HEARD, CLAUDE E., ET AL

Operated by HILCORP ENERGY COMPANY (P-5 386310) in the TOM OCONNOR field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 1539District 02Field 90534001OilCasinghead gasSaveExport
Value, all time
$5.4 M
Jan 1993 – May 2026
Value, last 12 filed months
$0
at the published price for each month
Months reported
401
no gaps in the span
Streams
2
oil, casinghead gas

The Railroad Commission's own record for the field this lease produces from, including the spacing rule that governs how close together its wells may be drilled.

These are facts about the field, not about this lease. The field holds 98 leases and 672 wells, and the rule below applies to all of them.

Discovered
1934-12-31
as the register files it
Field class
Oil and gas
the register's own label
Between wells
300 ft
minimum
From a lease line
150 ft
minimum

A drilling unit in this field needs at least 10 acres. The field rule took effect on 2005-05-10.

The Commission's schedule remark for this field reads: AND FIELD CLASSIFIED AS SALVAGE.

What this lease produced, and what it was worth

Oil and condensate are valued on the volume the state records as disposed of; gas and casinghead gas on the volume produced. They are different columns of different files, and the difference is not cosmetic.

StreamBasisVolumeValue
OilDisposition162,721 bbl$4,410,936
Casinghead gasProduction368,724 Mcf$968,336
Total$5,379,272

164,804 Mcf of this lease's gas, across 48 months, carries no value here. No free Texas wellhead gas price exists before 1997, so those months are left out of the total rather than valued at zero. The total above is therefore a floor, not an estimate.

Wells on this lease (28)

Every wellbore the Railroad Commission records against this lease key, with the depth, the last completion and the plug date exactly as filed. A well with no plug date is not stated to be producing — the state files no such flag.

These wells centre on 28.4037, -97.1378. A lease has no coordinate of its own — that point is the mean of its wells, and they span 2.3 miles. 1 well has no surveyed location and is left out of it.

28.39414, -97.14638 · centre of 27 wells drawn, derived

What these wells add up to

Every figure below is counted over all of this lease's wells, not over the rows listed above. The Railroad Commission files two facts about a well's state — a plug date and a proration-schedule flag — and a well can carry both, so they are published as separate counts and never merged into a status.

On the schedule
92.9%
26 of 28 wells
With a plug date
28.6%
8 of 28 wells
Median depth
5,925 ft
27 wells filed one
Completion to plug
14.8 years
median over 7 wells

What the state filed about each well

On the RRC proration schedule
2692.9%
A plug date is filed
828.6%
BothOn the schedule and plugged. Neither fact cancels the other.
828.6%
NeitherNo plug date, and not on the schedule.
27.1%

A plug date is the date the Commission recorded the wellbore as sealed with cement and abandoned. It is the only end-of-life fact Texas files. There is no "active" flag on a well, so this page does not print one — a well with no plug date is not stated to be producing.

How deep they were drilled

Total depth in feet, 27 of 28 wells. Median 5,925 ft, with the middle half between 5,925 and 6,105 ft; the shallowest is 4,419 ft and the deepest 7,014 ft. The median is published rather than the mean, because a single mis-keyed depth moves a mean and cannot move a median.

When they were last completed

Last completion by decade, 26 of 28 wells, Jan 1971 – Sep 2024. This is the LAST completion filed on each wellbore, not the first — a well recompleted in 2019 counts once, in the 2010s.

Completions filed
Jan 1971 – Sep 2024
26 of 28 wells; 2 filed none
Plug dates filed
Jul 1977 – Apr 2026
8 of 28 wells; 20 filed none

Last completion to plug: a median of 14.8 years across the 7 wells that filed both dates, with the middle half between 9.4 years and 16.5 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

28 wells

42-3910066527,014 ftApr 2026Yes
42-3918059536Yes
42-39100655255,940 ftSep 2024Yes
42-39100546115,925 ftMay 2024Yes
42-391005563GL5,980 ftJun 2021Yes
42-39100660326,273 ftJan 2021Yes
42-39100547125,925 ftMay 2019Yes
42-39100548165,925 ftJan 2016Yes
42-39100656265,918 ftJul 2011Yes
42-39100552145,925 ftMay 2010Yes
42-39100654245,923 ftJun 2009Yes
42-3910066875,925 ftJun 2009Yes
42-39100662346,290 ftApr 2008
42-3910066985,925 ftMar 2008Yes
42-3910055113 L5,925 ftNov 2007May 2025Yes
42-39100658316,390 ftJan 2005Yes
42-39100659336,300 ftDec 2003Yes
42-3910066755,926 ftMay 2000Aug 2012Yes
42-39100553155,925 ftApr 2000Feb 2015Yes
42-39100657305,980 ftMar 1999Feb 2000Yes
42-3910054495,925 ftAug 1993Yes
42-39100653235,925 ftMay 1991
42-391006641 L5,991 ftMay 1988Yes
42-39100641274,419 ftDec 1978Yes
42-39100550185,925 ftDec 1977Yes
42-39100661356,300 ftMar 1976Aug 1993Yes
42-3910084146,071 ftMay 1972Dec 1987Yes
42-39100670376,138 ftJan 1971Jul 1977Yes

The API number is the state's, prefixed 42 for Texas. A well is matched to this lease by the lease key the Commission files on the wellbore record, so a well that has moved between leases appears under each one it was filed against.

Every month this lease reported (401)

Volume × price = value, one row per cycle. The price columns are the same series published on the prices page — nothing here is modelled.

401 months

May 202600106.413.05$0
Apr 20260098.932.87$0
Mar 20260089.753.15$0
Feb 20260063.503.75$0
Jan 20260059.138.00$0
Dec 20250056.664.41$0
Nov 20250058.593.93$0
Oct 20250059.383.30$0
Sep 20250062.743.08$0
Aug 20250063.933.01$0
Jul 20250066.743.32$0
Jun 20250066.483.13$0
May 20250060.553.23$0
Apr 20250062.363.54$0
Mar 20250067.704.27$0
Feb 20250070.884.34$0
Jan 20250074.324.28$0
Dec 20240068.993.12$0
Nov 20240069.052.20$0
Oct 20240071.372.28$0
Sep 20240069.612.36$0
Aug 20240075.632.06$0
Jul 20240079.932.15$0
Jun 20240078.082.63$0
May 20240078.812.20$0
Apr 20240084.451.66$0
Mar 20240080.301.55$0
Feb 20240076.091.78$0
Jan 20240073.023.30$0
Dec 20230071.262.61$0
Nov 20230077.892.81$0
Oct 20230085.443.09$0
Sep 20230089.042.74$0
Aug 20230080.522.67$0
Jul 20230074.852.64$0
Jun 20230068.962.26$0
May 20230070.622.23$0
Apr 20230078.122.24$0
Mar 20230072.852.39$0
Feb 20230075.112.47$0
Jan 20232076.533.39$153
Dec 20225076.415.73$382
Nov 202244085.005.65$3,740
Oct 202261087.185.86$5,318
Sep 202269084.888.16$5,857
Aug 202240094.529.13$3,781
Jul 2022800101.587.54$8,126
Jun 2022600115.097.98$6,905
May 2022590109.378.43$6,453
Apr 2022580104.226.84$6,045
Mar 2022530108.885.08$5,771
Feb 202243091.054.86$3,915
Jan 202256281.844.54$4,592
Dec 202154771.323.90$3,879
Nov 202126177.435.24$2,018
Oct 202173079.795.71$5,825
Sep 202170269.865.35$4,901
Aug 2021681666.024.22$4,557
Jul 202168070.783.98$4,813
Jun 2021711469.493.38$4,981
May 202172363.483.02$4,580
Apr 202169360.362.76$4,173
Mar 202170061.302.72$4,291
Feb 202134057.805.55$1,965
Jan 202168850.412.81$3,450
Dec 2020852144.642.68$3,851
Nov 20201064838.772.71$4,240
Oct 20201213636.972.48$4,563
Sep 20201106137.091.99$4,201
Aug 2020781339.982.39$3,149
Jul 202075038.371.83$2,878
Jun 2020110234.901.69$3,842
May 2020102216.921.81$1,729
Apr 2020127314.751.80$1,879
Mar 2020138430.341.86$4,194
Feb 202055449.881.98$2,751
Jan 202089057.252.09$5,095
Dec 201982359.012.30$4,846
Nov 2019108255.302.75$5,978
Oct 2019139353.472.42$7,440
Sep 2019142855.052.66$7,838
Aug 20191332953.112.30$7,130
Jul 20191202456.272.46$6,811
Jun 2019992052.782.49$5,275
May 20191126558.482.74$6,728
Apr 2019914762.632.75$5,829
Mar 2019711856.803.06$4,088
Feb 2019721250.852.79$3,695
Jan 2019981346.033.23$4,553
Dec 2018131146.594.19$6,107
Nov 20181311452.934.24$6,993
Oct 2018682361.443.40$4,256
Sep 2018613859.543.11$3,750
Aug 2018643459.403.07$3,906
Jul 2018631265.142.93$4,139
Jun 2018681760.183.08$4,145
May 2018731165.382.90$4,805
Apr 2018641263.842.90$4,121
Mar 2018461261.222.79$2,850
Feb 201889461.782.77$5,509
Jan 201884262.874.01$5,289
Dec 2017138257.272.92$7,909
Nov 20171273555.423.12$7,147
Oct 201788149.292.98$4,341
Sep 201733047.523.09$1,568
Aug 2017762845.373.00$3,532
Jul 20171022043.873.09$4,536
Jun 20171002142.493.09$4,314
May 20171273245.373.26$5,866
Apr 2017133047.933.21$6,375
Mar 2017143046.772.98$6,688
Feb 2017126750.452.95$6,377
Jan 20171122249.413.42$5,609
Dec 2016921248.763.72$4,531
Nov 20161112742.492.64$4,788
Oct 2016874546.193.09$4,158
Sep 20161026441.553.10$4,437
Aug 20161324841.442.92$5,610
Jul 20161023241.622.92$4,339
Jun 20161205145.352.69$5,579
May 201610112742.521.99$4,547
Apr 201613316736.561.99$5,195
Mar 201611117433.011.79$3,976
Feb 20161029226.472.06$2,890
Jan 201610213727.352.36$3,114
Dec 201510510132.362.00$3,600
Nov 201512417338.792.17$5,185
Oct 201513717443.552.43$6,389
Sep 201514712642.992.76$6,667
Aug 201514946540.162.87$7,320
Jul 201512452948.152.95$7,529
Jun 201515061656.152.88$10,198
May 201518159255.212.96$11,743
Apr 201516510149.822.71$8,494
Mar 201515815542.892.93$7,232
Feb 201520122944.662.98$9,658
Jan 201517626343.433.10$8,459
Dec 201418717154.693.59$10,841
Nov 201426117670.464.25$19,138
Oct 20142245678.303.90$17,758
Sep 201416942586.164.05$16,280
Aug 201417510489.394.04$16,063
Jul 201417615696.564.18$17,647
Jun 2014191798.164.74$18,782
May 20142014494.734.73$19,249
Apr 201420711495.944.81$20,408
Mar 201421914995.895.06$21,753
Feb 201419512797.406.19$19,779
Jan 201421347090.404.86$21,540
Dec 201325843691.824.35$25,588
Nov 201322468888.853.74$22,474
Oct 201323663197.423.78$25,376
Sep 2013237371104.113.72$26,053
Aug 2013274101104.253.52$28,920
Jul 2013301156102.523.72$31,438
Jun 201335917994.403.93$34,594
May 201337422994.834.15$36,417
Apr 201338121793.964.28$36,728
Mar 201338030193.623.91$36,753
Feb 201329431391.233.42$27,892
Jan 201326541391.603.42$25,686
Dec 201208286.773.42$280
Nov 20120086.953.62$0
Oct 20120089.383.40$0
Sep 20120094.672.92$0
Aug 2012112192.662.91$1,080
Jul 20124612385.133.02$4,288
Jun 2012011579.822.52$290
May 20120091.612.49$0
Apr 201200101.652.00$0
Mar 201200105.052.22$0
Feb 201200101.102.57$0
Jan 20120098.092.73$0
Dec 20110096.873.24$0
Nov 20110095.723.31$0
Oct 20110084.983.65$0
Sep 20110083.623.99$0
Aug 20110083.404.15$0
Jul 20110094.144.52$0
Jun 20110092.904.64$0
May 20110098.134.40$0
Apr 201100105.964.33$0
Mar 20110096.364.06$0
Feb 20110085.644.18$0
Jan 20110086.504.59$0
Dec 20100085.734.35$0
Nov 20100080.843.80$0
Oct 20100078.103.51$0
Sep 20100072.633.98$0
Aug 20100073.684.42$0
Jul 20100072.554.74$0
Jun 20100070.364.91$0
May 20100071.124.24$0
Apr 20100081.694.12$0
Mar 20100078.394.39$0
Feb 20100073.585.44$0
Jan 20100074.365.96$0
Dec 20090071.445.48$0
Nov 20090074.593.75$0
Oct 20090072.544.11$0
Sep 20090065.543.06$0
Aug 20090067.423.22$0
Jul 20090061.133.46$0
Jun 20090066.163.90$0
May 20090054.743.93$0
Apr 20092046.773.59$94
Mar 20095442.144.06$227
Feb 20090032.814.63$0
Jan 20090035.865.37$0
Dec 20080037.105.98$0
Nov 20080055.496.86$0
Oct 20080075.246.92$0
Sep 200800101.767.88$0
Aug 200800114.228.48$0
Jul 200800131.0811.39$0
Jun 200800131.3313.03$0
May 200800123.1711.57$0
Apr 200800110.3110.45$0
Mar 200800101.909.66$0
Feb 20080092.538.77$0
Jan 20080090.388.21$0
Dec 200717088.337.30$1,502
Nov 2007325,69291.677.29$44,438
Oct 20070082.856.92$0
Sep 20075075.846.24$379
Aug 2007463,43669.066.39$25,126
Jul 2007994870.906.39$7,326
Jun 20079515662.007.55$7,068
May 20078919858.747.85$6,781
Apr 2007417159.617.81$2,998
Mar 20075638656.927.30$6,006
Feb 20075017255.108.22$4,168
Jan 2007691,07750.306.73$10,716
Dec 20066638756.656.92$6,416
Nov 20066151254.207.62$7,206
Oct 2006518554.906.01$3,311
Sep 200633060.085.04$1,983
Aug 20067613568.717.34$6,213
Jul 20068635569.376.34$8,218
Jun 20067811466.286.38$5,898
May 200611217266.016.42$8,498
Apr 20067724864.397.36$6,783
Mar 20061253756.707.08$7,350
Feb 2006130557.597.75$7,525
Jan 20063741,91060.598.93$39,723
Dec 200535018154.9413.42$21,657
Nov 200535453754.6910.59$25,046
Oct 200551919158.3413.80$32,913
Sep 20054123,67961.4512.08$69,756
Aug 20054133,24961.519.80$57,234
Jul 20053351,89555.697.84$33,520
Jun 20054173,34852.337.38$46,533
May 20053952,29345.226.65$33,113
Apr 20054463,64849.207.36$48,794
Mar 20054902,38050.377.15$41,710
Feb 20053812,51945.226.31$33,129
Jan 200549622543.166.32$22,830
Dec 20044362,51639.866.75$34,365
Nov 20045441,78445.286.33$35,926
Oct 200445819449.706.52$24,027
Sep 20044521,24443.245.28$26,118
Aug 20043814,31842.375.55$40,111
Jul 20049514538.286.08$4,519
Jun 2004203036.106.43$7,328
May 20041,22340937.486.49$48,494
Apr 20041,7948,93734.475.86$114,196
Mar 20041,2132,51834.365.53$55,604
Feb 20041,3583,84332.455.51$65,241
Jan 20042,0632,26232.036.30$80,328
Dec 20032,0625,01930.266.30$94,024
Nov 20034291,30928.804.60$18,370
Oct 20035994,16728.174.76$36,707
Sep 20031,0523,40126.314.75$43,831
Aug 20031,00880729.765.13$34,138
Jul 20039602,23929.415.17$39,811
Jun 20031,4571,44928.565.98$50,281
May 20031,6021,90326.595.97$53,963
Apr 20031,6211,41626.675.41$50,889
Mar 20031,7251631.146.10$53,814
Feb 20031,9831,44333.487.93$77,828
Jan 20031,9674,56130.315.58$85,079
Dec 20021,4554,72626.914.85$62,093
Nov 20021,2303,18524.664.14$43,508
Oct 20021,4181,62226.464.23$44,380
Sep 20021,56885227.443.64$46,123
Aug 20021,42076325.963.16$39,277
Jul 20021,7231,73624.583.06$47,667
Jun 20021,57726723.733.34$38,314
May 20021,5401,91724.663.58$44,847
Apr 20021,0442,96323.653.51$35,098
Mar 20025451,42922.003.10$16,424
Feb 20027591,54118.222.38$17,490
Jan 20021,4992,78217.172.38$32,347
Dec 20011,4448,61116.932.36$44,807
Nov 20011,4875,11118.072.41$39,165
Oct 20012,4801,64019.782.53$53,202
Sep 20013851,73824.262.25$13,253
Aug 200184844324.873.05$22,442
Jul 20011,8451,25823.933.20$48,173
Jun 20011,4232,95424.563.82$46,245
May 20011,02360525.524.31$28,713
Apr 200173720724.685.34$19,294
Mar 200120176624.545.38$9,051
Feb 200191041927.755.77$27,669
Jan 200144972027.478.40$18,381
Dec 200057358926.889.12$20,775
Nov 20005761,47932.215.66$26,921
Oct 200092722131.235.15$30,087
Sep 200058635631.875.19$20,522
Aug 200092937429.644.54$29,234
Jul 20009303,39828.534.09$40,430
Jun 200048790329.304.40$18,240
May 200015142527.263.68$5,680
Apr 200011612424.513.12$3,230
Mar 20001204728.422.86$3,545
Feb 20001202027.622.73$3,369
Jan 200012238725.272.48$4,043
Dec 199912520624.282.42$3,534
Nov 19991194823.192.43$2,876
Oct 199910551820.982.80$3,655
Sep 1999907621.752.62$2,157
Aug 19999149319.262.88$3,170
Jul 199910910617.892.37$2,201
Jun 199911880615.942.36$3,785
May 199912562215.792.32$3,417
Apr 199912168515.102.21$3,340
Mar 19991251,16612.471.84$3,702
Feb 19991036289.981.82$2,170
Jan 19991151,60610.381.90$4,245
Dec 19981113399.201.77$1,622
Nov 19988129710.892.19$1,531
Oct 19988639612.421.97$1,848
Sep 19989944512.592.08$2,173
Aug 199810237611.301.91$1,870
Jul 19987520311.742.24$1,335
Jun 19981991,34511.242.24$5,246
May 19983131,88112.622.21$8,100
Apr 199829744013.042.51$4,975
Mar 199828877612.802.31$5,479
Feb 199821019713.952.30$3,382
Jan 19983661,76014.702.15$9,173
Dec 19973271,51616.322.41$8,992
Nov 19974732,33218.193.09$15,806
Oct 199737228019.253.15$8,043
Sep 19976111,75917.742.95$16,037
Aug 19973063,52817.862.55$14,478
Jul 19972871,57217.582.25$8,578
Jun 19976372,98417.242.26$17,717
May 19978762,85618.972.31$23,211
Apr 19976731,67217.882.08$15,516
Mar 19976523,48918.951.94$19,121
Feb 19971,02768020.492.21$22,543
Jan 19976912,29723.483.54$24,355
Dec 19968301,62823.32$19,356
Nov 19968782,97221.97$19,290
Oct 19969342,68723.31$21,772
Sep 19961,3255,42522.22$29,442
Aug 19961,1337,28920.26$22,955
Jul 19962504,91119.55$4,888
Jun 19961,03484418.73$19,367
May 19965582,03619.43$10,842
Apr 19961,3222,01721.51$28,436
Mar 19961,0732,63419.38$20,795
Feb 19969061,96216.98$15,384
Jan 19967031,38017.07$12,000
Dec 19951,5191,47517.19$26,112
Nov 19951,1511,79016.00$18,416
Oct 19951,3701,37515.43$21,139
Sep 19951471,39516.18$2,378
Aug 19952,1651,88015.92$34,467
Jul 19952,01593315.24$30,709
Jun 199564937416.41$10,650
May 19951,2286617.56$21,564
Apr 19951,1691,22317.73$20,726
Mar 19951,2992,96016.44$21,356
Feb 19951,5172,50216.58$25,152
Jan 19951,6291,56215.92$25,934
Dec 19942,0714,10015.03$31,127
Nov 19942,00197515.90$31,816
Oct 19942,1263,65315.58$33,123
Sep 19941,9573,67015.29$29,923
Aug 19942,3758,41616.13$38,309
Jul 19941,9634,01917.56$34,470
Jun 19942,1812,10617.09$37,273
May 19942,8354,57815.88$45,020
Apr 19942,4116,39314.14$34,092
Mar 19942,2689,28312.46$28,259
Feb 19941,8809,26612.50$23,500
Jan 19942,0446,39012.66$25,877
Dec 19932,83112,19612.33$34,906
Nov 19932,86911,69914.49$41,572
Oct 19932,2414,78515.85$35,520
Sep 19932,6066,71815.03$39,168
Aug 199374910415.66$11,729
Jul 19938491,60115.46$13,126
Jun 19937601,99016.79$12,760
May 199346941517.68$8,292
Apr 19938092,57818.05$14,602
Mar 19935841,05718.14$10,594
Feb 199355896217.90$9,988
Jan 19935074,53016.93$8,584

How to read this page

The arithmetic is one multiplication per stream per month. Here it is, worked, on a real row from the table above.

Jan 2023 — as filed, then multipliedworked
Oil                    2 bbl  × $ 76.53 =       $153
Casinghead gas         0 Mcf  × $  3.39 =         $0

────────────────────────────────────────────────────
Month total                                     $153

The volumes are the state's, unchanged

Every barrel and every Mcf on this page is a number the Railroad Commission of Texas published in its monthly production query. Nothing is modelled, estimated or filled in.

The dollars are a multiplication, not a valuation

Volume × a published monthly price. It is not what the operator was paid: it takes no account of a contract, a differential, a transportation deduction, or the share any one owner holds.

Oil and gas are priced differently

Oil is a Texas realisation — the crude oil first purchase price. Gas is a benchmark, because no free Texas wellhead gas series exists at any date. The prices page publishes the difference rather than correcting it away.

A lease is not a well

The state reports oil on lease and gas on well, and this page is the lease grain. 02/O/1539 is the state's own key, not one this site invented.