld 2.370 220 0 0 0 0 1,155 3,745 Page 2 019 PRIMA OIL&GAS COMPANY 1996 Direct Operating Expenses DIRECT OPERATING EXPENSES TOTAL DIRECT Pumpers @ Hot Oil Equipment Rental I Flowline Overhead @ OPERATING Well Name County 80.6% Water Disposal Treatment Non Pumping Compressor Rental Maintenance 20% EXPENSES DIETRICH 7-1 Weld 2370 772 506 0 0 0 1.155 4,803 DINGES 3-33 Weld 2370 362 202 0 0 0 1,155 4,088 DINNER 1-1 Weld 2,370 112 0 0 0 0 1,105 3,587 DINNER 1-14 Weld 2.370 1,120 101 0 0 0 1,155 4.745 DINNER 1-2 Weld 2,370 1,236 0 0 0 0 1.105 4,711 DINNER 1-3 Weld 2,370 1,039 101 0 0 0 1,105 4.615 DINNER 14-1 RC Weld 2,370 207 0 0 0 0 1,105 3,682 DINNER 1-42 Weld 2,370 1,377 0 200 0 0 1,155 5,101 DINNER 1-44 Weld 2,370 1.218 0 0 0 0 1,105 4,693 _ DINNER 15-1 RC Weld 2.370 58.653 295 0 0 0 1,155 62,472 DINNER 6-1 Weld 2,370 67 0 0 0 0 1,105 3,542 DINNER 6-2 Weld 2,370 341 0 0 0 0 1.105 3,816 _ DINNER 6-3 Weld 2,370 91 0 0 0 0 1,155 3.615 DOLL 23-1 Weld 2,370 114 199 0 0 0 1,155 3,838 DUNGAN#1 Weld 2370 0 0 0 0 0 1,155 3.524 EHRLICH 23-11 Weld 2,370 349 0 0 0 0 1,155 3,873 EHRLICH 23-14 Weld 2,370 291 0 0 0 0 1,155 3,815 EMC 36-1 Weld 2,370 158 115 0 0 0 1.192 3,834 EMC 36-2 Weld 2.370 85 315 0 0 0 1,192 3.961 ENGLISH 31-20 Weld 2,370 460 0 0 0 0 1,155 3,984 ERICKSON 543 Weld 2,370 468 284 0 0 0 1,155 4,276 FARAMIR FARMS 6-2 Weld 2.370 241 0 0 0 0 1,096 3.706 FARAMIR FARMS 6-1 RC Weld 2,370 390 0 0 0 0 1.096 3.855 FARAMIR FARMS 6-3 Weld 197 80 0 0 0 0 98 375 FARAMIR FARMS 6-32""` Weld 0 0 0 0 0 0 0 0 FARAMIR FARMS 6-34 Weld 395 320 0 0 0 0 196 910 FARAMIR FARMS 6-4 Weld 2,370 360 0 0 0 0 1,155 3,884 FERGUSON 35-1 Weld _ 2,370 676 0 0 0 0 1,105 4.151 FRANK 13-1 Weld 2.370 543_ 0 0 0 0 1,105 4,018 FRANK 13-21 Weld 395 164 0 0 0 0 196 754 FRANK 25-13 Weld 2.370 385 0 0 0 0 1,155 3.909 FRANK 32-23 Weld 790 460 0 0 0 303 1,155 2,708 FRANK 32-24 Weld 790 387 0 0 0 303 1,155 2,634 FRY 13-1 Weld 2,370 317 0 0 0 0 1,105 3,792 FRY 132 Weld 2,370 148 0 0 0 0 1,155 3.673 FRY 18-1 Weld 2,370 523 189 0 0 0 1,105 4,187 GILCREST TOWNSITE 21-34 Weld 2,370 2,312 0 1,600 0 0 1,155 7,437 __ GIICREST TOWNSITF 26-2 Weld 0 0 0 0 0 0 0 0 Page 3 of 9 PRIMA OIL&GAS COMPANY 1996 Direct Operating Expenses DIRECT OPERATING EXPENSES TOTAL DIRECT Pumpers @ Hot Oil Equipment Rental/ Flowline Overhead© OPERATING Well Name County 80.6% Water Disposal Treatment Non Pumping Compressor Rental Maintenance 20% EXPENSES GILL LAND 22-1 RC Weld 2,370 184 176 0 0 0 1,105 3,835 GILL LAND 22-3 Weld 2370 163 352 0 0 0 1,155 4,040 GOODHARD 22-1 Weld 2,370 0 0 0 0 0 1,192 3,562 GOZA 18-1 Weld 2,370 107 202 0 0 0 1,192 3,870 GREEN 17-33 Weld 2,370 492 0 0 0 0 1,155 4,016 GREENHEAD 18-11 Weld 2,370 205 0 0 0 0 1,155 3.729 GREENHEAD 18-12 Weld 2,370 206 0 0 0 0 1,155 3,730 GUNTHER 18-1 Weld 2370 128 0 0 0 0 1.155 3.652 GUNTHER 18-2 Weld 2,370 115 0 0 0 0 1,155 3,639 GURLEY 31-23 Weld 790 214 106 0 0 303 1,103 2,516 GURLEY 31-24 Weld 790 173 106 0 0 303 1,103 2,475 GUTTERSEN 5-1 Weld 2,370 66 202 0 0 0 1,155 3,793 HANKINS#1 Weld 2.370 0 0 0 0 0 1,155 3.524 HANKINS#2 Weld 2,370 0 0 0 0 0 1,155 3.524 HARLESS I7-1 Weld 2.370 134 0 0 0 0 0 2,504 HARLESS 17-2 Weld 2,370 105 0 0 0 0 1,155 3,630 HENRY 5-1 Weld 2,370 269 0 0 0 0 1,155 3.793 HENRY 5-2 Weld 2.370 198 0 U 0 0 1,155 3722 HENRY 5-3 Weld 2370 272 0 0 0 0 1,155 3.796 HENRY 5-4 Weld 2,370 200 0 0 0 0 1.155 3.724 HOLMAN 14-1 Weld 2,370 469 0 0 0 0 1,155 3,994 HOWARD 4-42 Weld 395 139 0 0 0 0 196 730 HOWELL 32-1 Weld 2,370 558 0 0 0 0 1,155 4.082 HOWELL 32-2 Weld - 2,370 508 0_ 0 0 0 1,155 4,032 HOWELL 32-23 Weld 2,370 1.188 0 0 0 0 1,155 4,712 HUWA 11-1 RC Weld 2,370 331 178 0 0 0 1,096 3,974 HUWA 11-2 Weld 2,370 345 0 0 0 0 1.155_ 3.869 JOHNSON 1-22 Weld 2,370 403 483 0 0 0 1,155 4,410 JOHNSON 22-11 Weld 2,370 0 0 0 0 0 1,155 3,524 JOHNSON 29-1 Weld 2.370 31 0 0 0 0 0 2,401 JURGENS 8-1 Weld 2,370, 169 0 0 0 0 1.155 3,693 JURGENS 6-2 Weld _ 2,370 333 0 0 0 0 1,155 3,857 KALLAS 4-42 Weld 2.370 733 0 200 0 0 1,155 4,457 KAMMERZELL 7-41 Weld 2.370 391 0 0 0 0 1,155 3,915 KAMMERZELL 742 Weld 2.370 402 0 0 0 0 1.155 3,927 KAMMERZELL 7-43 Weld 2,370 406 0 0 0 O 1,155 3,930 KAMMERZELL 7-44 Weld 2,370 401 0 0 0 0 1,155 3.925 KNAUB 4-1 Weld 2370 216 0 0 0 0 1155 3,741 Page 4 of 9 PRIMA OIL&GAS COMPANY 1996 Direct Operating Expenses DIRECT OPERATING EXPENSES TOTAL DIRECT Pumpers@ Hot Oil Equipment Rental/ Flowline Overhead @ OPERATING Well Name County 80.6% Water Disposal Treatment Non Pumping Compressor Rental Maintenance 20% EXPENSES KNAUB 4-32 Weld 2.370 219 0 0 0 0 1,155 3,743 -, KNAUB 5-1 Weld 2.370 384 0 0 0 0 1,105 3,859 KNAUB 5-12 Weld 2,370 495 0 0 0 0 1,105 3,970 LAND 31-01 Weld 2,370 0 0 0 0 0 1,155 3,524 LAND 31-01A Weld 2.370 0 0 0 0 0 1,155 3,524 ..- LAND 31-02 Weld 0 0 0 0 0 0 0 0 LAND 31-11 Weld 2,370 576 0 0 0 0 1,155 4,100 LAND 31-13 Weld 2.370 845 0 0 0 0 1,155 4,369 LATHAM#1 Weld 0 0 0 0 0 0 0 0 LATHAM 2-1 Weld 2,370 304 0 0 0 0 1,155 3,828 LATHAM 2-42 Weld 2.370 428 0 0, 0 1.031 1,155 4,982 LATHAM 2-43 Weld _ 2,370, 437 0 0 0 1,031 1,155 4,992 LATHAM 2-44 Weld 2,370 263 0 0 0 0 1.155 3,787 LATHAM 3-1 Weld 2,370 361 0 0 0 0 1,155 3.885 LATHAM 3-2 Weld 2,370 946 0 0 0 0 1.155 4,471 LATHAM 3-24 Weld 2,370 2,470 189 1,400 0 0 1,155 7,584 LATHAM 3-34 Weld 2.370 370 0 0 0 0 1,155 3,894 LEAMING 27-24 Weld 2,370 545 0 0 0 0 1,155 4,069 LINDBLAD 22-20 Weld 2,370 265 202 0 0 0 1,155 3,991 LOFLAND 22-42 Weld 395 251 118 0 0 0 196 959 LOFLAN022-43 Weld 395 338 118 0 0 0 196 1,047 LORENZ FARMS 22-13 Weld 197 223 317 0 0 0 98 835 LOUSTALET 154 Weld 2.370 167 0 0 0 0 1,155 3,691 LOUSTALET 30-1RC Weld 2,370 2,725 1.494 0 540 4,541 944 12,614 LOUSTALET 30-2RC Weld 2,370 678 81 0 1,080 1,041 685 5,935 LOUSTALET 30-3 Weld 2,370 847 0 150 12,7]2 1,041 1,155 18.334 LOUSTALET 304 _Weld 2.370 888 0 150 11,156 1.041 1,155 16.759 LUNDVALL 13-12 Weld — 2,370, 500 0 0 0 0 1,155 4,024 LUNDVALL 13-13 Weld 2,370 527 0 0 0 0 1,155 4,051 LUNDVALL 13-14 Weld 2.370 335 0 2.000 0 0 1,155 5,860 MARK 35-01 _Weld 2,370 251 0 0 0 0 1,155 3.775 MARK 35-02 Weld 2,370 273 0 0 0 0 1.155 3,797 MARK 35-11 Weld 2.370 407 0 0 0 0 1.155 3,931 MARK 35-13 Weld 2.370 314 0 0 0 0 1,155 3,838 MCCARTHY#1 Weld 2.370 1,582 0 0 0 0 1,027_ 4,979 MCCARTHY 6-33 Weld 2.172 1,856 391 1,600 0 0 1,061 7,079 MCCLELLAN 3-1 Weld 2.370 250 0 0 0 0 1,105_ 3.724 MCCLELLAN 332 Web 2,370 738 0 0 0 0 1,155 4,262 Page 5 o1 9 PRIMA OIL&GAS COMPANY 1996 Direct Operating Expenses DIRECT OPERATING EXPENSES TOTAL DIRECT Pumpers @ Hot Oil Equipment Rental/ Flowline Overhead @ OPERATING Well Name County 80.6% Water Disposal Treatment Non Pumping Compressor Rental Maintenance 20% EXPENSES MCCLELLAN 4-1 Weld 2370 595 0 0 0 0 1,096 4,061 MCCLELLAN 4-12 Weld 2,370 591 0 0 0 0 1,096 4,056 MCKENNEY 6-1 Weld 2,370 185 293 0 0 0 1,105 3,953 MCKENNEY 6-12 Weld 2,370_ 365 0 0 0 0 1,105 3,840 MCKENNEY 6-14 Weld 2.567 349 0 0 0 0 1,105 4,022 MCKENNEY 6-2 Weld 2,370 84 0 0 0 0 1,096 3,549 MCKENNEY 6-3 Weld 2,370 181 0 0 0 0 1.155 3,705 MCKENNEY 6-42 Weld 2.370_ 298 128 0 0 0 1,155 3,950 MCKENNEY 6-43 Weld 2,370 299 128 0 0 0 1,155 3,951 MCLEOD 29-01 Weld 790 136 0 0 0 303 1,155 2,384 MCLEOD 29-02 Weld 790 591 0 0 0 303 1,155 2,839 MCLEOD 29-13 Weld 790 259 0 0 0 303 1,155 2,506 MCLEOD 29-14 Weld 790 178 0 0 0 303 1,155 2.426 MCLEOD 29-41 Weld 790_ 253 0 0 0 303 1,155 2,501 MCMURREN 22-31 Weld 395 454 0 0 0 0 196 1,045 MCWILLIAMS#1 Weld 2.370_ 126 0 0 0 0 897 3,392 MCWILLIAMS#2 Weld 2.370 360 0 0 0 0 357 3,086 — MCWILLIAMS 15-32 Weld 2,370 152 0 0 0 0 897 3,419 MCWILLIAMS 15-34 Weld 2.370_ 380 0 0 0 0 897 3,647 M020-1 Weld 2.370_ 56 0 0 0 0 1,155 3,581 MD 20-2 Weld 2,370 43 0 0 0 0 1,155 3,567 MILLER 24-1 Weld 2,370 480 0 0 0 0 1.096 3.946 MILLER 24-iS Weld 2,370_ 217 0 0 0 0 1,155 3,741 MOSER#1RC Weld 2,370 367 0 0 0 0 1,155 3,891 MOSER 10-31 Weld 2,370_ 550 0 0 0 0 1.155 4,074 _ MOSER FARMS 4-1 Weld 2,370_ 176 0 0 0 0 1,103 3.649 MOSER FARMS 4-2 Weld 2.370_ 248 0 0 0 0 1,103 3,720 MUIRHEAD 1-1 Weld 2,370 456 0 0 0 0 1,105 3,931 MUIRHEAD 1-2 Weld 2370 588 0 0 0 0 1,105 4,063 MUIRHEAD 1-3 Weld 2,370 123 0 0 0 0 1,155 3.648 MUIRHEAD 1-34 Weld 2.370 1,493 0 200 0 0 1.155 5,217 _ MUIRHEAD 1-4 Weld 2,370 188 0 0 0 1,421 1.155 5,133 MULVERY 22-1 Weld 2,370 467 290 0 0 0 1.192 4,318 MYERS 14-21 Weld 2.370 273 0 0 0 0 1,155 3,797 NICE,ROBERT 22-1 Weld 2,370_ 159 178 0 0 0 1,192 3.898 NIES 15-14 Weld 2,370 345 163 125 0 0 1,155 4.157 OGGC CARPI027-1 Weld 2.370 199 0 0 0 0 1,155 3,723 OGGC GRUEN 22-1 Weld 2,370 0 0 0 0 0 1,155 3,524 Page 6 of 9 PRIMA OIL&GAS COMPANY 1996 Direct Operating Expenses DIRECT OPERATING EXPENSES TOTAL DIRECT Pumpers @ Hot Oil Equipment Rental I Flowline Overhead @ OPERATING Well Name County 80.6% Water Disposal Treatment Non Pumping Compressor Rental Maintenance 20% EXPENSES 0GGC GRUEN 22-2 Weld 2,370 0 0 0 0 0 1,155 3,524 0GGC 0TTINGER 22-1 Weld 2,370 603 188 0 0 0 1,155 4,315 0RR 24-1 Weld 790 99 0 0 0 303 1.155 2.347 OSTER 15-11 Weld 2,370 319 111 0 0 0 1,155 3,954 OSTER 15-14 Weld 2.370 321 715 0 0 0 1,155 4,560 PHILLIPS 23-11 Weld 2,370 689 0 0 0 0 1.155 4,213 PHILLIPS 23-12 Weld 2,370 692 0 0 0 0 1,155 4,217 PHILLIPS 23-13 Weld 2,370 906 95 0 0 0 1,155 4,525 PHILLIPS 23-14 Weld 2.370 933 95 0 0 0 1,155 4,551 PHILLIPS 24-21 Weld 2,370 475 0 0 0 0 1,155 3,999 PHILLIPS 24-22 Weld 2,370 538 0 0 0 0 1,155 4,063 PHILLIPS 24-23 Weld 2,370 483 0 0 0 0 1,155 4,007 PLATTE VALLEY 13-24 Weld 2,370 885 0 0 0 0 1,155 4,409 PLUSS 25-1 Weld 2,370 14 0 0 0 0 1,155 3,538 PLUSS 32-43 Weld 2,370 1.052 0 0 0 0 1,155 4,576 QUICK 21-13 Weld 2.370 486 495 0 0 0 1,155 4,505 RADKE MD 22-1 Weld 2,370 325 0 0 0 0 1,192 3,887 RIVER#1 Weld 197 12 0 0 0 98 307 RODRIQUEZ 17-32 Weld 2,370 490 0 0 0 0 1,155 4,015 ROTHE 11-1 Weld 2,370 332 0 0 0 0 1,155 3,856 ROTHE 1-14 Weld 2,370 365, 0 0 0 0 1,155 3,889 ROUKEMA 5-1 Weld 2,370, 631 0 0 0 0 1,155 4,156 RYDGREN 8-1 Weld 2,370 0 0 0 0 0 1,155 3,524 SAI I FE 14-1 RC Weld 2,370 599 0 0 540 0 944 4,453 SALLEE 14-2 Weld 2.370 495 0 0 540 0 1,096 4,500 SALLEE 14-2S Weld 2,370 655 0 0 6,123 0 1,155 10,302 _ SALLEE 14-3RC weld 2,370 271 0 0 0 0 944 3,585 SALLEE 14-43 Weld 2,370 632 0 0 0 0 1,155 4,156 SCHAAL 20-1 Weld 0 115 248 0 0 0 1.005 1,368 SCHISSLER 1-1 Weld 2,370 482 0 0 0 0 1,105 3.957 SCHISSLER 1-11 Weld 2,370 506 0 0 0 0 1,105 3.981 - SCHISSLER 4-14 Weld 2,370 473 0 0 0 0 1.155 3,997 SELBY 1 Weld 0 0 0 0 0 0 0 0 SEYMOUR MENDELL 22-1 Weld 2,370 564_ 223 0 0 0 1,192 4,348 SHEEPDRAW#1(#13-22) weld 0 0 0 0 0 0 0 0 SHEEPDRAW NO#1(#19-23) Weld 0 0 0 0 0 0 0 0 SHEEP0RAW SO#1023-44) Weld 0 Ol 0 0 0 0 0 0 SITZMAN 3,1 Weld 2,370 416 235 0 0 0 1,155 4,175 Page 7 of PRIMA OIL&GAS COMPANY 1996 Direct Operating Expenses DIRECT OPERATING EXPENSES TOTAL DIRECT Pumpers @ Hot Oil Equipment Rental I timeline Overhead @ OPERATING Well Name County 80.6% Water Disposal Treatment Non Pumping Compressor Rental Maintenance 20% EXPENSES ST#1 Weld 0 1,078 0 0 0 0 0 1,078 STATE 18-1 Weld 2,370 62 616 0 0 0 1,192 4,240 STATE B00TH 36-2 Weld 2,370 155 189 0 0 0 1,155 3,869 STATE CLARK 36-21 Weld 2,370 1586 0 1,600 0 0 1155 6,710 STATE CLARK 36-22 Weld 2,370 1,027 0 1,600 0 0 1,155 6,151 STATE EHRLICH 36-23 Weld 0 0 0 0 0 0 0 0 STATE EHRLICH 36-23Y Weld 2.370 1,373 0 0 0 0 1.155 4,897 STATE EHRLICH 36-32 Weld 2,370 1,073 0 213 0 0 1,155 4,811 STATE FARM 36-06 Weld 2,370 158 0 0 0 0 1,105 3.633 STATE FARM 36-07 Weld 2.370 331 0 0 0 0 1,105 3,806 STATE FARM 36-11 Weld 2.370 247 0 0 0 0 1,105 3,722 STATE HOPPE 16-1 Weld 2,370 20 0 0 0 0 1,155 3.544 STATE HOPPE 16-2 Weld 2,370 164 0 0� 0 0 1,155 3,688 STATE HOPPE 16-3 Weld 2.370 75 186 0 0 0 1,155 3,785 STATE SCHMIDT 36-03 Weld 2,370 235 0 0 0 0 1,105 3.710 STATE SCHMIDT 36-04 Weld 2,370 265 0 0 0 296 1,105 4,036 STATE SCHMIDT 36-05 Weld _ 2.370 313 0 0 0 7,747 1,105 11,534 STATE SCHMIDT 36-08 Weld 2,370 406 0 0 U 7,301 1,105 11,188 STATE SCHMIDT 36-09 Weld 2,370 376 0 0 0 504 1.105 4,354 l STATE SCHMIDT 36-10 Weld 2.370 14 0 0 0 0 1,105 3,489 STATE SCHMIDT 36-12 Weld 2.370 4,091 179 0 0 0 1,105 7,745 STEPHENS 7-11 Weld 2,370 542 0 2,200 0 0 1,155 6,266 STEPHENS 7-12 Weld 2,370 610 0 1.800 0 0 1,155 5,934 STEPHENS 7-14 Weld 2,370 668 0 0 0 0 1,155 4,193 STEWART 30-1RC Weld 2,370 620 0 0 0 0 944 3,934 STEWART 30-2 Weld 2,370 180 0 0 0 0 1,155 3704 STOCK0VER 16-1 Weld 2,370 98 156 0 0 0 1,155 3,777 STOUT 9-0 Weld 2,370 97 0 0 0 0 1,155 3,621 STROH 24-21 Weld 790 127 0 0 0 303 1,155 2,375 STROH 24-22 Weld 790 128, 0 0 0 303 1.155 2,375 SULLIVAN 3-1 Weld 0 0 0 0 0 0 0 0 SWAFF0RD 11-11 Weld 2,370 409 0 0 0 0 1,155 3,933 SWANSON 28-21 Weld 19/ 195 0 0 0 0 98 490 _ SWANSON 28-24 Weld 2.370 238 0 0 0 0 1,065 3,672 SWANSON 29-11 Weld 197 154 0 0 0 0 98 449 SWANSON 29-14 Weld 2,370 219 0 0 0 0 1,065 3,653 TIGGES 31-18 Weld 2,370 13 0 0 0 0 1,155 3,537 TIGGES 31-19 Weld 2,370 43 0 0 0 0 1.155 3,567 Page 8 of 9 PRIMA OIL&GAS COMPANY 1996 Direct Operating Expenses DIRECT OPERATING EXPENSES TOTAL DIRECT Pumpers @ Hot Oil Equipment Rental/ Flowline Overhead @ OPERATING Well Name County 80.6% Water Disposal Treatment Non Pumping Compressor Rental Maintenance 20% EXPENSES TODD 9-1 Weld 2,370 323 0 0 0 0 1105 3,798 TODD 9-12 Weld 2,370 329 0 0 0 0 1.105 3,804 TOLLGATE 29-12 Weld 790 190 0 0 0 303 1,155 2,438 _ TWO E RANCH 7-1 Weld 2.370 120 0 0 0 0 1,155 3,644 ULRICH 21-1 Weld 2,370 155 0 0 0 0 1,155 3,679 URLICH 21-2 Weld 2,370 379 0 0 0 0 1,155 3,904 VANNOY 1131 Weld 2,370 258 0 0 0 0 1.155 3,782 _ VOGLER 1-1 Weld 0 307 0 0 0 0 0 307 WADDLE 30-44 - Weld 2370 536 0 0 D 0 1,155 4,060 WAGNER10-1RC Weld 2,370 744 0 0 0 0 1,096 4,209 - WALKER 4-24 Weld 2.370 384 0 0 0 0 1,155 3,908 WARDELL 20-41 Weld 2,370 1,077 0 0 0 0 1.155 4.601 - WARDELL20-44 Weld 2,370 972 0 0 0 0 1,155 4,496 WARDLAW 35-21 Weld 2,370 237 0 0 0 0 1,155 3,762 WARDLAW 35-22 Weld 2,370 f 210 0 0 0 0 1.155 3,735 WARDLAW 35-23 Weld 2,370 210 0 8 0 0 1,155 3,742 WEIDENKELLER 1-1 Weld 2,370 189 0 0 0 0 1,105 3,663 WEIDENKELLER 1-2 Weld 2,370 533 0 0 0 0 1,105 4,007 WEIDENKELLER I-22 Weld 2.370 411 0 0 0 0 1.105 3.886 WESTERN SUGAR 433 Weld 2.370 821 103 0 0 0 1,155 4.449 WIEDEMAN 29-1 Weld 790 111 0 0 0 303 1,155 2,359 ' WIEDEMAN 29-2 Weld 790 189 0 0_ 0 303 1,155 2.436 WIEDEMAN 29-3 Weld 790 78_ 0 0 0 303 1.155 2,326 WIEDEMAN G 21-11 Weld 2.370- 493 0 0 0 0 1,155 4,018 WILMOTH 6-2 Weld 2,370- 414 0 0 0 0 1,155 3,939 WILMOTH 6-3 Weld 2.370_ 167 0 0 0 0 1.155 3.691 WILSON#1 Weld 2,370_ 66 189 0 0 0 1,155 3,780 WINDER 2-19 Weld 2370 187 386 0 0 0 1.155 4,097 TOTAL WELD COUNTY 701,216 206,781 16.691 17,676 46,481 45,598 346.414 1.380,857 Page 9 of 9 PRIMA OIL S GAS COMPANY HISTORICAL DETAIL COST HISTORICAL DETAIL COST BY CATEGORY HISTORICAL DETAIL COST BY YEAR H.T./ SEPARATORS/ VALVES MISC. PRODUCTION AND SURFACE TOTAL Well Name County TANKS UNITS FLOWLINES FITTINGS EQUIP. COSTS 1975 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 TOTAL ALLISON24-1RC Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ALLISON 24-2RC Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ALLISON 24-3 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 D 0 0 0 0 0 0 0 0 0 AMEN#1 Weld 1,750 11,177 810 4,642 0 18,378 0 0 18,378 0 0 0 0 0 0 0 0 0 0 0 0 0 18,378 AMIGO 17-12 Weld 5,843 10,918 847 4,393 386 22,388 0 0 0 0 0 0 0 0 0 0 0 0 0 22,388 0 0 22,388 AMIGO 17-24 Weld 5.843 10,918 2,726 4,001 232 23,720 0 0 0 0 0 0 0 0 0 0 0 0 0 23,720 0 0 23.720 ANDERSON 4-44 Weld 0 0 388 1,748 129 2,265 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2,265 2.265 .-- API24-1 RC Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 API 24-22 RC Weld 874 1,915 505 2,782 1,436 7,511 0 0 0 0 0 0 0 0 0 0 0 7,511 0 0 0 0 7,511 API 24-24 Weld 2.706 7,000 3.493 7,240 34 20,474 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 20,474 20,474 API 24-34 Weld 3,481 7,000 1,160 2,848 106 14,596 0 0 0 0_ 0 0 0 0 0 0 0 0 0 0 0 14,596 14,596 API24-42 Weld 0 0 2,474 9,036 447 11,957 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 11,957 11,957 APPOLLO#1 Weld 0 0 0 0 3 3 0 0 0 0 3 0 0 0 0 0 0 0 0 0 0 0 3 ARISTOCRAT 11-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ARISTOCRAT 11-2 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - ARISTROCRAT 11-21 Weld 2.937 0 1,279 5,183 0 9,399 0 0 0 0 0 0 0 0 0, 0 0 9.399 0 0 0 0 9,399 ARISTROCRAT 11-24 Weld 5.821 0 1,124 351 3 7,299 0 0 0 0 0 0 0 0 0 0 0 7,299 0 0 0 0 7,299 ARTIST I1-12 Weld 2675 5.459 878 2,202 2185 13,399 0 0 0 0_ 0 0 0 U 0 0 0 0 0 13.399 0 0 13,399 BAIER 25-11 Weld 453 4,378 2,439 2,481 1,257 11,007 0 0 0 0 0 0 0 0 0 0 0 0 11,007 0 0 0 11,007 BARNARD 4-22 Weld 5.895 11.186 940_ 6,003 232 24.255 0 0 0 0 0 0 0 0 0 0 0 0 0 24,255 0 0 24,255 _ BARNARD 4-23 Weld 0 0 1,203 1,026 232 2,460 0 0 0 0 0 0 0 0 0 0 0 0 0 2.460 0 0 2,460 _ BAUER9-1 Weld 0 0 0 0 0 0 0 0 0 0_ 0 0 0 0 0 0 0 0 0 0 0 0 0 BEEBE DRAW 11-1 Weld 0 0 0 0 2 2 0 0 0 0 0 0 2 0 0 0 0 0 0 0 0 0 2 BEEBE DRAW 11-2RC Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 BEELER#1 Weld 1,400 0 0 0 3 1,403 1.403 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1,403 BEITMAN4-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 BERNHARDT 1-11 Weld 3,107 3,498 991 1,301 1,310 10,205 0 0 0 0 0 0 0 0 0 0 0 0 10,205 0 0 0 10,205 f BERNHARDT 1-12 Weld 4,909 3.498 991 939 1.413 11,749 0 0 0 0 0 0_ 0 0 0 0 0 0 11.74P 0 0 0 11.749 — _ BERNHARDT 13-12 Weld 5.609 11,292 1,467 3.587 1,276 23.231 0 0 0 0 0 0 0 0 0 0 0 0 0 23,231 0 0 23,231 BERNHARDT 13-14 Weld 1.500 11,292 1.461 5,339 747 20,339 0 0 0 0 0 0 0 0 0 0 0 0 20,339 0 0 0 20,339 BERNHARDT 7-31 Weld 601 3.708 313 8.104 0 12,726 0 0 0 0 0 0 0 0 0 0 0 0 12,726 0 0 0 12,726 BETZ#1 Weld 0 0 0 0 0 0 0 0- 0 0, 0 0' 0 0 0 0 0 0 0 0 0 0 0 BETZ9-14 Weld 0 0 3.356 1,330 0 4,685 0 0 0 0 0 0 0 0 0 0 0 0 4,685 0 0 0 4,685 BETZ9-44 Weld 0 0 0 537 0 537 _ 0 0 0 0_ 0 0 0 0 0 0 537 0 0 0 0 0 537 BICKLING 3-41 _Weld 5 899 6 288 1.766 4,822 227 19.002 0 0 0 0_ 0 0 0 0 0_ 0_ 0 0 0 19,002 0 0 19,002 BICKLING 3-42 _Weld 2.805 0 2.931 1,918 232 7,885 0 U 0 0 0 0 0 0 0 0 0 0 7,865 0 0 7.885 BICKLING 3-44 Weld 2.805 0 806 1.924 973 6,507 0 0 0 0 0 0 0 0 0 0 0 0 6.50] 0 0 6,507 SOHLENDER 13 1RC Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Page 1 of 9 PRIMA OIL&GAS COMPANY HISTORICAL DETAIL COST HISTORICAL DETAIL COST BY CATEGORY HISTORICAL DETAIL COST BY YEAR HT,/ SEPARATORS/ VALVES MISC. PRODUCTION AND SURFACE TOTAL Well Name County TANKS UNITS FLOWLINES FITTINGS EQUIP. COSTS 1975 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 TOTAL BOHLENDER 29-13 Weld 899 0 3,553 3,814 825 9,091 0 0 0 0 0 0 0 0 0 0 0 9.091 0 0 0 0 9,091 BOHLENDER33-02 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 _ BOHLENDER33-03RC Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 BOHLENDER 33-05 Weld 0 0 0 0 0 0 _ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 BOHLENDER 33-06 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 _ BOHLENDER33-0 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 BOHLENDER 33-22RC _Weld 0 0 0 75 0 75 0 0' 0 0 0 0 0 0 0 0 75 0 0 0 0 0 75 BOOTH 25-11 Weld 2,214 3,841 1,479 2,421 227 10,182 0 0 0 0 0 0 0 0 0 0 0 0 10.182 0 0 0 10,182 BOOTH 25-12 Weld 2,215 3,841 2,745 4,711 227 13.738 0 0 0 0 0 0 0 0 0 0 0 0 0 13.738 0 0 13,738 BOOTH 25-14 _Weld 2,215 3,841 1,644_ 3.747 227 11,673 0 0 0 0 0 0 0 0 0 0 0 0 0 11.673 0 0 11,673 BOULTER 31-2 Weld 0 0 0 0 0 0 0 0 0 0 O 0 0 0 0 0 0 0 0 0 0 0 0 BOULTER 10-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 BOULTER 10-41 Weld 0 0 868 0 0 868 0 0 0 0 0 0 0 0 0 0 868 0 0 0 0 0 868 BOULTER 10-43 Weld 0 0 0 0 226_ 226 0 0 0 0 0 0 0 0 0 0 226 0 0 0 0 0 226 BOULTER 11-1 Weld 0 0 0 0 0 0 _ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 BOULTER31-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 BRIGGS 1-11 Weld 1,288 2.918 2,126 6,142 1,363 13,836 0 0 0 0 0 0 0 0 0 0 0 0 13,836 0 0 0 13,836 BRIGGS 1-12 Weld 38 2918 1.418 5,935 0 10,309 0 0 0 0 0 0 0 0 0 0 0 0 10,309 0 0 0 10,309 _ BRIGGS 1-14 Weld 2,199 2,918 1,809 6,946 412 14.284 0 0 0 0 0 0 0 0 0 0 0 0 14,284 0 0 0 14,284 BROWN 3-14 Weld 7.700 10,918 451 6.634 628 26,331 0 0 0 0 0 0 0 0 0 0 0 0 0 26.331 0 0 26.331 BRUNNER 14-1 Weld 0 0 0 0 0 0 0 0 0 0 0_ 0 0 0 0 0 0 0 0 0 0 0 0 _ BURKE24-1RC Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 BURKE 24-2RC Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 BURKE24-3 Weld 0 833 0 0 0 833 0 0 0 0 0 0 833 0 0 0 0 0 0 0 0 0 833 BURKE 24-3S Weld 0 0 0 0_ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - CARLSON 10-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 CARPIO 22-41 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 l CECIL 23-13 Weld 5,898 10,918 531 3,751 696 21,795 0 0 0 0 0 0 0 0 0 0 0 0 0 21.795 0 0 21,795 f CHAMPLIN 23-3 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 CHRISTIANSEN 1-35 Weld 4,303 6,853 372 2,759 22 14,308 _ 0 0 0 0 0 0 0 0 0 0 0 14,308 0 0 0 0 14,308 COBB 6-23 Weld 3,371 0 344 3,826 962 8,503 0 0 0 0 0 0 0 0 0 0 0 8,503 0 0 0 0 8,503 COCKROFT 11-23 Weld 5.794 9,316 1 491 3,934 227 20,761 0 0 0 0 0 0 0 0 0 0 0 0 0 20,761 0 0 20,761 COLLINS 1-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 CORNELIUS 11-22 Weld 3,076 5.594 713 2,518 265 12.165 0 0 0 0 0 0 0 0 0 0 0 0 0 0 12.165 0 12,165 CORNELIUS 1123 Weld 3.075 5:594 713 2.523 232 12.137 f 0 0 0 0 0 0 0 0 0 0 0 0 0 12,137 0 0 12.137 —COX 8-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 U U 0 0 0 0 0 0 0 0 0 DECHANT 7-11 Weld 0 0 0 0 0 0 U 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 DECHANT7-14 Weld 0 0 0 0 0 0 0 D 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Page 2 of 9 PRIMA OIL S GAS COMPANY HISTORICAL DETAIL COST HISTORICAL DETAIL COST BY CATEGORY HISTORICAL DETAIL COST BY YEAR H.T./ SEPARATORS/ VALVES MISC. PRODUCTION AND SURFACE TOTAL Well Name County TANKS UNITS FLOWLINES FITTINGS EQUIP. COSTS 1975 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 TOTAL DIETRICH 7-1 Weld 0 0 0_ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 DINGES 3-33 Weld 5,898 10918 635 5.979 232 23,661 0 0 0 0 0 0 0 0 0 0 0 0 0 23.661 0 0 23,661 .- DINNER 1-1 _Weld 0 D 0 0 0 0_ _ 0 0 0 0� 0 0 0 0 0 0 0 0_ 0 0 0 0 0 DINNER1-14 Weld 301 10,049 1,488_ 4,839 0 16,677_ 0 0 0 0 0 0 0. 0 0 0 0 0 0 D 16,677 0 16,677 DINNER 1-2 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 DINNER1-3 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 DINNER 14-1RC Weld 0 0_ 0 0 0 0 _ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 DINNER i-02 Weld 0 0 1,940 3,234 118 5.293 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5,293 0 5,293 DINNER 1-44 Weld 0 995 1,499 2,930 1,336 6,761 0 0 0 0 0 0 0 0 0 0 0 0 6,761 0 0 0 6,761 DINNER15-1RC Weld 0 0 0 0 278 278 0- 0 278 0 0 0 0 0 0 0 0 0 0 0 0 0 278 DINNER6-1 Weld 0 0 O 0, 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 DINNER 6-2 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -. DINNER6-3 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 DOLL23-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 DUNGAN#1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 EHRLICH 23-11 Weld 437 0 1,637 2.736 231 5,041 0 0 0 0 0 0 0 0 0 0 0 0 5.041 0 0 0 5,041 EHRLICH 23-14 Weld 437 4,069 1,654 3,113 231, 9,503 0 0 0 0 0 0 0 0 0 0 0 0 9,503 0 0 0 9,503 EMC 36-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6 0 0 0 0 EMC36-2 Weid 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ENGLISH31-20 Weld 0 0 0 1,310 0 1,310 0 0 1,310 0 0 0 0 0 0 0 0 0 0 0 0 0 1,310 ERICKSON 5-43 Weld 5,845 10,918 1,381 3.752 637 22,533 0 0 0 0 0 0 0 0 0 0 0 0 0 22,533 0 0 22,533 FARAMIR FARMS 6-2 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 FARAMIR FARMS6-IRC Weld 0 0 0 0 98 98 0 0 0 0 0 0 98 0 0 0 0 0 0 0 0 0 98 FARAMIR FARMS 6-3 Weld 1,056 6,700 2,005 7,041 150 16,953 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 16,953 16.953 FARAMIR FARMS 6-32"- Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0, FARAMIR FARMS 6-34Weld 0 0 3,640 961 150 4,751 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 4,]51 4,751 FARAMIR FARMS 6-4 Weld 0 0 0 0 0 0 0 D 0 0 0 0 i 0 0 0 0 0 0 0 0 0 0 FERGUSON 35-1 Weld 0 6,800 0 970 0 7770 0 0 0 7.770_ 0 0_ 0 0 0_ 0 0 0 0 0 0 0 7,770 FRANK 13-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 FRANK 13-21 Weld 0 0 7,762 7,480 336 15,577 0 0 0 0 0 0 0 0 0 0 0 D 0 0 0 15.5]] 15,577 FRANK 25-13 Weld 453 4,378 2,928 4,617 1.235 13.610 0 0 0 0 0 0 0 0 0 0 0 0 13,610 0 0 0 13,610 FRANK 32-23 Weld 3,014_ 5.000 2,658 3,397 906 14,974 0 0 0 0 0 0 0 0 0 0 0 0 0 14,974 0 0 14,974 FRANK 32-24 Weld 3.014 0 648 3.035 1471 8,168 0 0 0 0 0 0 0 0 0 0_ 0 0 0 8,168 0 0 8,168 FRY 13-1 _Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 D 0 f FRY 132 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 FRY 18-1 Weld 0 0 0 0 0 0 0 0 0 0 ..C_ 0 0 _ 0 _ _ n 0 0 GILCREST IOWNSI I E 21-34 Weld 4,483 10.049 1,094 5,117 182 20.924 0 0 0 0_ 0 0 0 0 0 0 0 0 0 0 0 20.924 20.924 Gil CRFST TOWNSITE 20-12 Weld 0 0 0 0 0 0 0 0 0 0 0 0 C 0 0 0 0 0 0 0 0 0 0 Page 3 of 9 PRIMA OIL 8 CAS COMPANY HISTORICAL DETAIL COST HISTORICAL DETAIL COST BY CATEGORY HISTORICAL DETAIL COST BY YEAR H.T./ SEPARATORS/ VALVES MISC. PRODUCTION AND SURFACE TOTAL Well Name County TANKS UNITS FLOWLINES FITTINGS EQUIP. COSTS 1975 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 TOTAL GILL LAND 22-1RC Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 GILL LAND 22-3 Weld 0 0 0, 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 GOODHARD 22-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 GOZA 18-1 'Weld 0 0 0 0 Or 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 GREEN 17-33 Weld 5.840 0 1,089 2,464 517 9,910 0 0 0 0 0 0 0 0 0 0 0 0 0 0 9,910 0 9.910 GREENHEAD 18-11 Weld 3,438 5.562 330 2,635 0 11,965 0 0 0 0_ 0 0 0 0 0 0 0 0 11,965 0 0 0 11,965 GREENHEAD 18-12 Weld 3,438 5,562 330 3,184 0' 12,513 0 0 0 0 0 0 0 0 0 0 0 0 12,513 0 0 0 12,513 GUNTHER1&1 Weld 0 0 0 0 0 0 0 0 0 0_ 0 0 0 0 0 0 0 0 0 0 0 0 0 GUNTHER 18-2 Weld 0 0 0 0 0 0 0 0 0 0_ 0 0 0 0 0 0 0 0 0 0 0 0 0 GURLEY 31-23 Weld 437 3,090 978 3,521 1.15] 9,183 0 0 0 0_ 0 0 0 0 0 0 0 9,183 0 0 0 0 9,183 GURLEY 31-24 Weld 437 3.090 1,021 4.128 0 8,676 0 0 0 0 0 0 0 0 0 0 0 8.676 0 0 0 0 8,676 GUTTERSEN 5-1 Weld 0 0 0 0 0 0 0 0 0 0_ 0 0 0 0 0 0 0 0 0 0 0 0 0 HANKINS#1 Weld 0 0 D 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - HANKINS#2 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 HARLESS 1]-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 D HARLESS 17-2 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 HENRYS-1 Weld 0 0 0 0 0 0 0 0 0/ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 HENRY5-2 Weld 0 0 o1 0 0 0 0 D U D U u u u u u Of 0 0 Of a Of 0 HENRY 5-3 Weld 0 0 0 0 0 0 0 0 0 0 f 0 0 0 0 0 0 0 0 0 0 0 0 0 HENRY 5-4 Weld 0 0 0 0 0 0 0 0 0 0_ 0 0 0 0 0 0 0 0 0 0 0 0 0 HOLMAN 14-1 Weld 0 0 0 0 0 0 0 0 0 0_ 0 0 0 0 0 0 0 0 0 0 0 0, 0 HOWARD 4-42 l Weld 0 0 388 2,098 129 2.614 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2,614 2.614 HOWELL32-1 l Weld 0 0 0 0 0 0 0 0 0 0_ 0 0 0 0 0 0 0 0 0 0 0 D 0 HOWELL32-2 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 f HOWELL32-23 Weld 0 0 0 1,173 293 1,466 0 0 0 0 0 0 0 0 0 0 1,466 0 0 0 0 0 1,466 HUWA11-1RC Weld 0 0 0 0 0 0 0 0 0 0 0 0 O 0 0 0 0 0 0 0 0 0 0 HUWA 11-2 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 JOHNSON 1-22 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 JOHNSON22-11 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 JOHNSON29-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 JURGENS 8-1 Weld 0 0 0 0 0 0_ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 JURGENSO-2 Weld _ 0 0 0 0 0 0 0 0 0 0 0 0 0 D 0 0 0 0 0 0 0 0 0 KALLAS 4-42 Weld 0 5,123 3.326 4,241 505 13,195 0 0 0 0 0 0 0 0 0 0 0 0 0 13.195 0 0 13,195 KAMMERZELL 7-41 Weld 1,723 4,589 2,221 2,79] 226 11.556 0 0 0 0 0 0_ 0 0 0 0 0 0 11,556 0 0 0 11.556 KAMMERZELL 7-42 Weld 1.723 4.590 1,046 2,810 226 10.396 0 0 0 0 0 0 0 0 0 0 0 0 10,396 0 0 0 10,396 KAMMERZELL 7-43 Weld 2.905 3.708 313 4.804 34 11,764 0 u 0 0 0 0 0 0 0 0 0 0 11.764 0 0 0 11764 KAMMERZELL 0-44 Weld 2,905 3,708 313 2,252 188 9,367 0 0 0 0 0 0 0 0 0 0 0 0 0 9.367 0 0 9,367 KNAUB 4-1 Weld 0 0 0 0 _ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Page 4 of 9 PRIMA OIL S GAS COMPANY HISTORICAL DETAIL COST 'HISTORICAL DETAIL COST BY CATEGORY HISTORICAL DETAIL COST BY YEAR H.T./ SEPARATORS/ VALVES MISC. PRODUCTION AND SURFACE TOTAL Well Name County TANKS UNITS FLOWLINES FITTINGS EQUIP. COSTS 1975 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 TOTAL KNAUB 4-32 Weld 1803 4800 1,247 3,150 1,115 12,115 0 0 0 0 0 0 0 0 0 0 0 0 12,115 0 0 0 12,115 KNAUB 5-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 KNAUB5-12 Weld 0 0 1,940 374 1,640 3,954 0 0 0 0 0 0 0 0 0 0 0 3.954 0 0 0 0 3,954 LAND 31-01 Weld 0 0 0 419 0 419 0 0 0 0 0 419 0 0 0 0 0 0 0 0 0 0 419 LAND31-01A Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 LAND31-02 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 LAND 31-11 Weld 0 0 2,388 1.981 1,548_ 5,918 0 0 0 0 0 0 0 0 0 0 0 5.918 0 0 0 0 5.918 LAND 31 13 Weld 0 0 2,738 1,950 1491 6,180 0 0 0 0 0 0 0 0 0 0 0 6,180 0 0 0 0 6.180 LATHAM#1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 LATHAM 2-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 f LATHAM 2-42 Weld 1,887 0 2.836 4,410 1,130 10,262 0 0 0 0 0 0 0 0 0 0 0 10,262 0 0 0 0 10,262 LATHAM 2-43 Weld 2,793 0 2.836 4,565 0 10.193 0 0 0 0 0 0 0 0 0 0 0 10.193 0 0 0 0 10.193 LATHAM 2-44 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 LATHAM 3-1 Weld 0 0 0 0 0 0 _ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 LATHAM3-2 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 LATHAM3-24 Weld 0 0 487 4,256 411 5,153 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5,153 5.153 LATHAM 3-34 Weld 0 0 645 1,951 494 3,090 0 0 0 0 0 0 0 0 0 0 0 3.090 0 0 0 0 3.090 LEAMING27-24 Weld 0 0 299 0 0 299 0 U U u u u u u u u 299 0 0 0 0 0 299 LINDBLAD 22-20 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 LOFLAND 22-42 Weld 1.273 3,500 1,504 4,512 391 11,179 0 0 0 0 0, 0 0 0 0 0 0 0 0 0 0 11.179 11,179 LOFLAND 22-43 Weld 1,273 3,500 1,504_ 3.336 401 10,013 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 10.013 10,013 LORENZ FARMS 22-13 Weld 453 7,000 3.464 6,487 164 17,568 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 17,568 17.568 LOUSTALET 15-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 LOUSTALET30-IRC Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 LOUSTALET30-2RC Weld 0 0 0 1,187 0 1,187 0 0 0 0 0 0 0 1.187 0 0 0 0 0 0 0 0 1,187 LOUSTALET30-3 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 LOUSTALET30-4 Weld 0 0 0 134 0 134 0 0 0 0 0 0 0 0 0 134_ 0 0 0 0 0 0 134 LUNDVALL 13-12 Weld 4,411 3,498 2,123 4,004 1,097 15,133 0 0 0 0 0 0 0 0 0 0 0 0 15.133 0 0 0 15,133 — LUNDVALL 13-13 Weld 4,411 3,498 2,123 2,918 1097 14.046 0 0 0 0 0 0 0 0 0 0 0 0 14,046 0 0 0 14,046 LUNDVALL 13-14 Weld 5.947 11,203 1,371 5.34/ 1,134 25,002 0 0 0 0 0 0 0 0 0 0 0 0 0 25,002 0 0 25,002 MARK35-01 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MARK 35-02 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MARK35-11 Weld 0 0 2,517 2.891 1,115 6.523 0 0 0 0 0 0 0 0 0 0 0 6,523 0 0 0 0 6,523 MARK 35-13 Weld 0 0 2.551 3.716 3.648 9,915 0 0 0 0 0 0 0 0 0 0 0 9,915 0 0 0 0 9.915 MCCARTHY#1 Weld 0 3.500 0 0 183 3,683_ 0 3.683 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3,683 MCCARTHY 633 Weld 906 3,500 3.694 4,618 589 13.308 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 13,308 13.308 MCCLELLAN 3-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MCCLELLAN3-32 Weld 2,575 6,995 0 2.346 364 12.279 0 0 0 0 0 0 0 0 0 0 0 0 12,279 0 0 0 12.279 Page 5 of 9 PRIMA OIL&GAS COMPANY HISTORICAL DETAIL COST HISTORICAL DETAIL COST BY CATEGORY HISTORICAL DETAIL COST BY YEAR H.T./ SEPARATORS/ VALVES MISC. PRODUCTION AND SURFACE TOTAL Well Name County TANKS UNITS FLOWLINES FITTINGS EQUIP. COSTS 1975 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 TOTAL MCCLELLAN4-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MCCLELLAN 4-12 Weld 0 0 2.180 5,183 329 7,693 0 0 0 0 0 0 0 0 0 0 0 0 7,693 0 0 0 7,693 MCKENNEY6-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MCKENNEY 6-12 Weld 3.011 0 3,338 3,458 429 10.235 0 0 0 0 0 0 0 0 0 0 0 10,235 0 0 0 0 10.235 MCKENNEY6-14 Weld 3,011 0 3.338 3,521 1,971 11,841 0 0 0 0 0 0 0 0 0 0 0 11,841 0 0 0 0 11,841 f MCKENNEY6-2 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MCKENNEY6-3 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MCKENNEY6-42 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MCKENNEY6-43 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MCLEOD 29-01 Weld 0 0 0 0 0 0 _ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MCLEOD29-02 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MCLEOD 29-13 Weld 4,146 5,593 2,730 4.112 227 16,807 0 0 0 0 0 0 0 0 0 0 0 0 0 16,807 0 0 16,807 MCLEOD 29-14 Weld 3,245' 5,593 1,082 4,185 227 14.331 0 0 0 0 0 0 0 0 0 0 0 0 0 14.331 0 0 14,331 MCLEOD 29-41 Weld 2,343 5,593 1,230 3,552 227 12,945 0 0 0 0 0 0 0 0 0 0 0 0 0 12,945 0 0 12,945 MCMURREN 22-31 Weld 2.091 7,000 539 3,367 404 13,401 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 13,401 13,401 MCWILLIAMS 81 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MCWILLIAMS#2 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MCWILLIAMS 15-32 Weld 824 0 2,062 6,790 906 10.582 0 0 0 0 0 0 0 0 0 0 0 0 10.582 0 0 0 10.582 MCWILLIAMS 15-34 Weld 2.472 5.000 1,597 1,672 1,692 12,433 0 0 0 0 0 0 0 0 0 0 0 12,433 0 0 0 12,433 MD 20-1 Weld 0, 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MD 20-2 Weld 1.775 0 0 0 0 1.775 0 0 0 0 0 0 0 0 0 1,775 0 0 0 0 0 0 1.775 MILLER24-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MILLER24-1S Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MOSER#1 RC Weld 0 0 0- 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MOSER 10-31 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MOSER FARMS 4-1Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MOSER FARMS 4-2 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MUIRHEAD 1-1 Weld 0 0 0 0 0 0- 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MUIRHEAD 1-2 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 _ MUIRHEAD 1-3 Weld 0, 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MUIRHEAD 1-34 Weld 1,208 10,049 970 1,946 73 14,246 0 0 0 0 0 . 0 0 0 0 0 0 0 0 0 14,246 0 14.246 MUIRHEAD 1-4 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MULVERY22-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MYERS 14-21 Weld 0 0 456 0- 0 456 0 0 0 0 0 0 0 0, 0 0 0 456_ 0 0 0 0 456 NICE.ROBERT 22-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - NIES 15-14 Weld 3.991 5,995 1,190 5,287 1,097 18,561 0 0 0 0 0 0 0 0 0 0 0 0 18,561 0 0 0 18,561 OGGC CARPIO 22-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0_ 0 0 0 0 0 OGGC GRUEN 22-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 o o 0 o Page 6 of 9 PRIMA OIL E.GAS COMPANY HISTORICAL DETAIL COST HISTORICAL DETAIL COST BY CATEGORY HISTORICAL DETAIL COST BY YEAR HT./ SEPARATORS/ VALVES MISC. PRODUCTION AND SURFACE TOTAL Well Name County TANKS UNITS FLOWLINES FITTINGS EQUIP. COSTS 1975 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 TOTAL OGGC GRUEN 22-2 Weld 0 0 0 0 0 0 0 0 0 0 0, 0 0 0 0 0 0 0 0 0 0 0 0 OGGC OTTINGER 22-1 Weld 0 0 0 100 846 946 0 0 0 946 0 0 0 0 0 0 0 0 0 0 0 0 946 _ ORR 24-1 Weld 0 0 0 3,000 0 3,000 0 0 0 0 0 0 0 0 0 0 3,000 0 0 0 0 0 3.000 OSTER 15-11 Weld 5,588 5.761 590 242 0 12.181 0 0 0 0 0 0 0 0 0 0 0 0 0 12,181 0 0 12,181 OSTER15-14 Weld 901 5,761 2,443 -372 0 8,733 0 0 0 0 0' 0 0 0 0 0 0 0 0 8,733 0 0 8.733 PHILLIPS23-11 Weld 0 0 1,117 5416 1,095 7.628 0 0 0 0 0 0 0 0 0 0 0 0 7,628 0 0 0 7,628 PHILLIPS 23-12 Weld 0 0 1,822 3,389 227 5,437 0 0 0 0 0 0 0 0 0 0 0 0 5,437 0 0 0 5.437 PHILLIPS 23-13 Weld 0 0 1.834 1,948 1,082 4,864 0 0 0 0 0 0 0 0 0 0 0 0 4.864 0 0 0 4,864 PHILLIPS 23-14 Weld 3,739 11,186 1,087 4,783 227 21,021 0 0 0 0 0 0 0 0 0 0 0 0 21,021 0 0 0 21.021 - PHILLIPS 24-21 Weld 3.076 3.729 1.640 2,318 1,134 11,897 0 0 0 0 0 0 0 0 0 0 0 0 0 11,897 0 0 11,897 PHILLIPS 24-22 Weld 3.076 3.869 1,640 2,639 1.134 12,358 0 0 0 0 0 0 0 0 0 0 0 0 0 12,358 0 0 12,358 PHILLIPS 24-23 Weld 0 3,729 4,700 4,861 951 14,241 0 0 0 0 0 0 0 0 0 0 0 0 14.241 0 0 0 14,241 PLATTE VALLEY 13-24 Weld 3.550 6.800 1,811 3,926 1,413 17,499 0 0 0 0 0 0 0 0 0 0 0 0 17,499 0 0 0 17,499 PLUSS25-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 PLUSS 32-43 Weld 3.399 7,931 271 3,355 0 14,955 0 0 0 0 0 0 0 0 0 0 0 14,955 0 0 0 0 14,955 QUICK21-13 Weld 0 0 393 0 0 393 0 0 0 0 0 0 0 0 0 0 0 393 0 0 0 0 393 RADKE MD 22-1Weld 0 0 0 1,141 0 1.141 0 0 0 0 0 0 0 0 1,141 0 0 0 0 0 0 0 1,141 _ RIVER#1 Weld 453 7.000 3.85.,^ 177 11480 0 0 04. 0 0 0 0 0 0 0 0 0 0 0 0 11,480 11,480 RODRIOUEZ I]-32 Weld 5.840 0 1,089 2.497 517 9,943 0 0 0 0 0 0 0 0 0 0 0 0 0 9,943 0 0 9,943 ROTHE II-1 Weld 2.349 5.123 2.072 2,891 5,108 17,544 0 0 0 0 0 0 0 0 0 0 0 0 0 17,544 0 0 17,544 ROTHE 1-14 Weld 2,349 5.123 2,072_ 3,040 4,796 17,380 0 0 0 0 0 6 0 0 0 0 0 0 0 17,380 0 0 17,380 ROUKEMA5-1 Weld 0 195 0 1,700 0 1.895 0 0 0 1.895 0 0 0 0 0 0 0 0 0 0 0 0 1,895 RYDGREN 8-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 SALLEE 14-1RC Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 SALLEE 14-2 Weld 0 0 0 0 0 0 0 0, 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 SALLEE 14-25 Weld 0 0 0 0 0 0 _ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 SALLEE 14-3RC Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0' 0 SALLEE 14-43 Weld 854 11.381 1,496 2.931 41/ 17,079 0 0 0 0 0 0 0 0 0 0 0 0 17,079 0 0 0 17,079 SCHAAL 20-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Y SCHISSLER 1-1 weld 0 6.800 0 827 0 7,627 _ 0 0 7,627 0 0 0 0 0 0 0 0 0 0 0 0 0 7,627 SCHISSLER 1-11 Weld 0 0 1,925 3,537 232 5,693 0 0 0 0 0 0 0 0 0 0 0 0 0 5,693 0 0 5,693 SCHISSLER 4-14 Weld 4.638 10,962 899 2,682 226 19,407 0 0 0 0 0 0 0 0 0 0 0 0 19,407 0 0 0_ 19,407 _ — _ SELBY1 Weld 0 0 0 0 0 0 0 0 0 0 0 0, 0 0 0 0 0 0 0 0 0 0 0 SEYMOUR MENDELL 22-1 Weld 0 0 0 0 0 0 o, 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 SHEEPDRAW#1(#13-22) _Weld 0 0 0_ 0_ 0 0 0 0 0 0 0 0 0 0 0 0 0_ 0 0 0 0 0 0 SHEEPDRAW NO#1(#19-23) Weld 0 0 0 0 0 0 0 0 0 0 0 .. 0 0 0 0 0 0 0 0 SHEEPDRAW SO#1(#2344! Weld 0 0 0 0 0 _ 0 0, 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 SITZMAN 3-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 u 0 0 0 0 0 Page 7 of9 PRIMA OIL A.GAS COMPANY HISTORICAL DETAIL COST HISTORICAL DETAIL COST BY CATEGORY HISTORICAL DETAIL COST BY YEAR H.T./ SEPARATORS/ VALVES MISC. PRODUCTION AND SURFACE TOTAL Well Name County TANKS UNITS FLOWLINES FITTINGS EQUIP. COSTS 1975 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 TOTAL ST#1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 STATE 18-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ' STATE BOOTH 36-2 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ' STATE CLARK 36-21 Weld 2,252 5,034 1.390_ 2.758 99 11,533 0 0 0 0 0 0 0 0 0 0 0 0 0 0 11,533 0 11,533 STATE CLARK 36-22 Weld 2,252 5,034 1,390 2.978 137 11,791_ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 11,791 11,791 STATE EHRLICH 36-23 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 STATE EHRLICH 36-23Y Weld 2,289 5,034 1,636 3,375_ 406 12,740_ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 12,740 0 12,740 STATE EHRLICH 36-32 Weld 2.289 5,034 1,636_ 2.958 619 12,536_ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 12,536 0 12,536 STATE FARM 36-06 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 STATE FARM 36-07 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 STATE FARM 36-11 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 STATE HOPPE 16-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 STATE HOPPE 16-2 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 STATE HOPPE 16-3 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 STATE SCHMIDT 36-03 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 STATE SCHMIDT 36-04 Weld 0 0 0, 0 0 0 0 0 0 0 0 0 0 0 0 0 0, 0 0 0 0 0 0 f STATE SCHMIDT 36-05 Weld 0 0 2,804 0 0 2.804 0 0 0 0 2,804 0 0 0 0 0 0 0 0 0 0 0 2,804 STATE SCHMIDT 36-08 Weld 0 0 2,393 0 2393 0 0 0 0, 0 0 2.390p3 0 0 0 0 0 0 0 0 0 2.393 STATE SCHMIDT36-09 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 STATE SCHMIDT 36-10 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 STATE SCHMIDT 36-12 Weld 0 0 0 608 99 708 0 0 0 0 0 0 708 0 0 0 0 0 0 0 0 0 708 STEPHENS 7-11 Weld 2,650 5.123 1,480 3,184 757 13,194 0 0 0 0 0 0 0 0 0 0 0 0 0 13.194 0 0 13,194 STEPHENS 7-12 Weld 901 5,123 1,480 3,283 757 11,544 0 0 0 0 0 0 0 0 0 0 0 0 0 11.544 0 0 11,544 STEPHENS 7-14 Weld 1,748 0 2.458 1,500_ 2,154 7.860 0 0 0 0 0 0 0 0 0 0 0 0 0 0 7,860 0 7,860 STEWART30-1RC Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 .- STEWART30-2 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 STOCKOVER 16-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 STOUT 9-4 Weld 5,000 0 487 165 -264 5,388 0 0 0 0_ 0 0 0 0 0 0 0 0 5,388 0 0 0 5,388 STROH 24-21 Weld 3,768 3.966 2.067 3.233 828 13,862 0 0 0 0_ 0 0 0 0 0 0 0 13,862 0 0 0 0 13,862 STROH 24-22 Weld 0 3,966 2,034 3,048 0 9,047 0 0 0 0 0 0 0 0 0 0 0 9,047 0 0 0 0 9,047 SULLIVAN 3-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 SWAEFORD 11-11 Weld 2,675, 5,459 878 1.955 661, 11628 0 0 0 0 0 0 0 0 0 0 0 0 0 11,628 0 0 11,628 SWANSON 28-21 Weld 750 3,000 3017 4,762 433 11,961 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 11,961 11.961 SWANSON 28-24 Weld 3,290 3,251 4,936 3,493 31 15,000 0 0 0 0 0 0 0 0 0 0 0 0 15,000 0 0 0 15.000 SWANSON29-11 Weld 750 _ 3.000 3.017 4.762 418 11947 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 11.947 11,947 SWANSON 29-14 Weld 2.416 4,658 2,209 3,425 31 12,738 0 0 0 0 0 0 0 0 0 0 0 0 12,738 0 0 0 12.738 TIGGES 31-18 Weld 0 0 0 0 0 C 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TIGGES31-19 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Page 8 of 9 PRIMA OIL&GAS COMPANY HISTORICAL DETAIL COST HISTORICAL DETAIL COST BY CATEGORY HISTORICAL DETAIL COST BY YEAR H.T./ SEPARATORS/ VALVES MISC. PRODUCTION AND SURFACE TOTAL Well Name County TANKS UNITS FLOWLINES FITTINGS EQUIP. COSTS 1975 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 TOTAL TODD9-1 Weld 0 0I 0 0 0 0 0 0 TODD 9-12 Weld 0 8,755 3.327 5,675 1,710 19.467 0 0 0 0 0 0 0 0 0 0 0 19,467 0 0 0 0 19,467 TOLLGATE 29-12 Weld 3,245 5,593 1,007 3,686 825 14,355 0 0 0 0 0 0 0 0 0 0 0 0 0 14,355 0 0 14,355 TNO E RANCH 7-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 ULRICH21-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 URLICH 21-2 Weld 0 0 0 0 0 0 0 0 VANNOY 1141 Weld 5,794 6,000 0 0 0 0 0 0 0 0 0 0 0 0 0 18,041 0 0 18,041 VOGLER 1-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 WADDLE 30-44 Weld 3,192 7,931 17,429 0 0 0 0 17.429 WAGNER 10-1RC Weld 0 0 0 650 1,093 1,743 0 0 0 0 0 1,743 WALKER 4-24 Weld 4,563 10,962 1,410 3.068 226 20,228 0 20,228 0 0 0 20,228 WARDELL 20-41 Weld 1,882 11,717 0 0 0 0 0 0 0 0 0 0 0 0 21,233 0 0 0 21,233 WARDELL 20-44 Weld 0 6,995 0 12,315 0 0 0 12,315 WARDLAW 35-21 Weld 0 10.327 0 0 17,515 0 0 17,515 WARDLAW 35-22 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2,950 0 0 2,950 WARDLAW 35-23 Weld 6.048 6.000 0 0 0 0 0 0 0 0 0 0 0 0 21,034 0 0 0 21,034 WEIDENKELLER1-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 WEIDENKELLER 1-2 Weld 0 0 0 U 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 WEIDENKELLER 1-22 Weld 3.464 0 339 3,607 0 7,410 0 0 0 0 0 0 0 0 0 0 0 7,410 0 0 0 0 7,410 WESTERN SUGAR 4-43 Weld 4,041 7,018 333 3,661 -1.078 13,975 0 0 0 0 0 0 0 0 0 0 0 13,975 0 0 0 0 13.975 WIEDEMAN 29-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 WIEDEMAN29-2 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 WIEDEMAN29-3 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 WIEDEMAN G 21-11 Weld 3,807 7,433 878 -710 0 11,407 0 0 0 0 0 0 0 0 0 0 0 0 11,407 0 0 0 11407 WILMOTH6-2 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 WILMOTH6-3 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 WILSON ill Weld 0 0 0 0 2 2 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 2 WINDER2-19 Weld 0 0 0 0 3 3 0 0 0 0 0 0 0 0 0 3 0 0 0 0 0 0 3 TOTAL WELD COUNTY 323,702 627301 239,278 500.224 89,460 1,779,964 1,403 3.683 27,593 10,610 2,808 419 5.777 1,187 1,141 1,913 6,471 261,511 529,361 595,219 102,959 227,910 1,779.964 Page 9 of 9 PRIMA OIL&OAS COMPANY RETURN OF INVESTMENT 1996 DEPRECIATION-Roll (14 YR.STRAIGHT LINE METHOD/MIDYEAR CONVENTION Well Name County 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 TOTAL ALLISON24-1RC Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6 0 0 ALLISON24-2RC Weld 0_ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ALLISON 24-3 Weld 0 0 0 0 0 0 0, 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 AMEN#1 Weld 0 0 0 0 0 0 0 0 0 656 1,313 1,313 1,313 1,313 1,313 1,313 1313 1,313_ 1,313 1,313 1,313 1,313 1,313 17,722 AMIGO 17-12Weld 0 0 0 0 0 a 0 0 0 0 0 0 0 0 0 0 0 0 0 0 800 1,599 1,599 3.998 AMIGO 17-24 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 847 1,694 1.694 4,236 ANDERSON 4-44 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 81 81 ' API 24-1RC Weld 0 a 0 0 o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 API 24-22 RC Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 268 537 537 537 537 2,414 ' API 24-24Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 731 731 API24-34 Weld 0 0- 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 521 521 API 24-42 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 427 427 APPOLLO#1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 ARISTOCRAT 11-1 Weld 0 0 0 0 0- 0 0 0 0 0 0 0_ 0 0 0 0 0 0 0 0 0 0 0 0 ARISTOCRAT11-2 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ARISTROCRAT 11-21 Weld 0 0- 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 336 671 671, 671 671 3,021 ARISTROCRAT 11-24 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 261 521 521 521 521 2,346 ' ARTIST 11-12 Weld 0 0 0 0 0 0 0 0 0 0 0 0 D 0 0 D D 0 0 0 479 957 957 2.393 BAIER25-11 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 393 786 786 786 2,752 BARNARD4-22 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 866 1,732 1.732 4,331 BARNARD4-23 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 88 176 176 439 .- BAUER9-1 Weld 0 0 0 0 0- 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 BEEBE DRAW 11-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 BEEBEDRAW11-2RC Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 .- BEELER#1 Weld 0 50 100 100 100 100 100 100 100 100 100 100 100 100 100 50 0 0 0 0 0 a 0 1,403 BEITMAN 4-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 BERNHARDT 1-11 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 364 729 729 729 2.551 _ BERNHARDT 1-12 Weld 0 0 0 0 a 0 0 0 0 0 0 0 0 0 0 0 0 0 0 420 839 839 839 2,937 BERNHARDT 13-12 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 830 1.659 1,659 4,148 BERNHARDT 13-14 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 726 1,453 1,453 1.453 5,085 BERNHARDT 7-31 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 454 909 909 909 3,181 BETZ#1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 BETZ9-14 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 167 335 335 335 1,171 BETZ9-44 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 19 38 38 38 38 38 211 _ BIOKLING3.41 Weld 0 0 0 0 0 0, 0 0 0 0 0, 0 0 0 0 0 0 0 0 0 679 1,357 1,357 3,393 BICKLING 342 Weld 0 0 0 0 0 0 0 0 0 a 0 0 0 0 0 0 0 0 0 0 282 563 563 1,408 BICKLING3-44 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 a 0 0 a 232 465 465 1,162 BOHLENDER13-'RC Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Page 1 of 9 PRIMA OIL&GAS COMPANY RETURN OF INVESTMENT 1996 DEPRECIATION-Roll (14 YR.STRAIGHT LINE METHOD/MIDYEAR CONVENTION Well Name County 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 198T 1988 1989 1990 1991 1992 1993 1994 1995 1996 TOTAL BOHLENDER 29-13 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 325 649 649 649 649 2.922 BOHLENDER33-02 Weld 0- 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 BOHLENDER 33-03RC Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 BOHLENDER 33-05 Weld _ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 BOHLENDER 33-06 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 BOHLENDER33-07 Wed 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0' 0 0 0 0 0 0 0 BOHLENDER 33-22RC Weld 0 0 0 0 6 0 0 0 0 0 0 0 0 0 0 0 0 3 5 5 5 5 5 29 BOOTH25-11 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 364 727 727 727 2,545 BOOTH 25-12 Weld 0 0 0 0 0 0 0 0- 0 0 0 0 0 0 0 0 0 0 0' 0 491 981 981 2,453 � BOOTH 25-14 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 417 834 834 2.084 BOULTER 31-2 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 o 0 0 0 0 0 0 0 0 0 0 BOULTER 10-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 BOULTER10-4t Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 31 62 62 62 62 62 341 ' BOULTER 10-43 Weld 0 0 0 0 0r 0 0 0 0 0 0 0 0 0 0 0 0 8 16 16 16 16 16 89 BOULTER 11-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 BOULTER31-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 BRIGGS I-11 ,Weld • 0- 0, 00 0 0 0 0 0 0_ 0 0 0 0 0 0 0 0 0 0 494 988 988 988 3,459 BRIGGS I-12 Weld 0 0 0 0 0 U 0 0 0 O O _ 368 736 736 n6 ?,577 BRIGGS 1-14 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0, 510 1.020 1,020 1,020 3.571 BROWN3-14 Weld 0- 0 0 0 0 0 0 0 0_ 0 0 0 0 0 0 0 0 0 0 0 940 1,881 1.881 4,702 BRUNNER 14-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 BURKE24-1RC Weld 0 0 0 0 0 0 0 0- 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 BURKE 24-2RC Weld 0 0 0 0 0 0 0 0 o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 BURKE 24-3 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 30 60 60 60 60 60 60 60 60 60 565 BURKE 24-3S _Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 CARLSON 10-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 CARPIO22-41 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 CECIL23-13 _Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 778 1.557 1,557 3,892 CHAMPLIN 23-3 Weld 0 0 0, 0 0 0 0 F 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 CHRISTIANSEN 1-35 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 511 1,022 1,022 1,022 1,022 4,599 COBB6-23 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 304 607 607 607 607 2,733 COCKROFT 11-23 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 741 1,483 1,483 3,707 COLLINS 1-1 Weld 0 0 0 0 0 o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 CORNELIUS11-22 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0_ 0 0 0 0 0 434 869 1.303 CORNELIUS 11-23 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 01 0 0 433 867 86/ 2.167 COX B-1 Weld 0 0 0 0 0 0 0 0 0 _ 0 0 0 U 0 0 0 0 6 0 DECHANT 7-11 Weld 0 0 0 0 0 0 O F 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 DECHANT?-14 Weld 0 0 0 0 0 0 0 0 0 .0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Page 2 of 9 PRIMA OIL&GAS COMPANY RETURN OF INVESTMENT 1996 DEPRECIATION-Rofl (14 YR.STRAIGHT LINE METHOD/MIDYEAR CONVENTION Well Name County 1974 1915 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 TOTAL f DIETRICH 7-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 DINGE53-33 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 845 1,690 1,690 4,225 DINNER 1-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 DINNER 1-14 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0_ 0 0 0 0 0 0 0 0 596 1,191 1,787 DINNER 1-2 Weld 0 0 0 0 0 0 0 D 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 DINNER 1-3 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 DINNERI4-1RC Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 DINNER 1-42 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 189 378 567 DINNER1-44 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 241 483 483 483 1,690 ..- DINNER 15-1RC Weld 0 0 0 0 0 0 0 0 0 10 20 20 20 20 20 20 20 20 20 20 20 20 20 268 DINNER6-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 DINNER6-2 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 DINNER6-3 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 DOLL23-1 _Weld 0 0 0 0 0 0 0� 0 0 0 0 0 0 0 0 0 5 0 0 0 0 0 0 0 _ DUNGAN1M Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 EHRLICH 23-11 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 180 360 360 360 1,260 EHRLICH 23-14 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 339 679 679 679 2.376 EMC36-1 Weld 0 0 0 0_ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 EMC 36-2 Weld 0 0 6 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ENGLISH 31-20 Weld 0 0 0 0 0 0 0 0 0 47 94 94 94 94 94 94 94 94 94 94 94 94 94 1,263 ERICKSON 5-43 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0, 0 0 0 0 805 1,609 1.609 4,024 FARAMIR FARMS 6-2 Weld 0 0 6 0 0 0 0 0 0 0 0 0 0 0 0 0 0 o 0 0 0 0 0 0 FARAMIR FARMS6-1RC Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 3 7 7 7 7 7 7 7 7 7 66 FARAMIR FARMS 6-3 Weld 0 0 0 0_ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 605 605 FARAMIR FARMS 6-32r" Weld 0 0 6 0 0 0 0 0 a a 0 0 0 0 0 0 0 0 0 0 0 0 0 0 FARAMIR FARMS 6-34Weld 0 0 0 0- 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 170 170 � FARAMIR FARMS 6-4 Weld 0 0 0 0 0 0 0 0, 0� 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 FERGUSON 35-1 Weld 0 0 0 0— 0 0 0 0 0 0 277 555 555 555 555 555 555 555 555 555 555 555 555 6,937 FRANK 13-1 l Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5 0 0 FRANK 13-21 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 556_ 556 FRANK25-13 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 486 972 972 972 3.403 FRANK32-23 Weld 0 0 0 0- 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 535 1,070 1,070 2,674 FRANK 32-24 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0- 0 0 0 0 0 0 0 292 583 583_ 1,459 FRY 13-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 FRY13-2 _Weld 0 0 0 0_- 0 0 0 0 0_ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 FRY 18 1 Weld 0, 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 GILCREST TOWNSITE 21 34 Weld - 01 0 0 0 0 0 0 0 0 0 0 0 0 0 0, 0 0 0 0 0 0 0 7471 747 GILCRESTTOWNSITE 7812 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Page 3 of 9 PRIMA OIL&GAS COMPANY RETURN OF INVESTMENT 1996 DEPRECIATION-Roll (14 YR.STRAIGHT LINE METHOD/MIDYEAR CONVENTION Well Name County 1974 1975 1976 1977 1976 1979 1980` 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 TOTAL GILL LAND22-1RC Weld 0 0 0 O. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6 6 0 0 0 GILL LAND 22-3 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 D 0 0 0 0 0 0 0 0 GOODHARD 22-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 GOZA 18-1 Weld 0 0 0 0 0 0 D 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 GREEN 17-33 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6 354 708 1,062 GREENHEAD 18-11 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 427 855 855 855 2,991 GREENHEAD 18-12 Weld 0 0 0 0 0 0 0, 0, 0 0 0 0 0 0 0 0 0 0 0 447 894 894 894 3,128 GUNTHER 18-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6 0 0 GUNTHER 18-2 Weld _ 0 0 0 0� 0 0 0 0 0 0 0 D 0 0 0 0 0 0 0 0 0 0 0 GURLEY 31-23 l Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 328 656 656 656 656 2,952 GURLEY 31-24 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 310 620 620 626 620 2,789 GUTTERSEN 5-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0' 0 0 0 0 0 _ _ HANKINS#1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 HANKINS#2 Weld — 0_ 0 0 0 0 0 0_ 0 0 0_ 0 0 0 0_ 0_ 0 0 0 0_ 0 0 6 a 0 HARLESS 17-1 Weld _ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 _ _ HAPLESS 17-2 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 — HENRY 5-1 f Weld ,,- 0 0 0 0 0 0 0 a 0 a a a 0 0 0 0 a 0 0 0 a a 0 0 HENRYS-2 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 HENRY 5-3 Weld 0 0 0 D 0 0 0 0 0 0 0 0 0 0 0 0 0_ a ., _ _ _ 0 0 0_ HENRY5-4 _Weld _ 0 0 0_ 0 0 0 0 0 0 0 0 0_ 0 0 0 0 0 0 0 0 0 0 0 0 HOLMAN 14-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 HOWARD4-42 Weld - 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 a a a a 0 5 93 93 HOWELL32-1 _Weld _ 0 0_ 0 0 0 0 0 0� 0 0 0_ 0 0 0 0 0 0 0 0 0 0 0 5 0 HOWELL32-2 Weld - 0 0_ 0 0 0 0 0 0_ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 HOWELL32-23 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 52 105 105 106 105 105 576 _ f HUWA11-1RC Weld O 0_ a a 0 0 a 0 0 a 0 0 0 0 0 0 0 0 0 0 0 0 0 0 _ _ _ _ _ HUWA 11-2 Weld 0 0 0 0 0 0 0 0_ 0 0 0 0 0 0 0 0 0 0 0 0 0 a 0 a JOHNSONI-22 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 JOHNSON 22-11 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 JOHNSON29-1 _Weld _ 0_ 0_ 0_ 0_ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0_ 0 0 0 0 JURGENSB-1 Weld 0 0 0 0 a 0 0 0 0 a a a 0 a a a a 0 a 0 a 0 0 0 JURGENSB-2 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 KALLAS 4.42 _Weld _ a a a_ a a a a a a a a a a a a a a a a 0 471 942 942 2,356 KAMMERZELL 7-41 Weld 0 0 a 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 413 825 825 825 2,889 KAMMERZELL 7-42 Weld 0 0' 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 371 743 743 743 2,599 KAMMERZELL7-43 Weld 0 J 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 420 840 840 840 2,941 KAMMERZELL7-44 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 u a o 0 0 0 335 569 669 1,673 - KNAUB 4-1 Weld 0 0 0 0 0 0 U 0 0 0 a 0 0 0 0 0 0 0 0 0 0 0 0 0 Page 4 of 9 PRIMA OIL&GAS COMPANY RETURN OF INVESTMENT 1996 DEPRECIATION-Rofl (14 YR.STRAIGHT LINE METHOD/MIDYEAR CONVENTION Well Name County 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 TOTAL KNAUB 4-32 Weld 0_ 0 0_ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0_ 0 433 865 865 865 3,029 KNAU65-1 Weld 0 0 0 0 0 0 0 0 0 0 D 0 0 0 0 0 0 0 0 0 0 0 0 0 KNAU65-12 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 141 282 282 282 282 1,271 LAND 31-01 Weld 0 0 0 0 0 0 0 0 0 0 0 0 15 30 30 30 30 30 30 30 30 30 30 314 — LAND31-01A Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 LAND 31,02 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 LAND 31-11 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 211 423 423 423 423 1,902 LAND31-13 Weld 0' 0 0 0 0 0 0 0 0 0 0 0 D 0 0 0 0 0 221 441_ 441 441 441 1,986 _ LATHAM H1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 LATHAM 2-1 Weld 0' 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 LATHAM 2-42 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 367 733 733 733 733 3.299 LATHAM 2-43 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 364 728 728 728 728 3.276 LATHAM 2-44 _Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0_ 0 0 0 0 0 0 LATHAM 3-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 LATHAM 3-2 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 LATHAM 3-24 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 184 184 LATHAM 3-34 Weld 0 0 0 0 0 0 0 0 0 0, 0 0 0 0 0 0 0 0 110 221 221 221 221 993 LEAMING27-24 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 11 21 21 21 21 21 118 f LINDBLAD 22-20 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 LOFLAND 22-42 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 399 399 LOFLAND 22-43 _Weld 0 0 0 0 0 0 0 0 0_ 0 0 0 0 0 0 0 0 0_ 0 0 0 0 358 358 LORENZ FARMS 22-13 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 627 627 _ LOUSTALET 15-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 LOUSTALET30-1 RC Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 LOUSTALET30-2RC Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 42 85 85 85 85 85 85 85 85 720 LOUSTALET 30-3 l Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 LOUSTALET 30-4 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0_ 0 5 10_ 10 10_ 10 10 10 62 LUNDVALL 13-12 Weld 0 0 0 0 0 0 0, 0 0 0 0_ 0 0 0 0 0 0 0 0 540 1,081 1.081 1,081 3,783 LUNDVALL 13-13 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 502 1,003 1.003 1.003 3,512 LUNDVALL 13-14 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 893 1,786 1,786 4,465 _ MARK35-01 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MARK 35-02 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MARK35-11 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 233 466 466 466 466 2.097 MARK35-13 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 354 708 708 708 708 3.187 MCCARTHY 101 Weld 0 0 0 0 0 0 0 0 132 263 263 263 263 263_ 263 263_ 263 263 263 263 263 263 132 3,683 MCCARTHY 6-33 Weld _ 0 0 D 0 0 0 0 G_ 0 0 0 0 0 0 0 0 0 0 0 0 0 475 475 MCCLELLAN 3-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 D MCCLELLAN 3-32 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 439 V/ 877 877 3,070 � Page 5 of 9 PRIMA OIL&GAS COMPANY RETURN OF INVESTMENT 1996 DEPRECIATION-Rofl (14 YR.STRAIGHT LINE METHOD/MIDYEAR CONVENTION Well Name County 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 TOTAL MCCLELLAN 4-1 Weld 0_ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 r 0 0 0 0 MCCLELLAN4-12 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 275 549 549 549 1,923 MCKENNEY6-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MCKENNEV 6-12 Weld 0_ 0 0 0 0 0 0 0 0 0 r 0 0 0 0 0 0 0 0- 366 731 731 731 731 3,290 MCKENNEV 6-14 Weld 0_ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 423 846 846 846 846 3,806 MCKENNEY6-2 Weld 0 0- 0 0 0 0 0 0 0 0 0 0 0 0 0 0 D 0 0 0 0 0 0 0 MCKENNEY 6-3 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MCKENNEY6-42 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MCKENNEV 6-43 Weld 0 0- 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 D MCLEOD29-01 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MCLEOD 29-02 Weld 0 r 0 0 0 0 0 0 0 0 0 0, 0 0 0 0 0 0 0 0 0 0 0 0 0 MCLEOD 29-13 Weld 0 r 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0_ 0 0 0 0 600 1.201 1,201 3.001 MCLEOD29-14 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 512 1,024 1,024 2.559 MCLEOD 29-41 Weld 0 0 0, 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 462 925 925 2,312 MCMURREN22-31 Weld 0 0 0 0 0 0 0 0 0 0 0' 0 0 0 0 0 0 0 0 0 0 0 479 479 _ MCWILLIAMS#1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MCWILLIAMS#2 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MCWILLIAMS15-32 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 378 756 756 756 Z646 MCWILLIAM515-34 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 D 0 0 0 0• 444 888 888 888 888 3.996 MD 20-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MD 20-2 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 r 0 63 127 127 127 127 127 127 824 MILLER24-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MILLER 24-1S Weld _ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 _ MOSER111RC Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MOSER I0-31 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 r 0 0 0 0 0 0 MOSER FARMS 4-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MOSER FARMS 4-2 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MUIRHEAD 1-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MUIRHEAD1-2 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0, 0 0 0 0 0 0 0 0 0 0 .-- MUIRHEAD1-3 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - MUIRHEAD 1-34 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 509 1,018 1,526 MUIRHEADI-0 Weld 0 0 0 0 0 0 0 0 0 0 0 r 0 0 0 0 0 0 0 0 0 0 0 0 0 MULVERY 22-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 MYERS 14-21 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 16 33 33 33 33 147 NICE,ROBERT 22-1Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 NIES 15-14 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0, 0 0 0 0 663 1,326 1,326 1,326 4,640 OGGC CARPIO 22-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 G 0 o 0 0 0 0 0 OGGC GRUEN 22,1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 G 0 0 0 0 0 0 Page 6 of 9 PRIMA OIL A GAS COMPANY RETURN OF INVESTMENT 1996 DEPRECIATION-Rofl (14 YR.STRAIGHT LINE METHOD/MIDYEAR CONVENTION Well Name County 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 TOTAL OGGC GRUEN 22-2 Weld 0 0 0 0 0 0 0 0 0 0 0 0_ 0 0 0 0 0 0 0 0 0 0 0 0 ' OGGC OTTINGER 22-1 Weld 0 0 0 0_ 0 0 0 0 0 0 34 68 68 68 68 68 68 68 68 68 68 68 68 845 ORR 24-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 107 214 214 214 214 214 1,179 _ OSTER 15-11 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 435 870 870 2.175 OSTER15-14 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 312 624 624 1,560 PHILLIPS23-11 Weld 0 0 0 0'_ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 272 545 545 545 1,907 PHILLIPS 23-12 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 194 388 388 388 1,359 PHILLIPS 23-13 Weld 0 0 0 0 0 0, 0 0 0 0 0 0 0 0 0 0 0 0 0 174 347 347 347 1.216 PHILLIPS23-14 Weld - 0 0_ 0 0'_ 0 0 0 0 0 0 0 0 0 0 0 0 0_ 0 0 751 1.501 1,501 1,501 5,255 PHILLIPS24-21 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 425 850 850 2,124 PHILIJPS24-22 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 441 883 883 2,207 PHILLIPS 24-23 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 509 1,017 1,017 1,017 3,560 PLATTE VALLEY 13-24 Weld 0 0 0 0 0 0 0 0 0 0 0 0_ 0 0 0 0 0 0 0 625 1,250 1,250 1,250 4,375 PLUSS25-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 PLUSS 32-43 _Weld 0 0_ 0 0 0 0 0 0 0 0 0 0_ 0 0 0 0 0 0 534 1,068 1,068 1,068 1,068 4,807 QUICK21-13 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 14 28 28 28 28 126 RADKE MD 22-1 Weld - 0 0 0 0 0 0 0 0 0 0 0 0_ 0 0 0 41 81 81 81 81 81 81 81 611 RIVER#1 Weld 0 0 0 0 0 0 0 0 n_ 0 0 0 0 0 0 0 0 0 0 410 410 RODRIQUEZ 17-32 l Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6 0 355 710 710 1,776 ROTHEI1-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 627 1,253 1,253 3,133 - ROTHE1-14 Weld 0 0 0 0, 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 621 1,241 1,241 3.104 _ROUKEMA5-1 Weld 0 0 0 0 0 0 0 0 0 0 68 135 135 135 135 135 135 135 135 135 135 135 135 1,692 , RYDGREN 8-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 BALI FE 14-1RC Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 SALLEE 14-2 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0• 0 0 0 0 0 o 0 0 0 SALLEE 14-25 Weld _ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 _ SALLEE 14-3RC Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 SALLEE 14-43 l Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 610 1,220 1,220- 1,220 4,270 SCHAAL 20-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 SCHISSLER 1-1 Weld 0' 0 0 0 0 0 0 0 0 272 545 545_ 545 545_ 545 545 545 545 545 545 545 545 545 7,354 SCHISSLER 1-11 _Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 203 407 407 1,017 SCHISSLER 4-14 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 693 1.386 1,386 1,386 4,852 SELBYI Weld 0 0 0 0 0 0 0' 0 0 0_ 0 0_ 0_ 0 0 0 0 0_ 0 0 0 0 0 0 - SEYMOUR MENDELL 22-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 SHEEPDRAW#1(#13-221 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 SHEEPDRAW N0 91(#19-23) weld J 0 0 0 0 0 0 0 0 0 J 0 0 0 O O 0 0 0 9 0 9 0 0 SHEEPDRAW SO#1,423-441 Weld 0 a 0 0 0 0 0 0 0 0 0 0 0 0, 0 0 0 0, 0 0 0 0 0 0 SITZMAN 3-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Page/of 9 PRIMA OIL&GAS COMPANY RETURN OF INVESTMENT 1996 DEPRECIATION-Rofl (14 YR.STRAIGHT LINE METHOD/MIDYEAR CONVENTION Well Name County 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 TOTAL ST#1 Weld 0_ 0 0 0 O D a 0 0 0 0 0 0 o 0 0 0 0 0 D a 0 0 0 STATE18-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 a 0 0 0 0 0 a 6 0 0 STATE BOOTH 36-2 Weld 0 0 0 0 0 0 a 0 0 0 0 0 a a 0 0 0 0 a 0 o 0 0 a STATE CLARK 36-21 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 a 412 824 1,236 STATE CLARK 36-22 Weld 0 0 0 0 a 0 0 0 0 0 0 0 a 0 0 0 0 0 a 0 0 0 421 421 STATE EHRLICH 36-23 _Weld a 0 0 0 o 0 0 0 a 0 o a 0 0 o 0 0 0 a 0 0 0 0 0 STATE EHRLICH36-23Y Weld 0 0 a 0 0 0 0 0 0 0 0 0 0 0 0 0 a 0 0 0 a 455 910 1,365 STATE EHRLICH 36-32 Weld 0 0 0 0 0 0 a 0 0 0 a 0 0 0 0 0 0 0 0 a 0 448 895 1,343 STATE FARM 36-06 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 a 0 0 0 0 0 0 0 0 0 STATE FARM 36-07 Weld 0 0 0 0 a 0 0 0 0 0 0 0 a 0 0 a a 0 0 0 a 0 a 0 STATE FARM 36-11 Weld 0 0 0 0 0 0 a a a 0 0 a 0 a 0 0 a 0 a a a a D 0 STATE HOPPE 16-1 Weld 0 0 0 D a 0 0 0 0 0 0 0 0 0 a 0 0 0 0 0 0 0 0 0 STATE HOPPE16-2 Weld 0 a 0 a a" 0 a 0 0 a a, 0 O a 0 0 0 0 0 0 0 0 0 0 STATE HOPPE 16-3 _Weld 0_ 0 0 0 0 0 a 0 0 0 a 0 0 a a 0 0" 0 0 0 a a a 0 STATE SCHMIDT 36-03 Weld 0 a 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 a 0 0 0 0 0 STATE SCHMIDT36-04 Weld 0 0 0 0 0 0 0 0 a 0 a a 0 0 0 0 0 0 0 0 0 0 0 0 STATE SCHMIDT 36-05 Weld 0 0 0 0 0 0 0 a a 0 0 100 200 200 200 200 200 200 200 200 200 200 200 2.304 l 171 171 171 171 171 171 171 1.624 _STATE SCHMIDT 36-08 Weld 0 0 a a o D a a a a ., 85 .. 17 _ STATE SCHMIDT 36-09 Weld 0 0 0 0 0 0 0 0 0_ 0 0 0 0 0 '0 0 0 0 0 0 0 0 0 0 STATE SCHMIDT 36-10 Weld 0 0 0 a 0 0 0 0 D a 0_ 0 0 a a a_ 0 0 a a a a 0 0 STATE SCHMIDT36-12 Weld 0 0 0 0 0 a a a 0 a a 0 0 25 51 51_ 51 51 51 51 51 51 51 480 STEPHENS]-11 Weld 0 a 0 0 a 0 0 a a 0 0 a a 0 a 0 o 0 0 0 471 942 942 2,356 STEPHENS]-12 Weld 0 0 0 0 0 0 a 0 0 0 0 0 0 a 0 a a 0 a 0 412 825 825 2,061 STEPHENS]-14 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 a 0 0 0 0 0 0 0 281 561 842 STEWART 30-1RC Weld 0 0 0 a 0 0 a 0 0 0 0 0 0 0 a 0 o 0 0 0 0 0 0 a STEWART30-2 Weld 0 0 0 0 0 0 o " a 0 0 a o o a 0 a 0 0 0 a 0 0 0 0 STOCKOVER 16-1 Weld 0 0 0 a 0 0 0 0 0 0 0 0 0 0 0 0_ 0 0 a, 6 a a 0 0 STOUT 9.4 Weld 0 0 0 0 0 0 0 0 0 a 0 0 0 o 0 0_ 0 0 0 192 385 385 385 1,347 STROH 24-21 Weld 0 0 a 0 0 0 0 0 D 0 0 0 0 0 0 0_ 0 0 495 99a 990 990 990 4,456 STROH 24-22 Weld 0 0 0 a 0 0 a 0 0 a 0 0 0 0 0 0 0 a 323 646 646 646 646 2,908 SULLIVAN3-1 Weld 0 a 0 0 0 0 0 0 0 0 0 0 0 0 a 0 0 0 0 6 0 0 0 0 SWAFFORD 11-11 Weld 0 0 a a 0 a a 0 0 0 a a 0 a 0 0 a 0 0 0 415 831 831 2,076 SWANSON28-21 Weld 0 0 0 0 a 0 0 0 0 a 0 0 0 0 0 0 0 0 a a 0 0 427 427 SWANSON28-24 Weld 0 0 0 0 0 D 0 0 a 0 a 0 a o a 0 0 0 0 536 1,071 1,071 1.071 3,750 SWANSON29-11 Weld 6 a a 0 0 o a 0 0 a a a a 0 0 a_ 0 0 0 0 0 0 427 427 SWANSON29-14 Weld 0 0 0 a 0 0 a 0 0 0 0 0 0 0 0 0 a 0 0 455 910 910 910 3,185 TIGGES31-18 Weld 0 a 0 0 0 0 0 0 0 0 0 0 0 a 0 0 0 0 0 0 0 0 0 0 TIGGES31-19 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Page 8 of 9 PRIMA OIL&GAS COMPANY RETURN OF INVESTMENT 1996 DEPRECIATION-Rofl (14 YR.STRAIGHT LINE METHOD/MIDYEAR CONVENTION 1 Well Name County 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 TOTAL TODD9-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TODD9-12 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 695 1,390 1,390 1,390 1,390 6,257 TOLLGATE 29-12 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 513 1,025 1.025 2.563 TWO RANCH 7-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 a 0 0 0 0 0 0 0 0 0 0 ULRICH21-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 URLICH 21-2 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 VANNOY 11-41 Weld 0 0 0 0 0� 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 644 1,289 1,289 3,222 VOGLER 1-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0, 0 0 0 0 0 0 WADDLE 30-44 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0_ 0 0 0 0 0 622 1,245 1,245 1,245 1,245 5.602 WAGNER 10-1RC Weld 0- 0 0 0 0 0 0 0 0 0 0 0 0 62 124 124 124 124 124 124 124 124 124 1,183 WALKER4-24 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 722 1,445 1,445 1,445 5,057 � WARDELL20-41 Weld 0- 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 758 1.517 1,517 1,517 5.308 WARDELL20-44 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 440 880 880 880 3,079 WARDIAW 35-21 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 626 1.251 1,251 3,128 WARDLAW 35-22 Weld 0 0 0 0 0 0 0 0 0 0 0 0'f 0 0 0 0 0 0 0 0 105 211 211 527 WAROLAW 35-23 Weld 0 0 0 0 0 0 0 0 0 0 0 0_ 0 0 0 0 0 0 0 751 1,502 1.502 1,502 5,259 WEIDENKELLER1-1 Weld 0 0 0 0 0_ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 WEIDENKELLER1.2 Weld 0 0 0 0 0 0 0 0 0 0 0 0_ 0 0 0 a a 0 a 0 0 n_ WEIDENKELLER 1-22 Weld 0 0 0 0 0 0 0 0 0 0 a 0 0 0 0 0 0 0 265 529 529 529 529 2,382 WESTERN SUGAR 4.43 Weld 0 0 0 0 0 0 0 0 o 0 0 0 0 0 0 0 0 0 499 998 998 998 998 4,492 WIEDEMAN29-1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 WIEDEMAN29-2 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0, 0 0 0 WIEDEMAN29-3 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 WIEDEMAN G 21-11 We 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 407 815 815 815_ 2.852 WILMOTH6-2 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ' WILMOTH6-3 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 WILSON#1 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 WINDER2-19 Weld 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 TOTAL WELD COUNTY 0 50 100 100 100 100 100 100 232 1,349 2,713 3.192 3,308 3,529 3,778 3,811 3,870 4,169 13,740 41,985 82.149 107,084 118,769 394,327 Page 9 of 9 PRIMA OIL&GAS COMPANY RETURN ON INVESTMENT RETURN ON INVESTMENT(ROI) 1996 AVERAGE 12/31/1995 NET 12/31/1996 NET NET BOOK ACTUAL ROI TOTAL ROI Well Name County BOOK VALUE BOOK VALUE VALUE RATE DEDUCTION ALLISON 24-1RC Weld 0 0 0 7.813% 0 ALLISON 24-2RC Weld 0 0 0 7.813% 0 ALLISON 24-3 Weld 0 0 0 7.813% 0 AMEN#1 Weld 1,969 656 1,313 7.813% 103 AMIG017-12 Weld 19,989 18.390 19,189 7,813% 1,499 AMIGO 17-24 Weld 21,178 19,484 20,331 7.813% 1,588 ANDERSON 4-44 Weld 0 2,184 1.092 7.813% 85 API 24-1 RC Weld 0 0 0 7813% 0 API 24-22 RC Weld 5,633 5,097 5.365 7.813% 419 API 24-24 Weld 0 19.743 9,871 7.813% 771 API 24-34 Weld 0 14,074 7,037 7.813% 550 API 2432 Weld 0 11,530 5,765 7.813% 450 APPOLLO#1 Weld 1 1 1 7813% 0 ARISTOCRAT 11-1 Weld 0 0 0 7.813% 0 ARISTOCRAT 11-2 Weld 0 0 0 7.813% 0 ARISTROCRAT 11-21 Weld 7,050 6,378 6.714 7.813% 525 ARISTROCRAT 11-24 Weld 5.475 4,953 5,214 7.813% 407 ARTIST 11-12 Wed 11,963 11,006 11485 7.813% 897 BAIER 25-11 Weld 9,042 8,255 8.649 7.813% 676 BARNARD 4-22 Weld 21.656 19,924 20,790 7.813% 1.624 BARNARD 4-23 Weld 2,197 2,021 2,109 7.813% 165 BAUER9-1 Weld 0 0 0 7.813% 0 BEEBE DRAW 11-1 Weld 1 1 1 7.813% 0 BEEBE DRAW 11-2R0 Weld 0 0 0 7.813% 0 BEELER#1 Weld 0 0 0, 7.813% 0 BEITMAN 4-1 Weld 0 0 0 7.813% 0 BERNHARDT 1-11 Weld 8,383 7,654 8,018 7813% 626 BERNHARDT 1-12 Weld 9,651 8,812 9.232 7.813% 721 BERNHARDT 13-12 Weld 20,742 19.082 19,912 7.813% 1,556 _ BERNHARDT 13-14 Weld 16.707 15,255 15,981 7.813% 1,249 BERNHARDT 7-31 Weld 10,453 9,544 9,999 7.813% 781 BETZ#1 Weld 0 0 0 7.813% 0 BETZ 9-14 Weld 3.849 3,514 3,681 7.813% 288 BETZ 9-44 Weld 364 326 345 7.813% 27 BICKLING 331 Weld 16,966 15,609 16,287 7.813% 1,273 BICKLING 342 Wela 7,040 6.477 6,759 7.813% 528 BICKLING 3-44 Weld 5810 5.345 5.578 7.813% 436 BOHLENDER 13-!RC Weld 0 0 0 7.813% 0 Page 1 of 9 PRIMA OIL&GAS COMPANY RETURN ON INVESTMENT RETURN ON INVESTMENT(ROI) 1996 AVERAGE 12/31/1995 NET 12/31/1996 NET NET BOOK ACTUAL ROI TOTAL ROI Well Name County BOOK VALUE BOOK VALUE VALUE RATE DEDUCTION BOHLENDER 29-13 Weld 6,818 6.169 6.494 7.813% 507 BOHLENDER 33-02 Weld 0 0 0 7.813% 0 BOHLENDER 33-03RC Weld 0 0 0 7.813% 0 BOHLENDER 33-05 Weld 0 0 0 7.813% 0 BOHLENDER 33-06 Weld 0 0 0 7.813% 0 —BOHLENDER 33-07Weld 0 0 0 7.813% 0 BOHLENDER 33-22RC Weld 51 45 48 7813% 4 BOOTH 25-11 Weld 8,363 7.636 8,000 7.813% 625 BOOTH 25-12 Weld 12,266 11284 11,775 ].813% 920 BOOTH 25-14 Weld 10,422 9.588 10,005 7813% 782 BOULTER 31-2 Weld 0 0 0 7.813% 0 _ BOULTER 10-1 Weld 0 0 0 7813% 0 BOULTER 10-41 Weld 589 527 558 7.813% 44 BOULTER 10-43 Weld 153 137 145 7813% 11 BOULTER II-1 Weld 0 0 0 7813% 0 BOULTER31-1 Weld 0 0— 0 7.813% 0 BRIGGS I-11 Weld 11,365 10,377 10,871 7813% 849 BRIGGS 1-',2 Weld 8.468 ]732_ 8.100 7.813% 633 _ BRIGGS 1-14 Weld 11,734 10.713 11,223 7.813% 877 BROWN 3-14 Weld 23,510 21,629' 22,569 ].813% 1,763 BRUNNER 14-1 Weld 0 0 0 7.813% 0 BURKE 24-1RC Weld 0 0 0 7.813% 0 BURKE 24-2RC Weld 0 0 0 7813% 0 BURKE 24-3 Weld 327, 268 298 7.813% 23 BURKE 24-3S Weld 0 0 0 7.813% 0 CARLSON 10-1 Weld 0 0 0 7.813% 0 CARPIO 22-41 Weld D 0' 0 7.813% 0 CECIL 23-13 Weld 19,459 17.903 18,681 7.813% 1,460 CHAMPUN 23-3 Weld 0 0 0 7.813% 0 CHRISTIANSEN 1-35 Weld 10,731 9,709_ 10,220 7813% 798 COBB 6-23 _Weld 6.377_ 5,770 6.074 7.813% 475 COCKROFT 11-23 Weld 18.537 17,054 17,796 7.813% 1,390 COLLINS 1-1 Weld 0 0 0 7.813% 0 CORNELIUS 11-22 Weld 11,731 10,862 11,296 7.813% 883 CORNELIUS 11-23 Weld 10,837 9,970 10,403 7.813% 813 COX 8-1 Weld 0 0 7.81316 0 DECHANT 7-11 Weld 0 0 0 7.813% 0 DECHANT 7-14 Weld 0 0 0 7.813% 0 Page 2 of 9 PRIMA OIL 8 GAS COMPANY RETURN ON INVESTMENT RETURN ON INVESTMENT(ROI) 1996 AVERAGE 12/31/1995 NET 12/31/1996 NET NET BOOK ACTUAL ROI TOTAL ROI Well Name County BOOK VALUE BOOK VALUE VALUE RATE DEDUCTION DIETRICH 7-1 Weld 0 0 0 7.813% 0 DINGES 3-33 Weld 21,126 19.436 20.281 7.813% 1.585 DINNER 1-1 Weld 0 0 0 7.813% 0 DINNER 1-14 Weld _ 16,081 14,890 15,486 7.813% 1,210 DINNER 1-2 Weld 0 0 0 7.813% 0 DINNER 1-3 Weld 0 0 0 7.813% 0 DINNER 14-1RC Weld 0 0 0 7.813% 0 DINNER 1-42 Weld 5,104 4,726 4.915 7.813% 384 DINNER 1-44 Weld 5,553 5,071 5,312 7.813% 415 DINNER 15-1RC Weld 30 10 20 7.813% 2 DINNER6-1 Weld 0 0 0 7.813% 0 DINNER 6-2 Weld 0 0 0 7.813% 0 DINNER 6-3 Weld 0 0 0 7.813% 0 DOLL 23-1 Weld 0 0 0 7.813% 0 DUNGAN k1 Weld 0 0 0 7.813% 0 EHRLICH 23-11 Weld 4,141 3.781 3,961 7.813% 309 EHRLICH 23-14 weld 7,806 7,127 7,467 7.813% 583 EMC36-1 Weld 0 0 0 7.813% 0 EMC 36-2 Weld 0 0 0 7.813% 0 ENGLISH 31-20 Weld 140 47 94 7.813% 7 ERICKSON 5-43 Weld 20.118 18.509 19,314 7.813% 1,509 FARAMIR FARMS 6-2 weld 0 0 0 7.813% 0 FARAMIR FARMS 6-1 RC Weld 38 31 35 7.813% 3 FARAMIR FARMS 6-3 Weld 0 16,347 8,174 7.813% 639 FARAMIR FARMS 6-32 Weld 0 0 0 7.813% 0 ' FARAMIR FARMS 6-34 Weld 0 4,582 2,291 7.813% 179 FARAMIR FARMS 6-4 Weld 0 0 0 7.813% 0 FERGUSON 35-1 Weld 1.387 832 1.110 7.813% B7 FRANK 13-1 Weld 0 0 0 7.813% 0 FRANK 13-21 Weld 0 15,021 7,510 7.813% 587 FRANK 25-13 Weld 11.180 10,208 10.694, 7.813% 836 FRANK 32-23 Weld 13.370 12.300 12,835 7.813% 1,003 _ FRANK 32-24 Weld 7,293 6,709 7,001 7.813% 547 FRY 13-1 Weld 0 0 0 7.813% 0 FRY 13-2 Weld 0 0_ 0 7.813% 0 - FRY 18-1 Weld 0 0 0 7.813% 0 _ GILCREST TOWNSi LE 21-34 Weld 0 20,176 10.088 7.813% 788 GILCREST TOWNSITE 28-12 Weld 0, 0 0 7813% 0 Page 3 of 9 PRIMA OIL&GAS COMPANY RETURN ON INVESTMENT RETURN ON INVESTMENT(ROI) 1996 AVERAGE 12/31/1995 NET 12/31/1996 NET NET BOOK ACTUAL ROI TOTAL ROI Well Name County BOOK VALUE BOOK VALUE VALUE RATE DEDUCTION GILL LAND22-1RC Weld 0 0 0 7813% 0 GILL LAND 22-3 Weld 0 0 0 7.813% 0 GOODHARD22-1 Weld 0 0 0 7.813% 0 GOZA 18-1 Weld 0 0 0 7.813% 0 GREEN 17-33 Weld 9,556 8,848 9,202 7813% 719 GREENHEAD 18-11 Weld 9,828 8,973 9.401 7.813% 734 GREENHEAD 18-12 Weld 10,279 9,385 9,832 7.813% 768 GUNTHER 18-1 Weld 0 0 0 7.813% 0 GUNTHER 18-2 Weld 0 0 0 7.813% 0 GURLEY 31-23 Weld 6,888 6.232 6,560 7.813% 512 GURLEY31-24 Weld 6,507 5,888 6,197 7.813% 484 GUTTERSEN 5-1 Weld 0 0 0 7.813% 0 HANKINS#1 Weld 0 0 0 7.813% 0 HANKINS#2 Weld 0 0 0 7.813% 0 HARLESS 17-1 Weld 0 0 0 7.813% 0 HARLESS 17-2 Weld 0 0 0 7813% 0 HENRY 5-1 Weld 0 0 0 7.813% 0 HENRY 5-2 Weld 0 0 0 7.813% 0 HENRY 5-3 Weld 0 0 0 7.813% 0 HENRY 5-4 Weld 0 0 0 7.813% 0 HOLMAN 14-1 Weld 0 0 0 7813% 0 HOWARD4-42 Weld 0 2,521 1,261 7.813% 98 HOWELL 32-1 Weld 0 0 0 7.813% 0 HOWELL 32-2 Weld 0 0 0 7.813% 0 HOWELL 32-23 Weld 995 890 942 7.813% 74 HUWA 11-IRC Weld 0 0 0 7.813% 0 HUWA 11-2 Weld 0 0 0 7813% 0 JOHNSON 1-22 Weld 0 0 0 7.813% 0 JOHNSON 22-11 Weld 0 0 0 7.813% 0 JOHNSON 29-1 Weld 0 0 0 7.813% 0 JURGENS8-1 Weld 0 0 0 ]813% 0 JURGENS 8-2 Weld 0 0 0 7.813% 0 KALLAS 4-42 Weld 11,781 10,839 11,310 7.813% 884 KAMMERZELL 7-41 Weld 9,493 8,667 9.080 7.813% 709 KAMMERZELL 7-42 Weld 8,539 7797 8,168 7.813% 638 _ KAMMER/ELL 7-43 Weld 9.563 8,823 9.243 7813% 722 KAMMERZELL 744 Weld 8.363 7,694 8,029 7.813% 627 KNAUB 4-1 Weld 0 0 0 7.813% 0 Page 4 of 9 PRIMA OIL&GAS COMPANY RETURN ON INVESTMENT RETURN ON INVESTMENT(ROI) 1996 AVERAGE 12/3111995 NET 12/31(1996 NET NET BOOK ACTUAL ROI TOTAL ROI Well Name County BOOK VALUE BOOK VALUE VALUE RATE DEDUCTION KNAUB 4-32 Weld 9,951 9,086 9,519 7.813% 744 —KNAUB 5-1 Weld 0 0 0 7.613% 0 _ KNAUB 5-12 Weld 2,966 2,683 2.824 7.813% 221 _ LAND 31-01 Weld 135 105 120 7.813% 9 _ LAND 31-01A Weld 0 0 0 7.813% 0 _ LAND 31-02 Weld 0 0 0 7.813% 0 _ LAND 31-11 Weld 4,438 4,015 4,227 7.813% 330 LAND 31-13 Weld 4,635 4,194 4,414 7.813% 345 LATHAM 41 Weld 0 0 0 7.813% 0 e LATHAM 2-1 Weld 0 0 0 7.813% 0 LATHAM 2-42 Weld 7,697 6,964 7,330 7.813% 573 LATHAM 2-03 Weld 7,645 6.917 7,281 7.813% 569 LATHAM 244 Weld 0 0 0 7.813% 0 _ LATHAM 3-1 Weld 0 0 0 7.813% 0 - LATHAM 3-2 Weld 0 0 0 7.813% 0 LATHAM 3-24 Weld 0 4.969 2,484 7.813% 194 - LATHAM 3-34 Weld 2,318 2,097 2,207 7.813% 172 _ LEAMING 27-24 Weld 203 182 192 7.813% 15 LINDBLAD 22-20 Weld 0 0 0 7.813% 0 LOFLAND 22-42 Weld 0 10.779 5.390 7.813% 421 LOFLAND 22-43 Weld 0 9,656 4,828 7.813% 377 LORENZ FARMS 22-13 Weld 0 16,940 8,470 7.813% 662 LOUSTALET 15-1 Weld 0 0 0 7.813% 0 _ LOUSTALET30-1RC Weld 0 0 0 7.813% 0 LOUSTALET 30-2RC Weld 551 466 509 7.813% 40 _ LOUSTALET 30-3 Weld _ 0 0 0 7.813% 0 LOUSTALET 30-4 Weld 82 72 77 7.813% 6 LUNDVALL I3-12 Weld 12,430 11,350 11,890 7.813% 929 LUNDVALL 13-13 Weld 11,538 10,535 11,036 7.813% 862 LUNDVALL 13-14 Weld _ 22,323 20,537 21430 7.813% 1,674 MARK 35-01 Weld 0 0 0 7.813% 0 MARK 35-02 Weld 0 0 0 7.813% 0 MARK 35-11 Weld 4,893 4,427 4.660 ].813% 364 MARK 35-13 Weld 7,436 6,728 7,082 7.813% 553 MCCARTHY#1 Weld 132 0 66 7.813% 5 MCCARTHY 6-33 Weld 0 12.833 6,416 7.013% 50' MCCLELLAN 3-1 Weld 0 0 0 7.813% 0 MCCLELLAN 3-32 Weld 10.087 9.209 9,648 7.813% 754 Page 5 of 9 PRIMA OIL 8 GAS COMPANY RETURN ON INVESTMENT RETURN ON INVESTMENT(ROI) 1996 AVERAGE 12/31/1995 NET 12431/1996 NET NET BOOK ACTUAL ROI TOTAL ROI Well Name County BOOK VALUE BOOK VALUE VALUE RATE DEDUCTION MCCLELLAN 4-1 Weld 0 0 0 7.813% 0 MCCLELLAN 4-12 Weld 6.319 5.770 6,044 7.813% 472 MCKENNEY 6-1 Weld 0 0 0 7.813% 0 MCKENNEY 6-12 Weld 7,677 6,945 7,311 7.813% 571 MCKENNEY 6-14 Weld 8,881 8.035_ 8,458 7813% 661 MCKENNEY 6-2 Weld 0 0 0 7.813% 0 MCKENNEY 6-3 Weld 0 0 0 7.813% 0 MCKENNEY6-42 Weld 0 0 0 7.813% 0 MCKENNEY 6-43 Weld 0 0 0 7.813% 0 MCLEOD 29-01 Weld 0 0 0 7813% 0 MCLEOD29-02 Weld 0 0 0 7.813% 0 MCLEOD 29-13 Weld 15,006 13,806 14,406 7.813% 1,126 MCLEOD 29-14 Weld 12,795 11,772 12,284 7.813% 960 MCLEOD 29-41 Weld 11,558 10,633 11,096 7.813% 867 MCMURREN 22-31 —Weld 0 12,922 6,461 7.813% 505 MCWILLIAMS 141 Weld 0 0 0 7813% 0 MCWILLIAMS#2 Weld 0 0 0 7.813% 0 MCWILLIAMS 15-32 Weld 8,692 7,937 8.315 7.813% 650 MCWILLIAMS 15-34 Weld 9,325 8.437 8,881 7813% 694 MD 20-1 Weld 0 0 0 7.813% 0 MD 20-2 Weld 1,078 951 1,014 7.813% 79 MILLER 24-1 Weld 0 0 0 7.813% 0 MILLER 24-1S Weld 0 0 0 7.813% 0 MOSER#1 RC Weld 0 0 0 7.813% 0 MOSER 10-31 Weld 0 0 0 7.813% 0 MOSER FARMS 4-1 Weld 0 0 0 7.813% 0 MOSER FARMS 4-2 Weld 0 0 0 7.813% 0 MUIRHEAD 1-1 Weld 0 0 0 7.813% 0 _ MUIRHEAD 1-2 Weld 0 0 0 7.813% 0 MUIRHEAD 1-3 Weld 0 0 0 7.813% 0 MUIRHEAD 1-34 Weld 13,737 12,720 13,229 7.813% 1,034 MUIRHEAD 1-4 Weld 0 0 0 7.813% 0 MULVERY 22-1 Weld 0 0 0 7.813% 0 MYERS 14-21 Weld 342 309 326 7.813% 25 NICE,ROBERT 22-1 Weld 0 0 0 7.813% 0 NIES 15-14 Weld iSZ47 13,921_ 14,584 7.813% 1,139 OGGC CARPIO 22-1 Weld 0 0 0 7.813% 0 OGGC GRUEN 221 Weld 0 0 0 7.813% 0 Page 6 of 9 PRIMA OIL&GAS COMPANY RETURN ON INVESTMENT RETURN ON INVESTMENT(ROI) - 1996 AVERAGE 12/31/1995 NET 12/31/1996 NET NET BOOK ACTUAL ROI TOTAL ROI Well Name County BOOK VALUE BOOK VALUE VALUE RATE DEDUCTION OGGC GRUEN 22-2 Weld 0 0 0 7.813% 0 OGGC OTTINGER 22-1 Weld 169 101 135 7.813% 11 ORR 24-1 Weld 2,036 1821 1,929 7813% 151 OSTER 15-11 Weld 10,876 10,006 10,441 7.813% 816 OSTER 15-14 Weld 7,798 7,174 7,486 7.813% 585 PHILLIPS 23-11 Weld 6.266 5,721 5,994 7.813% 468 PHILLIPS 23-12 Weld 4,466 4,078 4,272 7.813% 334 PHILLIPS 23-13 Weld 3.995 3,648 3,821 7.813% 299 PHILLIPS 23-14 Weld 17,267 15,766 16,516 7.813% 1,290 PHILLIPS 24-21 Weld 10,622 9,772 10,197 7.813% 797 PHILLIPS 24-22 Weld 11,034 10.151 10,592 7.813% 828 PHILLIPS 24-23 Weld 11,698 10,681 11,189 7.813% 874 PLATTE VALLEY 13-24 Weld 14,375 13,125 13.750 7.813% 1,074 PLUSS 25-1 Weld 0 0 0 7.813% 0 PLUSS 32-43 Weld 11.216 10,148 10.682 7813% 835 QUICK 21-13 Weld 295 267 281 7.813% 22 RADKE MD 22-1 Weld 611 530 570 7.813% 45 RIVER#1 Weld 0 11,070 5,535 7.813% 432 RODRIQUEZ 17-32 Weld 8,878 8,168 8,523 7.813% 666 ROTHE II-1 Weld 15,664 14,411 15.038 7.813% 1,175 ROTHE 1-14 Weld 15,518 14,277 14,897 7.813% 1,164 ROUKEMA 5-1 Weld 338 203 271 7.813% 21 RYDGREN 8-1 Weld 0 0 0 7.813% 0 SALLEE 14-1RC Weld 0 0 0 7.813% 0 SALLEE 14-2 Weld 0 0 0 7.813% 0 SALLEE 14-2S Weld 0 0 0 7.813% 0 SALLEE 14-3RC Weld 0 0 0 7.813% 0 SALLEE 14-43 Weld 14,029 12.809 13,419 7.813% 1,048 SCHAAL20-1 Weld 0 0 0 7.813% 0 SCHISSLER 1-1 Weld 817 272 545 7.813% 43 SCHISSLER 1-11 Weld 5.083 4.677 4,880 7.813% 381 SCHISSLER 4-14 Weld 15,941 14,555 15,248 7.813% 1,191 SELBY 1 Weld 0 0 f 0 7.813% 0 SEYMOUR MENDELL 22-1 Weld 0 0 0 7.813% 0 SHEEPDRAW#1(#13-22) Weld 0 0 0 7.813% 0 SHEEPDRAW NO#1(#19-23) Weld 0 0 0 7813% 0 SHEEPDRAW SO#1(#23-44) Weld 0 0 0 7.813% 0 SITZMAN 3-1 Weld 0 0 0 7.813% 0 Page 7 o19 PRIMA OIL 8 GAS COMPANY RETURN ON INVESTMENT RETURN ON INVESTMENT(ROI) 1996 AVERAGE 12/31/1995 NET 12/31/1996 NET NET BOOK ACTUAL ROI TOTAL ROI Well Name County BOOK VALUE BOOK VALUE VALUE RATE DEDUCTION ST t/1 Weld 0 0 0 7.813% 0 STATE 18-1 Weld 0 0 0 7.813% 0 STATE BOOTH 36-2 Weld 0 0 0 7.813% 0 STATE CLARK 36-21Weld 11,121 10,297 10,709 7.813% 837 STATE CLARK 36-22Weld 0 11.370 5.685 7.813% 444 STATE EHRLICH 36-23 Weld 0 0 0 7.813% 0 STATE EHRLICH 36-23Y Weld 12,285 11,375 11830 7.813% 924 STATE EHRLICH 36-32 Weld 12,088 11,193 11,641 7.813% 909 STATE FARM 36-06 Weld 0 0 0 7.813% 0 STATE FARM 36-07 Weld 0 0 0 7.813% 0 STATE FARM 36-11 Weld 0 0 0 7.813% 0 STATE HOPPE 16-1 Weld 0 0 0 7.813% 0 STATE HOPPE 16-2 Weld 0 0 0 7.813% 0 STATE HOPPE 16-3 Weld 0 0 0 7.813% 0 STATE SCHMIDT 36-03 Weld 0 0 0 7.813%, 0 STATE SCHMIDT 36-04 Weld 0 0 0 7.813% 0 STATE SCHMIDT 36-05 Weld 701 501 601, 7.813% 47 STATE SCHMIDT 36-0B Weld 940 769 855 7.813% 67 STATE SCHMIDT 36-09 Weld 0 0 0 7.813% 0 STATE SCHMIDT 36-10 Weld 0 0 0 7813% 0 STATE SCHMIDT 36-12 Weld 278 227 253 7.813% 20 STEPHENS 7-11 Weld 11.780 10.838 11.309 7.813% 884 STEPHENS 7-12 Weld 10,307 9,482 9.895 7.813% 773 STEPHENS 7-14 Weld 7,579 7,018 7,298 7.813% 570 STEWART30-1RC Weld 0 0 0 7.813% 0 STEWART 30-2 Weld 0 0 0 7813% 0 STOCKOVER 16-1 Weld 0 0 0 7.813% 0 STOUT 9-4 Weld 4,426 4,041 4,233 7.813% 331 STROH 24-21 Weld 10,396 9.406 9.901 7.813% 774 STROH 24-22 Weld 6.785 6139 6.462 7.813% 505 SULLIVAN 3-1 Weld 0 0 0 7.813% 0 _ SWAFFORD 11-11 Weld 10,382 9,551 9,967 7813% 779 SWANSON 28-21 Weld 0 11,534 5.767 7.613% 451 SWANSON 28-24 Weld 12.322 11,250 11,786 7.813% 921 - SWANSON 29-11 Weld 0 11.520 5.760 7.813% 450 SWANSON 29-14 Weld 10.463 9554 10,009 7813% 782 TIGGES 31-18 Weld 0 0 0 7.813% 0 TIGGES 31-19 Weld 0 0 0 7.813% 0 Page 8 of PRIMA OIL&GAS COMPANY RETURN ON INVESTMENT RETURN ON INVESTMENT(ROI) 1996 AVERAGE 12/31/1995 NET 12/31/1996 NET NET BOOK ACTUAL ROI TOTAL ROI Well Name County BOOK VALUE BOOK VALUE VALUE RATE DEDUCTION TODD9-1 Weld 0 0 0 7.813% 0 TODD 9-12 Weld 14,600 13,210 13,905 7813% 1.086 TOLLGATE 29-12 Weld 12,817 11,792 12.305 7.813% 961 TWO E RANCH 7-1 Weld 0 0 0 7.813% 0 ULRICH 21-1 Weld 0 0 0 7.813% 0 URLICH 21-2 Weld 0 0 0 7.813% 0 VANNOY 11-41 Weld 16,108 14,820 15,464 7.813% 1.208 VOGLER 1-1 Weld 0 0 0 7.813% 0 WADDLE 30-44 Weld 13,072 11,827 12,450 7.813% 973 WAGNER 10-1RC Weld 685 560 622 7.813% 49 WAI KFR 4-24 Weld 16,616 15,171 15,894 7.813% 1,242 WARDELL 20-41 Weld 17,441 15,925 16.683 7.813% 1,303 WARDELL 20-44 Weld 10,116 9,236 9,676 7.813% 756 WARDLAW 35-21 Weld 15,638 14,387 15,013 7.813% 1,173 WARDLAW 35-22 Weld 2.634 2,423 2,529 7.813% 198 WARDLAW 35-23 Weld 17,278 15,776 16,527 7.813% 1,291 WEIDENKELLER 1-1 Weld 0 0 0 7813% 0 WEIDENKELLER 1-2 weld 0 0 0 7.813% 0 WEIDENKELLER 1-22 Weld 5,558 5.028 5,293 7813% 414 WESTERN SUGAR 4-43 Weld 10.481 9,483 9.982 7.813% 780 WIEDEMAN 29-1 Weld 0 0 0 7813% 0 WIEDEMAN 29-2 Weld 0 0 0 7.813% 0 WIEDEMAN 29-3 Weld 0 0 0 7.813% 0 WIEDEMAN G 21-11 Weld 9,370 8,555 8,963 7.813% 700 WILMOTH 6-2 Weld 0 0 0 7,813% 0 WILMOTH 6-3 Weld 0 0 0 7.813% 0 WILSON#1 Weld 1 1 1 7.813% 0 WINDER 2-19 Weld 2 2 2 7.813% 0 TOTAL WELD COUNTY 1,276,496 1,385,638 1,331,067 103,996 Page 9 of 9 Hello