LAMBERT, M. F.

Operated by HILCORP ENERGY COMPANY (P-5 386310) in the TOM OCONNOR (5450 SAND) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 4958District 02Field 90534700OilCasinghead gasSaveExport
Value, all time
$6.8 M
Jan 1993 – May 2026
Value, last 12 filed months
$931
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 39 leases and 84 wells, and the rule below applies to all of them.

Discovered
1963-10-02
as the register files it
Field class
Oil and gas
the register's own label
Between wells
no field rule filed
From a lease line
no field rule filed

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
OilDisposition165,997 bbl$5,903,722
Casinghead gasProduction421,283 Mcf$935,366
Total$6,839,087

160,277 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 (9)

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 28.3439, -97.1779. A lease has no coordinate of its own — that point is the mean of its wells, and they span 2.4 miles.

28.34751, -97.17812 · centre of the 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
66.7%
6 of 9 wells
With a plug date
11.1%
1 of 9 wells
Median depth
5,950 ft
9 wells filed one
Completion to plug
18.0 years
median over 1 well

What the state filed about each well

On the RRC proration schedule
666.7%
A plug date is filed
111.1%
BothOn the schedule and plugged. Neither fact cancels the other.
111.1%
NeitherNo plug date, and not on the schedule.
333.3%

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, 9 of 9 wells. Median 5,950 ft, with the middle half between 5,910 and 6,012 ft; the shallowest is 5,840 ft and the deepest 8,200 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, 9 of 9 wells, Dec 1981 – Oct 2023. This is the LAST completion filed on each wellbore, not the first — a well recompleted in 2019 counts once, in the 2010s.

Completions filed
Dec 1981 – Oct 2023
9 of 9 wells
Plug dates filed
May 2001
1 of 9 wells; 8 filed none

Last completion to plug: a median of 18.0 years across the 1 well that filed both dates, with the middle half between 18.0 years and 18.0 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

9 wells

42-391014461226,000 ftOct 2023Yes
42-39130343137 U6,012 ftMay 2023Yes
42-391302741368,200 ftMay 2019
42-39101399120 U5,840 ftAug 2011Yes
42-39101385475,919 ftJun 2009Yes
42-39101210156,507 ftMar 2009
42-39101493116 U5,850 ftSep 2004Yes
42-39101489265,910 ftMay 1983May 2001Yes
42-39101341495,950 ftDec 1981

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 202514066.483.13$931
May 202586160.553.23$5,211
Apr 2025138662.363.54$8,627
Mar 2025162767.704.27$10,997
Feb 2025154370.884.34$10,929
Jan 20251856774.324.28$14,036
Dec 20241877268.993.12$13,126
Nov 2024189769.052.20$13,066
Oct 20242231771.372.28$15,954
Sep 2024220069.612.36$15,314
Aug 2024218475.632.06$16,496
Jul 2024222179.932.15$17,747
Jun 2024194578.082.63$15,161
May 20244354878.812.20$34,388
Apr 20241843384.451.66$15,594
Mar 20241587880.301.55$12,808
Feb 20241026476.091.78$7,875
Jan 202465573.023.30$4,763
Dec 2023761371.262.61$5,450
Nov 20231981777.892.81$15,470
Oct 2023218085.443.09$18,626
Sep 2023256189.042.74$22,797
Aug 2023161080.522.67$12,964
Jul 20232332274.852.64$17,498
Jun 20232768668.962.26$19,227
May 202319328370.622.23$14,260
Apr 20231341178.122.24$10,493
Mar 202314516572.852.39$10,958
Feb 202311813975.112.47$9,206
Jan 202319033676.533.39$15,679
Dec 202239434176.415.73$32,059
Nov 202230057985.005.65$28,769
Oct 202227317787.185.86$24,838
Sep 202229027384.888.16$26,844
Aug 202234919794.529.13$34,786
Jul 202234067101.587.54$35,043
Jun 202219367115.097.98$22,747
May 202225284109.378.43$28,270
Apr 2022347189104.226.84$37,457
Mar 2022318245108.885.08$35,868
Feb 202229313891.054.86$27,348
Jan 202242317381.844.54$35,403
Dec 202136413071.323.90$26,467
Nov 202132112177.435.24$25,489
Oct 202135344379.795.71$30,697
Sep 202140918969.865.35$29,584
Aug 202140416466.024.22$27,364
Jul 202138726870.783.98$28,459
Jun 202119711569.493.38$14,078
May 20211657663.483.02$10,704
Apr 202115825160.362.76$10,229
Mar 202127729361.302.72$17,776
Feb 202119228957.805.55$12,701
Jan 202122952050.412.81$13,005
Dec 2020245044.642.68$10,937
Nov 202025612938.772.71$10,274
Oct 20202928036.972.48$10,994
Sep 20202978737.091.99$11,189
Aug 202030016439.982.39$12,385
Jul 202042717838.371.83$16,709
Jun 20202927834.901.69$10,323
May 202022210016.921.81$3,938
Apr 20202776014.751.80$4,194
Mar 20204357730.341.86$13,341
Feb 202044410749.881.98$22,359
Jan 202054418857.252.09$31,538
Dec 201955014459.012.30$32,787
Nov 201957321255.302.75$32,270
Oct 201960729553.472.42$33,170
Sep 201960414455.052.66$33,633
Aug 201952714953.112.30$28,332
Jul 201963138956.272.46$36,463
Jun 201964225252.782.49$34,513
May 20195361,13258.482.74$34,447
Apr 20193195762.632.75$20,136
Mar 20192902456.803.06$16,545
Feb 20192382350.852.79$12,167
Jan 2019246046.033.23$11,323
Dec 20181691846.594.19$7,949
Nov 20181841552.934.24$9,803
Oct 20182663661.443.40$16,465
Sep 20182893459.543.11$17,313
Aug 20182845459.403.07$17,035
Jul 20182169865.142.93$14,358
Jun 20182021660.183.08$12,206
May 2018722865.382.90$4,789
Apr 201823063.842.90$1,468
Mar 201891061.222.79$5,571
Feb 2018110061.782.77$6,796
Jan 201812613762.874.01$8,471
Dec 20171111257.272.92$6,392
Nov 201711319755.423.12$6,877
Oct 20171224849.292.98$6,157
Sep 2017374247.523.09$1,888
Aug 2017899145.373.00$4,311
Jul 20171328943.873.09$6,066
Jun 201721711842.493.09$9,585
May 20172258745.373.26$10,492
Apr 20172351747.933.21$11,318
Mar 20172621446.772.98$12,296
Feb 20171922850.452.95$9,769
Jan 201717712149.413.42$9,159
Dec 20161556448.763.72$7,796
Nov 201617011642.492.64$7,530
Oct 20161788546.193.09$8,484
Sep 201616810641.553.10$7,309
Aug 201615419241.442.92$6,943
Jul 20167810041.622.92$3,539
Jun 201622319145.352.69$10,626
May 201619716442.521.99$8,703
Apr 20162606236.561.99$9,629
Mar 20163017433.011.79$10,069
Feb 20162732626.472.06$7,280
Jan 201611616527.352.36$3,563
Dec 201586132.362.00$2,785
Nov 20159715838.792.17$4,105
Oct 2015100043.552.43$4,355
Sep 2015988842.992.76$4,456
Aug 201510223240.162.87$4,763
Jul 20159832548.152.95$5,676
Jun 20159230856.152.88$6,054
May 20158711755.212.96$5,149
Apr 20156728649.822.71$4,112
Mar 20157936242.892.93$4,451
Feb 201510232544.662.98$5,523
Jan 201511235943.433.10$5,977
Dec 201411448954.693.59$7,991
Nov 20149830670.464.25$8,206
Oct 201410952078.303.90$10,563
Sep 201413030586.164.05$12,435
Aug 201410131489.394.04$10,295
Jul 201413839996.564.18$14,993
Jun 201418764098.164.74$21,388
May 201426034094.734.73$26,237
Apr 201420844795.944.81$22,105
Mar 20141913,70095.895.06$37,025
Feb 20149349197.406.19$12,098
Jan 20141646790.404.86$15,151
Dec 201321211991.824.35$19,984
Nov 201323320888.853.74$21,480
Oct 201325911897.423.78$25,678
Sep 2013245190104.113.72$26,213
Aug 2013306311104.253.52$32,996
Jul 2013285259102.523.72$30,181
Jun 201321017594.403.93$20,512
May 2013225394.834.15$21,349
Apr 201330714893.964.28$29,480
Mar 201315916993.623.91$15,547
Feb 201326010191.233.42$24,065
Jan 201329712191.603.42$27,619
Dec 201218217086.773.42$16,374
Nov 201222611386.953.62$20,060
Oct 201230718789.383.40$28,075
Sep 20124932,88294.672.92$55,083
Aug 201235987192.662.91$35,798
Jul 201220218585.133.02$17,755
Jun 201218923579.822.52$15,678
May 201219720791.612.49$18,562
Apr 2012234333101.652.00$24,451
Mar 2012248160105.052.22$26,408
Feb 2012205171101.102.57$21,165
Jan 201223412798.092.73$23,300
Dec 201121813496.873.24$21,552
Nov 20112351895.723.31$22,554
Oct 201121737784.983.65$19,816
Sep 201117247683.623.99$16,280
Aug 201117238283.404.15$15,930
Jul 201117946994.144.52$18,970
Jun 201118548392.904.64$19,428
May 201122732398.134.40$23,698
Apr 201134288105.964.33$36,620
Mar 201117425996.364.06$17,817
Feb 20117429285.644.18$7,558
Jan 201114857486.504.59$15,436
Dec 201020164685.734.35$20,040
Nov 201019031180.843.80$16,540
Oct 201020910278.103.51$16,681
Sep 20102442472.633.98$17,817
Aug 20103158273.684.42$23,572
Jul 201030312972.554.74$22,594
Jun 20102794370.364.91$19,842
May 20102141771.124.24$15,292
Apr 201027811381.694.12$23,176
Mar 20102949878.394.39$23,477
Feb 201017312973.585.44$13,431
Jan 201034825174.365.96$27,374
Dec 200939544671.445.48$30,665
Nov 200926849174.593.75$21,832
Oct 20092812,05572.544.11$28,830
Sep 200922423265.543.06$15,392
Aug 200921755067.423.22$16,400
Jul 200922035161.133.46$14,665
Jun 200921226866.163.90$15,070
May 200924823454.743.93$14,494
Apr 200927723446.773.59$13,795
Mar 200930925142.144.06$14,040
Feb 200923729132.814.63$9,124
Jan 200912330235.865.37$6,033
Dec 200812133037.105.98$6,462
Nov 200812237255.496.86$9,322
Oct 200814933775.246.92$13,543
Sep 2008130369101.767.88$16,135
Aug 200897372114.228.48$14,235
Jul 200887371131.0811.39$15,629
Jun 200880429131.3313.03$16,097
May 200877484123.1711.57$15,086
Apr 200870499110.3110.45$12,939
Mar 2008158626101.909.66$22,150
Feb 200814941492.538.77$17,418
Jan 200816342090.388.21$18,178
Dec 200710747888.337.30$12,942
Nov 200710645391.677.29$13,020
Oct 200712665782.856.92$14,987
Sep 200711157575.846.24$12,009
Aug 200714757069.066.39$13,793
Jul 200722860870.906.39$20,049
Jun 200721449162.007.55$16,974
May 200742824858.747.85$27,087
Apr 200737224059.617.81$24,048
Mar 200738724856.927.30$23,839
Feb 200750322455.108.22$29,556
Jan 200728946550.306.73$17,665
Dec 200634534156.656.92$21,903
Nov 200631233054.207.62$19,424
Oct 200633049654.906.01$21,100
Sep 200631548060.085.04$21,343
Aug 200629949668.717.34$24,185
Jul 20064251,17869.376.34$36,954
Jun 200624276066.286.38$20,892
May 20063691,17866.016.42$31,926
Apr 20065281,63564.397.36$46,032
Mar 20063891,48856.707.08$32,596
Feb 200627986857.597.75$22,796
Jan 200631196260.598.93$27,437
Dec 200546958854.9413.42$33,655
Nov 20051761,03354.6910.59$20,563
Oct 20050058.3413.80$0
Sep 20050061.4512.08$0
Aug 20050061.519.80$0
Jul 20050055.697.84$0
Jun 20050052.337.38$0
May 20050045.226.65$0
Apr 20050049.207.36$0
Mar 20050050.377.15$0
Feb 20050045.226.31$0
Jan 20050043.166.32$0
Dec 200419039.866.75$757
Nov 200410760045.286.33$8,643
Oct 20046731949.706.52$5,408
Sep 200419260043.245.28$11,472
Aug 200415262042.375.55$9,882
Jul 20042164,68838.286.08$36,791
Jun 20049359936.106.43$7,211
May 200411261937.486.49$8,218
Apr 200410160034.475.86$6,997
Mar 20045892934.365.53$7,130
Feb 20045587132.455.51$6,584
Jan 20046693132.036.30$7,979
Dec 20036993130.266.30$7,955
Nov 20037190128.804.60$6,185
Oct 20038393028.174.76$6,765
Sep 200319060026.314.75$7,849
Aug 200324362029.765.13$10,412
Jul 200329058829.415.17$11,569
Jun 200335739028.565.98$12,529
May 200334640326.595.97$11,607
Apr 200333469026.675.41$12,639
Mar 200342571431.146.10$17,587
Feb 200329764433.487.93$15,048
Jan 20032701,55030.315.58$16,836
Dec 200223878126.914.85$10,195
Nov 200216978024.664.14$7,394
Oct 2002213026.464.23$5,636
Sep 200227612127.443.64$8,013
Aug 200216015525.963.16$4,644
Jul 2002358024.583.06$8,800
Jun 2002319023.733.34$7,570
May 200235510324.663.58$9,123
Apr 2002378023.653.51$8,940
Mar 2002392022.003.10$8,624
Feb 2002410018.222.38$7,470
Jan 2002467017.172.38$8,018
Dec 20013127,66816.932.36$23,412
Nov 20014184,83918.072.41$19,194
Oct 200152567819.782.53$12,099
Sep 200141257824.262.25$11,296
Aug 20014531,63024.873.05$16,243
Jul 20015282,52423.933.20$20,704
Jun 20016181,25024.563.82$19,958
May 20016442,04125.524.31$25,226
Apr 20012111,00324.685.34$10,559
Mar 20012801,86524.545.38$16,898
Feb 200160960527.755.77$20,389
Jan 200197635327.478.40$29,775
Dec 200016887426.889.12$12,489
Nov 20001,09480832.215.66$39,809
Oct 20001,0992,52731.235.15$47,324
Sep 20001,0902,70631.875.19$48,773
Aug 20001,1053,16229.644.54$47,110
Jul 20001,0153,14528.534.09$41,820
Jun 20009322,83929.304.40$39,791
May 20009173,16627.263.68$36,648
Apr 20009302,42224.513.12$30,341
Mar 20001,2944,28928.422.86$49,041
Feb 20002,6164,18827.622.73$83,673
Jan 20009011,16825.272.48$25,665
Dec 19991,30326824.282.42$32,286
Nov 19999921,00323.192.43$25,446
Oct 19998831,28620.982.80$22,131
Sep 19998394,52621.752.62$30,101
Aug 19998676,20219.262.88$34,533
Jul 19991,0794,95117.892.37$31,049
Jun 19999766,42915.942.36$30,743
May 19991,1925,54615.792.32$31,694
Apr 19999875,52315.102.21$27,099
Mar 19991,0725,22312.471.84$22,969
Feb 19991,1125,9349.981.82$21,885
Jan 19991,3506,26210.381.90$25,910
Dec 19981,0846,1199.201.77$20,824
Nov 19981,0365,71510.892.19$23,773
Oct 19981,0936,09312.421.97$25,573
Sep 19989746,03112.592.08$24,823
Aug 19981,0134,17911.301.91$19,418
Jul 19989943,35111.742.24$19,167
Jun 19981,0584,28811.242.24$21,485
May 19981,1933,88012.622.21$23,616
Apr 19981,3513,77113.042.51$27,065
Mar 19981,2711,56812.802.31$19,890
Feb 19981,4832,13913.952.30$25,606
Jan 19981,7561,58414.702.15$29,226
Dec 19971,5301,03816.322.41$27,472
Nov 19971,3191,37918.193.09$28,251
Oct 19971,3701,59819.253.15$31,406
Sep 19979781,65117.742.95$22,228
Aug 199765796917.862.55$14,210
Jul 19979381,60817.582.25$20,103
Jun 19978511,35317.242.26$17,725
May 19978251,26318.972.31$18,566
Apr 19971,4301,54717.882.08$28,790
Mar 19971,0611,64918.951.94$23,304
Feb 199766247320.492.21$14,608
Jan 19971,22862823.483.54$31,056
Dec 199689856123.32$20,941
Nov 199699381121.97$21,816
Oct 19961,2831,51123.31$29,907
Sep 19961,1181,34922.22$24,842
Aug 19969321,19320.26$18,882
Jul 199681496519.55$15,914
Jun 19969261,09218.73$17,344
May 19967771,27319.43$15,097
Apr 199643239321.51$9,292
Mar 199660176719.38$11,647
Feb 19967651,33216.98$12,990
Jan 199681299817.07$13,861
Dec 19957931,14617.19$13,632
Nov 19951,1342,30416.00$18,144
Oct 19958982,17815.43$13,856
Sep 19958117,11216.18$13,122
Aug 19959787,48415.92$15,570
Jul 19951,1397,87015.24$17,358
Jun 19951,1038,66516.41$18,100
May 19959242,27417.56$16,225
Apr 19959931,93917.73$17,606
Mar 19959653,78916.44$15,865
Feb 19958192,93016.58$13,579
Jan 19957292,69515.92$11,606
Dec 19948502,63615.03$12,776
Nov 19947223,07915.90$11,480
Oct 19947333,21615.58$11,420
Sep 19948792,51115.29$13,440
Aug 19948962,71116.13$14,452
Jul 19941,2033,97517.56$21,125
Jun 19941,2725,59917.09$21,738
May 19941,1877,37315.88$18,850
Apr 19941,1597,45914.14$16,388
Mar 19941,1154,59312.46$13,893
Feb 19941,2544,24612.50$15,675
Jan 19948293,55312.66$10,495
Dec 19931,2484,02112.33$15,388
Nov 19938364,04814.49$12,114
Oct 199379394415.85$12,569
Sep 19939062,72815.03$13,617
Aug 19938332,69315.66$13,045
Jul 19931,1333,20115.46$17,516
Jun 19937722,77316.79$12,962
May 19938736,21817.68$15,435
Apr 19939496,24218.05$17,129
Mar 19936224,91118.14$11,283
Feb 19935684,28117.90$10,167
Jan 19936544,63516.93$11,072

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.

Jun 2025 — as filed, then multipliedworked
Oil                   14 bbl  × $ 66.48 =       $931
Casinghead gas         0 Mcf  × $  3.13 =         $0

────────────────────────────────────────────────────
Month total                                     $931

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/4958 is the state's own key, not one this site invented.