<PAGE> 1
EXHIBIT (c)(4)
Lease: TOTAL ANTELOPE CREEK DATE : 04/13/00
Field: ANTELOPE CREEK TIME : 10:07:00
County: DUCHESNE State: UT DBS FILE : PEI0400
Operator: PETROGLYPH OPERATING C SETUP FILE : PEI0100
Reserve Category: 1 PVAPD SEQ NUMBER : 565
RESERVES AND ECONOMICS
EFFECTIVE DATE: 1/00
<TABLE>
<CAPTION>
-END- GROSS OIL GROSS GAS NET OIL NET GAS
MO-YR PRODUCTION PRODUCTION PRODUCTION PRODUCTION
---------- ---MBBLS--- ----MMCF--- ---MBBLS--- ----MMCF---
------------ ----------- ----------- ----------- -----------
<S> <C> <C> <C> <C>
12-00 347.086 625.446 281.140 506.611
12-01 312.377 562.902 253.026 455.950
12-02 281.140 506.611 227.723 410.355
12-03 253.026 455.950 201.816 363.671
12-04 227.723 410.355 181.040 326.232
12-05 204.951 369.320 162.936 293.609
12-06 184.456 332.388 146.642 264.248
12-07 166.010 299.149 131.978 237.823
12-08 149.409 269.234 118.780 214.041
12-09 134.468 242.311 106.902 192.637
12-10 121.021 218.080 96.212 173.373
12-11 108.919 196.272 86.591 156.036
12-12 98.027 176.644 77.932 140.432
12-13 88.225 158.980 70.139 126.389
12-14 79.402 143.082 63.125 113.750
------------ ----------- ----------- ----------- -----------
S TOT 2756.241 4966.723 2205.981 3975.159
AFTER 641.087 1155.234 509.664 918.411
------------ ----------- ----------- ----------- -----------
TOTAL 3397.328 6121.957 2715.645 4893.570
============ =========== =========== =========== ===========
</TABLE>
<TABLE>
<CAPTION>
NET OIL NET GAS NET NET TOTAL
PRICE PRICE OIL SALES GAS SALES NET SALES
---$/BBL--- ---$/MCF--- -----M$---- -----M$---- -----M$----
----------- ----------- ----------- ----------- -----------
<S> <C> <C> <C> <C>
19.950 2.040 5608.737 1033.487 6642.224
22.400 1.950 5667.777 889.103 6556.879
22.400 1.950 5100.998 800.193 5901.191
22.400 1.950 4520.680 709.158 5229.838
22.400 1.950 4055.293 636.153 4691.446
22.400 1.950 3649.764 572.538 4222.302
22.400 1.950 3284.787 515.284 3800.071
22.400 1.950 2956.309 463.756 3420.064
22.400 1.950 2660.678 417.380 3078.058
22.400 1.950 2394.610 375.642 2770.252
22.400 1.950 2155.149 338.078 2493.227
22.400 1.950 1939.634 304.270 2243.904
22.400 1.950 1745.671 273.843 2019.514
22.400 1.950 1571.104 246.459 1817.563
22.400 1.950 1413.993 221.813 1635.806
----------- ----------- ----------- ----------- -----------
22.088 1.961 48725.180 7797.156 56522.340
22.400 1.950 11416.480 1790.901 13207.380
----------- ----------- ----------- ----------- -----------
22.146 1.959 60141.660 9588.057 69729.720
============ =========== =========== =========== ===========
</TABLE>
<TABLE>
<CAPTION>
-END- WINDFALL NET ADVAL & DIRECT OPER INTEREST
MO-YR PROFIT TAX PROD. TAXES EXPENSES PAID
---------- -----M$------- ----M$-------- ------M$------ -----M$-------
------------ 0------------- -------------- -------------- --------------
<S> <C> <C> <C> <C>
12-00 .000 359.374 1780.332 .000
12-01 .000 354.757 1683.456 .000
12-02 .000 319.281 1650.360 .000
12-03 .000 282.958 1617.720 .000
12-04 .000 253.828 1572.156 .000
12-05 .000 228.446 1100.136 .000
12-06 .000 205.601 1060.044 .000
12-07 .000 185.041 993.684 .000
12-08 .000 166.537 923.820 .000
12-09 .000 149.883 841.368 .000
12-10 .000 134.895 750.852 .000
12-11 .000 121.405 671.280 .000
12-12 .000 109.265 580.608 .000
12-13 .000 98.338 510.900 .000
12-14 .000 88.504 458.664 .000
------------ -------------- -------------- -------------- --------------
S TOT .000 3058.113 16195.380 .000
AFTER .000 714.579 3272.724 .000
------------ -------------- -------------- -------------- --------------
TOTAL .000 3772.692 19468.100 .000
============ ============== ============== ============== ==============
</TABLE>
<TABLE>
<CAPTION>
CAPITAL EQUITY FUTURE NET CUMULATIVE 9.0% CUM
REPAYMENT INVESTMENT CASHFLOW CASHFLOW DISC CF
------M$------ ------M$------ ------M$------ -------M$----- -------M$-----
-------------- -------------- -------------- -------------- --------------
<S> <C> <C> <C> <C>
.000 .000 4502.518 4502.518 4318.477
.000 .000 4513.666 9021.184 8294.524
.000 .000 3931.550 12952.730 11463.430
.000 .000 3329.160 16281.890 13934.670
.000 .000 2865.462 19147.360 15881.880
.000 .000 2893.720 22041.080 17685.700
.000 .000 2534.426 24575.500 19135.150
.000 .000 2241.339 26816.840 20311.170
.000 .000 1987.701 28804.540 21268.000
.000 .000 1779.001 30583.550 22053.670
.000 .000 1607.480 32191.030 22704.970
.000 .000 1451.219 33642.240 23244.400
.000 .000 1329.641 34971.880 23697.820
.000 .000 1208.324 36180.210 24075.850
.000 .000 1088.638 37268.840 24388.310
-------------- -------------- -------------- -------------- --------------
.000 .000 37268.840 37268.840 24388.310
.000 .000 9220.080 46488.930 26049.770
-------------- -------------- -------------- -------------- --------------
.000 .000 46488.920 46488.930 26049.770
============== ============== ============== ============== ==============
</TABLE>
<TABLE>
<CAPTION>
OIL GAS P.W. % P.W., M$
------------- --------------- ------- --------------
<S> <C> <C> <C> <C> <C>
GROSS WELLS 1.0 .0 LIFE, YRS 36.58 10.00 24855.000
GROSS ULT., MB & MMF 6560.085 16212.850 DISCOUNT % 9.00 12.50 22328.220
GROSS CUM., MB & MMF 3162.757 10090.900 UNDISCOUNTED PAYOUT, YRS .00 15.00 20305.850
GROSS RES., MB & MMF 3397.328 6121.958 DISCOUNTED PAYOUT, YRS. .00 20.00 17276.070
NET RES., MB & MMF 2715.646 4893.571 UNDISCOUNTED NET/INVEST .00 25.00 15115.800
NET REVENUE, M$ 60141.640 9588.056 DISCOUNTED NET/INVEST. .00 30.00 13496.410
INITIAL PRICE, $ 19.950 2.040 RATE-OF-RETURN, PCT. 100.00 50.00 9703.875
INITIAL N.I., PCT. 81.000 81.000 INITIAL W.I., PCT. 100.000 60.00 .000
80.00 .000
100.00 .000
</TABLE>
