TOM O'CONNOR (4150 FT. SD.) UNIT

Operated by HILCORP ENERGY COMPANY (P-5 386310) in the TOM O'CONNOR (4150) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 8874District 02Field 90534312OilCasinghead gasSaveExport
Value, all time
$38.6 M
Jun 2004 – May 2026
Value, last 12 filed months
$6 k
at the published price for each month
Months reported
264
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 16 leases and 121 wells, and the rule below applies to all of them.

Discovered
1977-06-24
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
OilDisposition512,094 bbl$35,975,876
Casinghead gasProduction460,854 Mcf$2,592,626
Total$38,568,502

Wells on this lease (62)

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 28.3791, -97.1477. A lease has no coordinate of its own — that point is the mean of its wells, and they span 4.3 miles.

28.37931, -97.13967 · 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
16.1%
10 of 62 wells
With a plug date
11.3%
7 of 62 wells
Median depth
5,924 ft
62 wells filed one
Completion to plug
14.8 years
median over 6 wells

What the state filed about each well

On the RRC proration schedule
1016.1%
A plug date is filed
711.3%
BothOn the schedule and plugged. Neither fact cancels the other.
711.3%
NeitherNo plug date, and not on the schedule.
5283.9%

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, 62 of 62 wells. Median 5,924 ft, with the middle half between 4,515 and 5,957 ft; the shallowest is 4,452 ft and the deepest 8,230 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, 61 of 62 wells, Apr 1984 – May 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
Apr 1984 – May 2024
61 of 62 wells; 1 filed none
Plug dates filed
Sep 2012 – May 2025
7 of 62 wells; 55 filed none

Last completion to plug: a median of 14.8 years across the 6 wells that filed both dates, with the middle half between 8.1 years and 15.5 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

62 wells

42-39100744W 9AB5,905 ftSep 2012Yes
42-3910146235WA5,901 ftMay 2024
42-39101500W007A5,947 ftApr 2024
42-39101483007WA4,477 ftAug 2020Yes
42-39100547W412A5,925 ftMay 2019
42-39101486G 4WA5,425 ftOct 2018
42-39101171W227A5,925 ftAug 2018
42-39101531W002GA5,915 ftAug 2018
42-39100766W705A5,949 ftJul 2018Jun 2024Yes
42-39132533W536A6,200 ftNov 2017
42-39100847W510A5,925 ftOct 2017Nov 2017Yes
42-39100565W335A5,925 ftSep 2017
42-39101573W250A5,895 ftJan 2017
42-39100843W506A5,925 ftOct 2015
42-39130222W716A6,750 ftOct 2015
42-39132017W294A6,000 ftSep 2015
42-39100679W310A5,927 ftJul 2015
42-39101550W051A5,910 ftJun 2015Yes
42-39130049W712A4,500 ftJun 2015Yes
42-39131840W530A6,100 ftApr 2015
42-39132630W721A4,669 ftMar 2015
42-39101459W032A5,960 ftJan 2014
42-391317433105WA6,000 ftSep 2013
42-39100747W103A5,961 ftApr 2013
42-39100568W346A5,923 ftJul 2012
42-39101179W265A4,515 ftMay 2012
42-39130158W114A7,700 ftJan 2012
42-39101161W203A5,920 ftJul 2011
42-39103804W261A4,515 ftMar 2011
42-39131717W528A4,580 ftFeb 2011
42-39130194W611A6,750 ftNov 2010
42-39103998W263A5,945 ftNov 2010
42-39100555W401G5,925 ftOct 2010
42-39100649W403A6,169 ftOct 2010
42-39100663W402G4,464 ftSep 2010May 2025Yes
42-39100840W503A5,980 ftMay 2010
42-39130053W394A4,500 ftMay 2010
42-39100552W414A5,925 ftMay 2010
42-39100758W609A6,000 ftJun 2008
42-39103794W377A4,515 ftMar 2008
42-39100515W909A5,925 ftFeb 2008
42-39100567W345A5,925 ftSep 2007
42-39130118W111A8,230 ftNov 2005Aug 2020Yes
42-39100475W817A5,937 ftJun 2005
42-39100524W924A6,000 ftFeb 2005
42-39100658431WA6,390 ftJan 2005
42-39100438W830A5,962 ftSep 2004
42-39130050271WA4,500 ftMay 2003Feb 2019Yes
42-39100425816WA5,925 ftDec 2002
42-39101177262WA4,515 ftNov 2002
42-39100721W375A4,515 ftDec 1997
42-39130055269WA4,500 ftDec 1995
42-39103790W380A4,509 ftOct 1993
42-39103787W376A4,515 ftApr 1991
42-39130051270WA4,500 ftOct 1985
42-39130071275WA4,500 ftAug 1985Apr 2015Yes
42-39130065274WA4,500 ftAug 1985
42-39100720W374A4,452 ftAug 1985
42-39130058W391A4,500 ftApr 1985
42-39103788W378A4,515 ftAug 1984
42-39130064273WA4,500 ftMay 1984
42-39101157267WA4,515 ftApr 1984

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 (264)

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

264 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 20253063.933.01$192
Jul 202529666.743.32$1,955
Jun 2025497766.483.13$3,498
May 202522360.553.23$1,342
Apr 202516362.363.54$1,008
Mar 202532667.704.27$2,192
Feb 202553370.884.34$3,770
Jan 20252547774.324.28$19,207
Dec 202457614468.993.12$40,188
Nov 20246352769.052.20$43,906
Oct 20245031071.372.28$35,922
Sep 2024566069.612.36$39,399
Aug 20245911275.632.06$44,722
Jul 2024570479.932.15$45,569
Jun 20245201878.082.63$40,649
May 20246906278.812.20$54,515
Apr 20246756684.451.66$57,113
Mar 202493712980.301.55$75,440
Feb 202465310676.091.78$49,876
Jan 2024527073.023.30$38,482
Dec 202356477471.262.61$42,211
Nov 202374915,96277.892.81$103,154
Oct 20235808,04685.443.09$74,395
Sep 20236915,92689.042.74$77,734
Aug 202362110680.522.67$50,286
Jul 2023692574.852.64$51,809
Jun 2023785068.962.26$54,134
May 2023773070.622.23$54,589
Apr 2023840078.122.24$65,621
Mar 2023737072.852.39$53,690
Feb 2023728075.112.47$54,680
Jan 2023812076.533.39$62,142
Dec 2022648076.415.73$49,514
Nov 2022605085.005.65$51,425
Oct 202261714887.185.86$54,658
Sep 2022516084.888.16$43,798
Aug 2022534094.529.13$50,474
Jul 20228190101.587.54$83,194
Jun 20227470115.097.98$85,972
May 202263417109.378.43$69,484
Apr 20227170104.226.84$74,726
Mar 20226890108.885.08$75,018
Feb 2022550091.054.86$50,078
Jan 202267612481.844.54$55,887
Dec 202165960271.323.90$49,347
Nov 202172615177.435.24$57,005
Oct 2021750279.795.71$59,854
Sep 202175033869.865.35$54,204
Aug 20218863,11166.024.22$71,624
Jul 2021875870.783.98$61,964
Jun 202164958969.493.38$47,090
May 202178873163.483.02$52,228
Apr 202177356860.362.76$48,225
Mar 20217834561.302.72$48,120
Feb 2021468057.805.55$27,050
Jan 202175933450.412.81$39,200
Dec 202076151144.642.68$35,338
Nov 202091680138.772.71$37,681
Oct 202099931236.972.48$37,706
Sep 20201,06975437.091.99$41,150
Aug 20209421,00239.982.39$40,051
Jul 20201,01936738.371.83$39,769
Jun 20201,3652734.901.69$47,684
May 202066373816.921.81$12,557
Apr 20201,02152314.751.80$16,003
Mar 20201,129030.341.86$34,254
Feb 202075089449.881.98$39,181
Jan 202091096157.252.09$54,111
Dec 20191,0571,04659.012.30$64,784
Nov 20191,04240255.302.75$58,728
Oct 20191,21117253.472.42$65,168
Sep 20191,41276055.052.66$79,750
Aug 20191,5601,39453.112.30$86,064
Jul 20191,5872,48156.272.46$95,404
Jun 20191,3571,55252.782.49$75,489
May 20191,2921,89058.482.74$80,735
Apr 20191,15895162.632.75$75,141
Mar 201993773756.803.06$55,478
Feb 201982556050.852.79$43,515
Jan 201990866246.033.23$43,932
Dec 201883879546.594.19$42,370
Nov 20181,22173152.934.24$67,725
Oct 20181,52777061.443.40$96,435
Sep 20181,5301,28559.543.11$95,090
Aug 20181,56471959.403.07$95,106
Jul 20181,684065.142.93$109,696
Jun 20181,7871,35960.183.08$111,723
May 20182,0611,23465.382.90$138,328
Apr 20181,80481463.842.90$117,529
Mar 20181,8241,63961.222.79$116,233
Feb 20182,10188061.782.77$132,234
Jan 20182,25949262.874.01$143,996
Dec 20172,2766257.272.92$130,528
Nov 20172,29085255.423.12$129,569
Oct 20172,1371349.292.98$105,372
Sep 2017987047.523.09$46,902
Aug 20171,24736345.373.00$57,667
Jul 20171,73412143.873.09$76,444
Jun 20171,73212742.493.09$73,985
May 20171,62522045.373.26$74,444
Apr 20171,428047.933.21$68,444
Mar 20171,570046.772.98$73,429
Feb 20171,63915750.452.95$83,151
Jan 20171,86432249.413.42$93,201
Dec 20161,73728648.763.72$85,761
Nov 20161,79341342.492.64$77,277
Oct 20161,83671346.193.09$87,008
Sep 20161,8921,07941.553.10$81,958
Aug 20161,81590041.442.92$77,846
Jul 20161,9121,23641.622.92$83,192
Jun 20161,86787445.352.69$87,016
May 20162,1491,24942.521.99$93,862
Apr 20163,3041,10736.561.99$122,998
Mar 20162,3151,11633.011.79$78,420
Feb 20162,46050626.472.06$66,160
Jan 20162,6321,27327.352.36$74,995
Dec 20152,7511,15832.362.00$91,340
Nov 20152,8532,42838.792.17$115,930
Oct 20152,9152,28543.552.43$132,493
Sep 20152,3732,99842.992.76$110,285
Aug 20152,5143,55440.162.87$111,171
Jul 20152,2793,92548.152.95$121,293
Jun 20152,0272,51456.152.88$121,064
May 20152,8292,39355.212.96$163,261
Apr 20152,9521,44449.822.71$150,977
Mar 20152,8691,71842.892.93$128,093
Feb 20153,3472,89744.662.98$158,099
Jan 20153,7422,91743.433.10$171,560
Dec 20144,0432,77754.693.59$231,085
Nov 20143,4023,93470.464.25$256,432
Oct 20143,8452,80778.303.90$312,013
Sep 20144,3642,20886.164.05$384,935
Aug 20144,5521,93989.394.04$414,727
Jul 20144,4732,89096.564.18$443,992
Jun 20144,0781,56898.164.74$407,724
May 20144,3251,41494.734.73$416,391
Apr 20144,4251,51995.944.81$431,840
Mar 20144,38797395.895.06$425,590
Feb 20143,77087197.406.19$372,591
Jan 20144,7032,45990.404.86$437,104
Dec 20134,07195091.824.35$377,936
Nov 20133,38781888.853.74$303,993
Oct 20133,80838397.423.78$372,423
Sep 20132,998183104.113.72$312,802
Aug 20132,618411104.253.52$274,374
Jul 20132,9991,078102.523.72$311,465
Jun 20132,99364794.403.93$285,084
May 20133,1341,15494.834.15$301,985
Apr 20133,3821,07193.964.28$322,359
Mar 20133,12169693.623.91$294,911
Feb 20132,16662691.233.42$199,745
Jan 20132,54692991.603.42$236,391
Dec 20122,3741,22586.773.42$210,182
Nov 20122,1131,38386.953.62$188,739
Oct 20122,1981,81589.383.40$202,628
Sep 20122,2541,72194.672.92$218,409
Aug 20122,3171,69292.662.91$219,614
Jul 20122,5301,72285.133.02$220,581
Jun 20122,8861,77079.822.52$234,819
May 20122,9071,89891.612.49$271,033
Apr 20123,0391,408101.652.00$311,726
Mar 20123,142966105.052.22$332,214
Feb 20123,0361,061101.102.57$309,667
Jan 20122,88150298.092.73$283,970
Dec 20113,28522596.873.24$318,947
Nov 20112,84827395.723.31$273,515
Oct 20113,64155284.983.65$311,426
Sep 20113,11580983.623.99$263,701
Aug 20112,53766183.404.15$214,329
Jul 20112,46374394.144.52$235,223
Jun 20113,47896992.904.64$327,602
May 20113,5111,29298.134.40$350,225
Apr 20112,471826105.964.33$265,406
Mar 20111,97656496.364.06$192,696
Feb 20111,96349985.644.18$170,197
Jan 20113,33062786.504.59$290,922
Dec 20102,91457285.734.35$252,304
Nov 20102,84160880.843.80$231,974
Oct 20102,91776278.103.51$230,491
Sep 20102,86674472.633.98$211,118
Aug 20103,1841,25973.684.42$240,161
Jul 20103,2301,37372.554.74$240,840
Jun 20102,8941,11670.364.91$209,102
May 20103,02691771.124.24$219,093
Apr 20101,27733681.694.12$105,703
Mar 20101,42467678.394.39$114,594
Feb 20101,4511,33973.585.44$114,052
Jan 20101,84294874.365.96$142,625
Dec 20091,7051,36871.445.48$129,307
Nov 20091,5171,27874.593.75$117,947
Oct 20091,4941,26872.544.11$113,587
Sep 20091,4191,23265.543.06$96,777
Aug 20091,8631,36467.423.22$129,993
Jul 20091,5101,57761.133.46$97,770
Jun 20091,9281,76866.163.90$134,443
May 20092,5522,07854.743.93$147,854
Apr 20092,3282,19346.773.59$116,748
Mar 20092,0672,01942.144.06$95,299
Feb 20092,3322,23032.814.63$86,845
Jan 20092,7572,77635.865.37$113,776
Dec 20082,8131,88537.105.98$115,629
Nov 20082,8681,94755.496.86$172,502
Oct 20083,2922,80475.246.92$267,099
Sep 20082,6512,722101.767.88$291,207
Aug 20082,8923,883114.228.48$363,264
Jul 20082,9582,742131.0811.39$418,964
Jun 20083,1172,457131.3313.03$441,377
May 20083,0872,394123.1711.57$407,935
Apr 20082,9002,200110.3110.45$342,900
Mar 20083,4032,421101.909.66$370,162
Feb 20082,6462,69292.538.77$268,445
Jan 20082,8503,01590.388.21$282,323
Dec 20072,7495,43288.337.30$282,483
Nov 20072,6783,36691.677.29$270,036
Oct 20072,6742,88782.856.92$241,525
Sep 20072,7825,47575.846.24$245,174
Aug 20072,3892,72669.066.39$182,398
Jul 20072,6814,04370.906.39$215,909
Jun 20072,1653,39762.007.55$159,872
May 20072,3667,33158.747.85$196,500
Apr 20072,3815,99359.617.81$188,708
Mar 20072,5427,95856.927.30$202,800
Feb 20072,2486,44055.108.22$176,776
Jan 20072,2816,42550.306.73$157,954
Dec 20062,1207,69156.656.92$173,308
Nov 20062,0495,15654.207.62$150,332
Oct 20062,0474,50154.906.01$139,448
Sep 20062,0505,34660.085.04$150,093
Aug 20062,2785,71668.717.34$198,476
Jul 20062,2379,98769.376.34$218,526
Jun 20062,1255,58766.286.38$176,512
May 20062,4336,61466.016.42$203,097
Apr 20062,6116,28864.397.36$214,405
Mar 20062,8743,73356.707.08$189,396
Feb 20061,9702,34557.597.75$131,629
Jan 20062,3605,83760.598.93$195,136
Dec 20052,3562,30354.9413.42$160,334
Nov 20052,3793,27054.6910.59$164,732
Oct 20052,6422,13258.3413.80$183,547
Sep 20052,4975,03361.4512.08$214,234
Aug 20052,6302,07761.519.80$182,119
Jul 20052,9053,03555.697.84$185,585
Jun 20052,8485,11352.337.38$186,775
May 20052,9616,96145.226.65$180,195
Apr 20052,7868,08749.207.36$196,595
Mar 20053,0617,16350.377.15$205,433
Feb 20052,8145,01645.226.31$158,910
Jan 20052,7373,78643.166.32$142,065
Dec 20042,8306,53839.866.75$156,942
Nov 20042,7382,97045.286.33$142,778
Oct 20043,0453,49049.706.52$174,074
Sep 20042,9105,86043.245.28$156,792
Aug 20042,9397,00742.375.55$163,419
Jul 20043,0989,90738.286.08$178,867
Jun 20043,2556,58636.106.43$159,873

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.

Aug 2025 — as filed, then multipliedworked
Oil                    3 bbl  × $ 63.93 =       $192
Casinghead gas         0 Mcf  × $  3.01 =         $0

────────────────────────────────────────────────────
Month total                                     $192

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/8874 is the state's own key, not one this site invented.