O'BRIEN, G. W. ETAL

Operated by SUNDOWN ENERGY LP (P-5 829482) in the WAGON WHEEL (PENN) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 26670District 08Field 94640500OilCasinghead gasSaveExport
Value, all time
$214.6 M
Jan 1993 – May 2026
Value, last 12 filed months
$16.6 M
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 7 leases and 212 wells, and the rule below applies to all of them.

Discovered
1979-03-01
as the register files it
Field class
Oil and gas
the register's own label
Between wells
1,200 ft
minimum
From a lease line
467 ft
minimum

A drilling unit in this field needs at least 40 acres. The field rule took effect on 1980-06-09.

The Commission's schedule remark for this field reads: OPTIONAL 40 ACRE UNITS/DIAG 2100'

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
OilDisposition3,067,267 bbl$190,538,854
Casinghead gasProduction7,217,391 Mcf$24,059,661
Total$214,598,516

78,642 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 (40)

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 31.5910, -102.9986. A lease has no coordinate of its own — that point is the mean of its wells, and they span 9.3 miles.

31.63572, -103.00590 · centre of 36 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
10.0%
4 of 40 wells
With a plug date
7.5%
3 of 40 wells
Median depth
10,783 ft
40 wells filed one
Completion to plug
12.1 years
median over 3 wells

What the state filed about each well

On the RRC proration schedule
410.0%
A plug date is filed
37.5%
BothOn the schedule and plugged. Neither fact cancels the other.
37.5%
NeitherNo plug date, and not on the schedule.
3690.0%

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, 40 of 40 wells. Median 10,783 ft, with the middle half between 9,551 and 10,920 ft; the shallowest is 4,146 ft and the deepest 15,850 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, 39 of 40 wells, Sep 1981 – Sep 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
Sep 1981 – Sep 2023
39 of 40 wells; 1 filed none
Plug dates filed
Dec 2022 – Oct 2024
3 of 40 wells; 37 filed none

Last completion to plug: a median of 12.1 years across the 3 wells that filed both dates, with the middle half between 8.9 years and 27.3 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

40 wells

42-4753784720549,416 ft
42-47537729204410,838 ftSep 2023
42-47537432202610,852 ftFeb 2023
42-47532214121815,850 ftFeb 2020Yes
42-4753775920089,478 ftSep 2019
42-47537666203611,064 ftSep 2019
42-4753784620119,472 ftAug 2019
42-4753776220489,512 ftAug 2019
42-4753722320079,431 ftJul 2019
42-4753784520109,564 ftJun 2019
42-47537760200910,874 ftMay 2019
42-47537731203710,774 ftApr 2019
42-47537644203910,821 ftApr 2019
42-47537640203510,912 ftMar 2019
42-47537639203410,977 ftMar 2019
42-47537665201910,720 ftMar 2019
42-47537464202510,859 ftDec 2018
42-47537599203810,760 ftDec 2018
42-47537630204311,408 ftNov 2018
42-47537597201310,792 ftNov 2018
42-49533954201710,454 ftAug 2018
42-47537584201410,611 ftAug 2018
42-47537452202310,983 ftJul 2018
42-47537486202010,876 ftJul 2018
42-47537433202711,160 ftJun 2018
42-47537434202910,981 ftJun 2018
42-47537453202410,650 ftJun 2018
42-475375002021R10,945 ftJun 2018
42-47537385201810,895 ftFeb 2018
42-4753738620214,146 ftJan 2018
42-47537383202210,802 ftDec 2017
42-47537224200210,533 ftOct 2017
42-47537220200110,750 ftSep 2017
42-47537219200010,770 ftAug 2017
42-47532396122611,800 ftApr 2017Dec 2022Yes
42-4753368315199,300 ftSep 2012Oct 2024Yes
42-47534863160011,050 ftJul 2005
42-4753262312279,010 ftApr 1999
42-4753236812239,000 ftOct 1997
42-4753234412209,000 ftSep 1981Jan 2024Yes

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 202620,7060106.413.05$2,203,325
Apr 202616,43649,85798.932.87$1,769,089
Mar 202617,52154,96189.753.15$1,745,606
Feb 202614,35846,01063.503.75$1,084,285
Jan 202614,63346,90859.138.00$1,240,416
Dec 202517,25550,89856.664.41$1,202,300
Nov 202518,14153,31658.593.93$1,272,223
Oct 202519,317059.383.30$1,147,043
Sep 202517,21837,87562.743.08$1,196,796
Aug 202516,55250,50763.933.01$1,210,436
Jul 202516,73550,16066.743.32$1,283,184
Jun 202516,20150,88166.483.13$1,236,235
May 202517,19853,11760.553.23$1,213,030
Apr 202518,18052,15662.363.54$1,318,500
Mar 202518,46156,72167.704.27$1,491,913
Feb 202517,45151,05270.884.34$1,458,535
Jan 202520,62654,02774.324.28$1,764,089
Dec 202420,59258,08668.993.12$1,601,950
Nov 202420,51055,69469.052.20$1,538,655
Oct 202419,10555,39171.372.28$1,489,893
Sep 202419,39657,06969.612.36$1,485,087
Aug 202421,19162,56675.632.06$1,731,788
Jul 202424,04262,67079.932.15$2,056,204
Jun 202422,54955,04178.082.63$1,905,603
May 202422,29656,54878.812.20$1,881,465
Apr 202422,61457,88884.451.66$2,005,800
Mar 202422,84354,66780.301.55$1,918,761
Feb 202423,00259,53476.091.78$1,856,409
Jan 202426,32565,38573.023.30$2,137,869
Dec 202325,22865,62671.262.61$1,969,078
Nov 202324,64564,59777.892.81$2,100,959
Oct 202326,95671,52385.443.09$2,523,932
Sep 202325,85073,55889.042.74$2,502,868
Aug 202329,36082,41180.522.67$2,584,342
Jul 202330,62583,17774.852.64$2,512,018
Jun 202331,86084,89868.962.26$2,388,806
May 202333,62384,26070.622.23$2,562,137
Apr 202328,80569,07278.122.24$2,404,813
Mar 202330,07369,10472.852.39$2,356,195
Feb 202327,32360,24575.112.47$2,200,775
Jan 202324,22249,46276.533.39$2,021,273
Dec 202218,50340,41676.415.73$1,645,361
Nov 202217,36743,35785.005.65$1,720,997
Oct 202220,80251,28987.185.86$2,114,265
Sep 202219,34954,17984.888.16$2,084,643
Aug 202219,32455,85894.529.13$2,336,329
Jul 202221,88471,753101.587.54$2,764,144
Jun 202221,05866,013115.097.98$2,950,164
May 202225,07573,055109.378.43$3,358,528
Apr 202223,98360,742104.226.84$2,914,838
Mar 202227,01177,310108.885.08$3,333,414
Feb 202225,75868,69191.054.86$2,679,024
Jan 202225,54375,58881.844.54$2,433,433
Dec 202128,17877,42171.323.90$2,311,529
Nov 202123,80965,92077.435.24$2,188,744
Oct 202129,35780,08479.795.71$2,799,985
Sep 202127,37379,08169.865.35$2,335,434
Aug 202130,07084,26966.024.22$2,340,886
Jul 202125,88872,30970.783.98$2,120,293
Jun 202130,16166,86069.493.38$2,321,916
May 202134,69281,59163.483.02$2,448,463
Apr 202127,16171,79160.362.76$1,837,468
Mar 202132,49877,44361.302.72$2,202,535
Feb 202125,58761,75057.805.55$1,821,515
Jan 202132,15775,33750.412.81$1,832,752
Dec 202037,85587,66544.642.68$1,924,391
Nov 202040,24594,94638.772.71$1,817,277
Oct 202039,90594,96136.972.48$1,710,642
Sep 202035,93281,28137.091.99$1,494,552
Aug 202038,36192,19939.982.39$1,753,577
Jul 202044,18094,90538.371.83$1,868,400
Jun 202043,71591,10634.901.69$1,679,651
May 202042,72694,84316.921.81$895,040
Apr 202046,25794,60014.751.80$852,985
Mar 202046,42995,60530.341.86$1,586,121
Feb 202049,63896,68649.881.98$2,667,447
Jan 202047,12093,57457.252.09$2,893,633
Dec 201963,290121,28459.012.30$4,014,225
Nov 201963,523136,36655.302.75$3,887,924
Oct 201979,456156,22953.472.42$4,626,358
Sep 201977,941138,98855.052.66$4,659,982
Aug 201965,147125,07153.112.30$3,748,166
Jul 201961,060124,73156.272.46$3,742,692
Jun 201969,325118,11452.782.49$3,953,219
May 201963,473114,40758.482.74$4,025,413
Apr 201946,38392,64962.632.75$3,159,817
Mar 201942,23777,21056.803.06$2,635,486
Feb 201926,12542,22050.852.79$1,446,344
Jan 201930,80851,64246.033.23$1,584,802
Dec 201825,59144,76646.594.19$1,379,650
Nov 201824,72842,96252.934.24$1,490,893
Oct 201823,58137,49161.443.40$1,576,214
Sep 201820,54633,81559.543.11$1,328,406
Aug 201823,62935,71759.403.07$1,513,091
Jul 201826,13942,45565.142.93$1,827,167
Jun 201819,39741,81860.183.08$1,295,982
May 201823,51147,68065.382.90$1,675,459
Apr 201823,01043,40763.842.90$1,594,873
Mar 201819,09430,72261.222.79$1,254,552
Feb 201811,63218,93761.782.77$771,007
Jan 20186,28210,86762.874.01$438,519
Dec 20176,0779,91857.272.92$377,005
Nov 20178,71713,47755.423.12$525,122
Oct 201712,56417,83049.292.98$672,479
Sep 20175,0204,14447.523.09$251,344
Aug 201752774845.373.00$26,157
Jul 20170043.873.09$0
Jun 20170042.493.09$0
May 20170045.373.26$0
Apr 20170047.933.21$0
Mar 20170046.772.98$0
Feb 20170050.452.95$0
Jan 20170049.413.42$0
Dec 20160048.763.72$0
Nov 20160042.492.64$0
Oct 20160046.193.09$0
Sep 20160041.553.10$0
Aug 20160041.442.92$0
Jul 20160041.622.92$0
Jun 20160045.352.69$0
May 20160042.521.99$0
Apr 20160036.561.99$0
Mar 20160033.011.79$0
Feb 20161624626.472.06$931
Jan 20162943327.352.36$1,817
Dec 20152848432.362.00$1,875
Nov 20152847138.792.17$2,107
Oct 20152953043.552.43$2,549
Sep 20152953242.992.76$2,714
Aug 20155356640.162.87$3,754
Jul 20155758548.152.95$4,467
Jun 20153358156.152.88$3,528
May 20152958355.212.96$3,324
Apr 20152755449.822.71$2,845
Mar 20152748642.892.93$2,584
Feb 20152550044.662.98$2,605
Jan 20152857643.433.10$3,002
Dec 20142858754.693.59$3,639
Nov 20142853970.464.25$4,265
Oct 20142863078.303.90$4,650
Sep 20142762086.164.05$4,834
Aug 20142767889.394.04$5,149
Jul 20142763596.564.18$5,261
Jun 20142655498.164.74$5,176
May 20142750694.734.73$4,949
Apr 20142667295.944.81$5,726
Mar 20142873795.895.06$6,412
Feb 20142569697.406.19$6,745
Jan 20142880090.404.86$6,420
Dec 20132887491.824.35$6,377
Nov 20132764488.853.74$4,806
Oct 2013281,01297.423.78$6,552
Sep 2013271,026104.113.72$6,625
Aug 201327619104.253.52$4,995
Jul 2013281,005102.523.72$6,607
Jun 2013271,14694.403.93$7,056
May 2013531,19794.834.15$9,992
Apr 20134598393.964.28$8,438
Mar 2013591,17593.623.91$10,121
Feb 20133599391.233.42$6,589
Jan 2013311,16391.603.42$6,817
Dec 2012641,23986.773.42$9,791
Nov 2012581,17986.953.62$9,317
Oct 2012351,16989.383.40$7,103
Sep 2012281,28094.672.92$6,386
Aug 2012291,36792.662.91$6,663
Jul 2012301,38785.133.02$6,744
Jun 2012281,05679.822.52$4,895
May 2012301,42591.612.49$6,294
Apr 2012291,393101.652.00$5,729
Mar 2012291,467105.052.22$6,306
Feb 2012271,557101.102.57$6,732
Jan 2012521,07998.092.73$8,051
Dec 2011561,54796.873.24$10,437
Nov 2011551,44995.723.31$10,063
Oct 2011561,50084.983.65$10,232
Sep 2011281,31183.623.99$7,567
Aug 2011261,43183.404.15$8,106
Jul 2011431,42494.144.52$10,481
Jun 2011502,00892.904.64$13,962
May 2011361,35798.134.40$9,510
Apr 2011341,170105.964.33$8,673
Mar 2011341,15096.364.06$7,942
Feb 2011581,07185.644.18$9,444
Jan 2011701,29386.504.59$11,988
Dec 2010511,66585.734.35$11,611
Nov 2010491,48280.843.80$9,586
Oct 2010512,08178.103.51$11,285
Sep 2010492,10972.633.98$11,952
Aug 2010522,10873.684.42$13,147
Jul 2010872,16772.554.74$16,576
Jun 20101242,02570.364.91$18,668
May 20101092,24071.124.24$17,239
Apr 20101212,36481.694.12$19,631
Mar 2010993,37778.394.39$22,581
Feb 2010901,96873.585.44$17,333
Jan 20102422,76074.365.96$34,456
Dec 20092582,76571.445.48$33,594
Nov 20091712,72574.593.75$22,978
Oct 20092522,65072.544.11$29,172
Sep 20091782,31065.543.06$18,746
Aug 20091031,63067.423.22$12,190
Jul 20091694,67861.133.46$26,538
Jun 200924916,18166.163.90$79,499
May 200914515,03054.743.93$66,941
Apr 200922011,71346.773.59$52,310
Mar 200922011,14942.144.06$54,525
Feb 20092538,02732.814.63$45,490
Jan 20092895,98035.865.37$42,482
Dec 20082666,04137.105.98$45,977
Nov 20083395,86655.496.86$59,054
Oct 20082366,22975.246.92$60,874
Sep 20082256,149101.767.88$71,332
Aug 20081275,678114.228.48$62,673
Jul 20081982,130131.0811.39$50,213
Jun 20082562,325131.3313.03$63,921
May 20082752,447123.1711.57$62,194
Apr 20082542,324110.3110.45$52,316
Mar 20082782,439101.909.66$51,899
Feb 20081751,18192.538.77$26,551
Jan 20082311,89090.388.21$36,387
Dec 20072661,97088.337.30$37,881
Nov 20071492,01891.677.29$28,373
Oct 20071781,95682.856.92$28,287
Sep 20071441,62475.846.24$21,061
Aug 20071951,82669.066.39$25,131
Jul 20072412,27970.906.39$31,645
Jun 20072402,05962.007.55$30,422
May 20072252,36358.747.85$31,757
Apr 20072002,30259.617.81$29,890
Mar 20072862,22356.927.30$32,511
Feb 20073922,04255.108.22$38,376
Jan 20072252,26250.306.73$26,534
Dec 2006831,55756.656.92$15,474
Nov 2006491,34354.207.62$12,886
Oct 20061371,21854.906.01$14,846
Sep 20063131,47660.085.04$26,240
Aug 20063001,59368.717.34$32,305
Jul 200611767069.376.34$12,366
Jun 20061471,46466.286.38$19,089
May 20062501,91266.016.42$28,787
Apr 20063102,02564.397.36$34,866
Mar 20062582,89756.707.08$35,148
Feb 20061993,59457.597.75$39,318
Jan 20061271,85360.598.93$24,248
Dec 20051022,39454.9413.42$37,720
Nov 20050054.6910.59$0
Oct 20050058.3413.80$0
Sep 20054061.4512.08$246
Aug 20050061.519.80$0
Jul 20050055.697.84$0
Jun 20051641,18752.337.38$17,343
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 20040039.866.75$0
Nov 20040045.286.33$0
Oct 20040049.706.52$0
Sep 20040043.245.28$0
Aug 20040042.375.55$0
Jul 20040038.286.08$0
Jun 20040036.106.43$0
May 20040037.486.49$0
Apr 20040034.475.86$0
Mar 20040034.365.53$0
Feb 20040032.455.51$0
Jan 20040032.036.30$0
Dec 20030030.266.30$0
Nov 20030028.804.60$0
Oct 20030028.174.76$0
Sep 20030026.314.75$0
Aug 20030029.765.13$0
Jul 20030029.415.17$0
Jun 20030028.565.98$0
May 20030026.595.97$0
Apr 20030026.675.41$0
Mar 20030031.146.10$0
Feb 20030033.487.93$0
Jan 20030030.315.58$0
Dec 20020026.914.85$0
Nov 20020024.664.14$0
Oct 20020026.464.23$0
Sep 20020027.443.64$0
Aug 20020025.963.16$0
Jul 20020024.583.06$0
Jun 20020023.733.34$0
May 20020024.663.58$0
Apr 20020023.653.51$0
Mar 20020022.003.10$0
Feb 20020018.222.38$0
Jan 20020017.172.38$0
Dec 20010016.932.36$0
Nov 20010018.072.41$0
Oct 20010019.782.53$0
Sep 20010024.262.25$0
Aug 20010024.873.05$0
Jul 20010023.933.20$0
Jun 20010024.563.82$0
May 20010025.524.31$0
Apr 20010024.685.34$0
Mar 20010024.545.38$0
Feb 20010027.755.77$0
Jan 20010027.478.40$0
Dec 20000026.889.12$0
Nov 20000032.215.66$0
Oct 20000031.235.15$0
Sep 20000031.875.19$0
Aug 20000029.644.54$0
Jul 20000028.534.09$0
Jun 20000029.304.40$0
May 20000027.263.68$0
Apr 20000024.513.12$0
Mar 20000028.422.86$0
Feb 20000027.622.73$0
Jan 20000025.272.48$0
Dec 19990024.282.42$0
Nov 19990023.192.43$0
Oct 19990020.982.80$0
Sep 19990021.752.62$0
Aug 19990019.262.88$0
Jul 19990017.892.37$0
Jun 19990015.942.36$0
May 19990015.792.32$0
Apr 199911015.102.21$166
Mar 199930971712.471.84$5,171
Feb 19992408879.981.82$4,008
Jan 19993121,07010.381.90$5,272
Dec 19983199299.201.77$4,582
Nov 19983901,04410.892.19$6,529
Oct 19983501,17112.421.97$6,653
Sep 19984081,19512.592.08$7,625
Aug 19984051,36211.301.91$7,174
Jul 19984621,41011.742.24$8,578
Jun 19987301,60411.242.24$11,794
May 19986691,59212.622.21$11,955
Apr 19987221,56713.042.51$13,341
Mar 19985411,66912.802.31$10,779
Feb 19985061,54313.952.30$10,606
Jan 19986471,74314.702.15$13,267
Dec 19971,0952,67116.322.41$24,310
Nov 19971,2592,67918.193.09$31,175
Oct 19971,4033,09419.253.15$36,753
Sep 19975371,46717.742.95$13,861
Aug 19975751,56217.862.55$14,260
Jul 19974851,61617.582.25$12,157
Jun 199741062017.242.26$8,468
May 199746765818.972.31$10,378
Apr 199746165417.882.08$9,605
Mar 19975431,16018.951.94$12,539
Feb 199749648920.492.21$11,242
Jan 199770459823.483.54$18,647
Dec 19967321,13623.32$17,070
Nov 19967251,14121.97$15,928
Oct 19967971,19123.31$18,578
Sep 19967681,33422.22$17,065
Aug 19968851,31820.26$17,930
Jul 19969031,32719.55$17,654
Jun 19968151,30518.73$15,265
May 19968361,18919.43$16,243
Apr 19968551,27721.51$18,391
Mar 19968711,53619.38$16,880
Feb 19967561,76216.98$12,837
Jan 19968062,11917.07$13,758
Dec 19957352,10217.19$12,635
Nov 19955201,94916.00$8,320
Oct 19955581,97415.43$8,610
Sep 19958131,44516.18$13,154
Aug 19956831,41515.92$10,873
Jul 19955331,44015.24$8,123
Jun 19955321,38316.41$8,730
May 19955621,37717.56$9,869
Apr 19956291,40717.73$11,152
Mar 19958011,68116.44$13,168
Feb 19958371,62016.58$13,877
Jan 19958111,04515.92$12,911
Dec 19949301,31215.03$13,978
Nov 19941,0071,36815.90$16,011
Oct 19949561,44315.58$14,894
Sep 199487489115.29$13,363
Aug 19949772,14516.13$15,759
Jul 19949912,68117.56$17,402
Jun 19948872,02017.09$15,159
May 19941,0262,60415.88$16,293
Apr 19941,0742,20214.14$15,186
Mar 19941,2281,94412.46$15,301
Feb 19941,1711,97112.50$14,638
Jan 19941,3972,23012.66$17,686
Dec 19931,2171,85312.33$15,006
Nov 19931,0301,61814.49$14,925
Oct 19931,1661,34315.85$18,481
Sep 19931,2401,27415.03$18,637
Aug 19931,2361,41315.66$19,356
Jul 19931,1041,76915.46$17,068
Jun 19931,0182,00516.79$17,092
May 19931,1182,12617.68$19,766
Apr 19931,2091,99618.05$21,822
Mar 19931,2492,03118.14$22,657
Feb 19931,1001,58817.90$19,690
Jan 19931,1001,34216.93$18,623

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.

May 2026 — as filed, then multipliedworked
Oil               20,706 bbl  × $106.41 = $2,203,325
Casinghead gas         0 Mcf  × $  3.05 =         $0

────────────────────────────────────────────────────
Month total                               $2,203,325

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. 08/O/26670 is the state's own key, not one this site invented.