OBRIEN, ERIN, ETAL, UNIT 1

Operated by BIG LAKE CORPORATION (P-5 69458) in the HIGH ISLAND field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 6121District 03Field 41139001Hydrogen sulphide fieldOilCasinghead gasSaveExport
Value, all time
$14.3 M
Jan 1993 – May 2026
Value, last 12 filed months
$4 k
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 106 leases and 655 wells, and the rule below applies to all of them.

Discovered
1922-12-31
as the register files it
Field class
Oil and gas
the register's own label
Between wells
0 ft
minimum
From a lease line
0 ft
minimum

A drilling unit in this field needs at least 0 acres.

The register flags this field for hydrogen sulphide. That is a poisonous gas that occurs naturally in some formations. The flag is a property of the field as the Commission records it. It is not a measurement taken at this lease, and it is not a statement that gas is escaping anywhere.

The Commission's schedule remark for this field reads: THIS IS A PIERCEMENT TYPE SALT DOME.

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
OilDisposition166,668 bbl$13,941,137
Casinghead gasProduction68,940 Mcf$316,539
Total$14,257,676

1,757 Mcf of this lease's gas, across 41 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 (3)

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 29.5511, -94.4239. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.1 miles.

29.55104, -94.42407 · 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%
2 of 3 wells
With a plug date
66.7%
2 of 3 wells
Median depth
8,257 ft
3 wells filed one
Completion to plug
13.8 years
median over 2 wells

What the state filed about each well

On the RRC proration schedule
266.7%
A plug date is filed
266.7%
BothOn the schedule and plugged. Neither fact cancels the other.
266.7%
NeitherNo plug date, and not on the schedule.
133.3%

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

Between 8,113 and 8,399 ft, median 8,257 ft, over the 3 wells that filed a depth.

Completions filed
May 1967 – Dec 2025
3 of 3 wells
Plug dates filed
Sep 1983 – Apr 2025
2 of 3 wells; 1 filed none

Last completion to plug: a median of 13.8 years across the 2 wells that filed both dates, with the middle half between 12.6 years and 15.1 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

3 wells

42-1673144438,113 ftDec 2025
42-1670197528,399 ftDec 2013Apr 2025Yes
42-1670033518,257 ftMay 1967Sep 1983Yes

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 202670059.138.00$4,139
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 20230076.533.39$0
Dec 20220076.415.73$0
Nov 20220085.005.65$0
Oct 20220087.185.86$0
Sep 20220084.888.16$0
Aug 20220094.529.13$0
Jul 202200101.587.54$0
Jun 202200115.097.98$0
May 202200109.378.43$0
Apr 202200104.226.84$0
Mar 202200108.885.08$0
Feb 20220091.054.86$0
Jan 20220081.844.54$0
Dec 20210071.323.90$0
Nov 20210077.435.24$0
Oct 20210079.795.71$0
Sep 20210069.865.35$0
Aug 20210066.024.22$0
Jul 20210070.783.98$0
Jun 20210069.493.38$0
May 20210063.483.02$0
Apr 20210060.362.76$0
Mar 20210061.302.72$0
Feb 20210057.805.55$0
Jan 20210050.412.81$0
Dec 20200044.642.68$0
Nov 20200038.772.71$0
Oct 20200036.972.48$0
Sep 20200037.091.99$0
Aug 20200039.982.39$0
Jul 20200038.371.83$0
Jun 20200034.901.69$0
May 20200016.921.81$0
Apr 20200014.751.80$0
Mar 20200030.341.86$0
Feb 20200049.881.98$0
Jan 20200057.252.09$0
Dec 20190059.012.30$0
Nov 20190055.302.75$0
Oct 20190053.472.42$0
Sep 20190055.052.66$0
Aug 20190053.112.30$0
Jul 20190056.272.46$0
Jun 20190052.782.49$0
May 20190058.482.74$0
Apr 20190062.632.75$0
Mar 20190056.803.06$0
Feb 20190050.852.79$0
Jan 20190046.033.23$0
Dec 20180046.594.19$0
Nov 20180052.934.24$0
Oct 20180061.443.40$0
Sep 20180059.543.11$0
Aug 20180059.403.07$0
Jul 20180065.142.93$0
Jun 20180060.183.08$0
May 20180065.382.90$0
Apr 20180063.842.90$0
Mar 20180061.222.79$0
Feb 20180061.782.77$0
Jan 20180062.874.01$0
Dec 20170057.272.92$0
Nov 20170055.423.12$0
Oct 20170049.292.98$0
Sep 20170047.523.09$0
Aug 20170045.373.00$0
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 201627526548.763.72$14,396
Nov 201624547042.492.64$11,653
Oct 201624445446.193.09$12,673
Sep 201626644141.553.10$12,420
Aug 201626547741.442.92$12,377
Jul 201627548941.622.92$12,876
Jun 201626644945.352.69$13,269
May 201629246542.521.99$13,342
Apr 201619048536.561.99$7,912
Mar 201626545433.011.79$9,562
Feb 201621145026.472.06$6,514
Jan 201625648227.352.36$8,141
Dec 201527249732.362.00$9,797
Nov 201527248638.792.17$11,604
Oct 201523150343.552.43$11,281
Sep 201525145042.992.76$12,032
Aug 201526852440.162.87$12,268
Jul 201528853248.152.95$15,434
Jun 201521954056.152.88$13,854
May 201525150055.212.96$15,335
Apr 201525151649.822.71$13,901
Mar 201522549742.892.93$11,109
Feb 201522647844.662.98$11,516
Jan 201527455743.433.10$13,627
Dec 201427561254.693.59$17,238
Nov 20141,23250270.464.25$88,941
Oct 20141,56443578.303.90$124,158
Sep 20141,24146586.164.05$108,806
Aug 20141,50558089.394.04$136,872
Jul 20141,69443196.564.18$165,374
Jun 20141,64634998.164.74$163,225
May 20141,55940894.734.73$149,613
Apr 201489842995.944.81$88,217
Mar 20141,60748295.895.06$156,533
Feb 20141,54245997.406.19$153,033
Jan 201424357890.404.86$24,777
Dec 201324352691.824.35$24,603
Nov 20132,33961288.853.74$210,108
Oct 20131,58953997.423.78$156,837
Sep 20131,537510104.113.72$161,913
Aug 20131,165570104.253.52$123,459
Jul 20131,069523102.523.72$111,538
Jun 20131,12056894.403.93$107,962
May 20131,18155394.834.15$114,289
Apr 20131,31854593.964.28$126,173
Mar 20131,15252093.623.91$109,885
Feb 20131,02841091.233.42$95,187
Jan 20131,02882491.603.42$96,983
Dec 20121,09187886.773.42$97,669
Nov 20121,12480386.953.62$100,643
Oct 201289783289.383.40$83,002
Sep 20121,16693094.672.92$113,099
Aug 20121,18898992.662.91$112,956
Jul 20121,27598085.133.02$111,501
Jun 20121,9051,07779.822.52$154,770
May 20121,80874591.612.49$167,485
Apr 20121,744630101.652.00$178,536
Mar 20121,747704105.052.22$185,087
Feb 20121,950898101.102.57$199,453
Jan 20121,92895098.092.73$191,715
Dec 20111,7631,00796.873.24$174,044
Nov 20112,12679095.723.31$206,117
Oct 20112,18336584.983.65$186,843
Sep 20111,94135383.623.99$163,713
Aug 20114,39334883.404.15$367,820
Jul 20112,74034494.144.52$259,498
Jun 20112,72333092.904.64$254,498
May 20114,11438198.134.40$405,385
Apr 20112,801398105.964.33$298,519
Mar 20112,65742696.364.06$257,757
Feb 20112,87938285.644.18$248,154
Jan 20113,27238686.504.59$284,799
Dec 20103,18643685.734.35$275,031
Nov 20103,29443080.843.80$267,919
Oct 20103,89652978.103.51$306,134
Sep 20104,04445872.633.98$295,538
Aug 20104,88356473.684.42$362,272
Jul 20104,11440072.554.74$300,365
Jun 20104,56325170.364.91$322,285
May 20105,02827571.124.24$358,756
Apr 201034526581.694.12$29,276
Mar 201034527578.394.39$28,251
Feb 201036626373.585.44$28,362
Jan 201048727674.365.96$37,859
Dec 200951223971.445.48$37,888
Nov 200950320774.593.75$38,295
Oct 200961321372.544.11$45,343
Sep 20099025565.543.06$6,680
Aug 200942241867.423.22$29,797
Jul 200948441461.133.46$31,021
Jun 200947652066.163.90$33,518
May 200967559554.743.93$39,285
Apr 200968753946.773.59$34,065
Mar 20091,04656642.144.06$46,376
Feb 20091,4501,12032.814.63$52,763
Jan 20091,52588435.865.37$59,434
Dec 20081,9511,18237.105.98$79,447
Nov 20081,19463755.496.86$70,625
Oct 20080075.246.92$0
Sep 20081,118487101.767.88$117,604
Aug 20084,0991,762114.228.48$483,135
Jul 20083,0771,446131.0811.39$419,802
Jun 2008679637131.3313.03$97,475
May 2008768700123.1711.57$102,697
Apr 20081,068555110.3110.45$123,614
Mar 20081,336854101.909.66$144,392
Feb 20081,37571192.538.77$133,465
Jan 20081,53970690.388.21$144,888
Dec 20071,18883088.337.30$110,997
Nov 20071,35261491.677.29$128,415
Oct 20072,11791182.856.92$181,699
Sep 20072,90192675.846.24$225,794
Aug 20073,9001,13569.066.39$276,584
Jul 20073,8691,69470.906.39$285,133
Jun 200745425162.007.55$30,043
May 200787847658.747.85$55,309
Apr 200798946059.617.81$62,545
Mar 20070056.927.30$0
Feb 20070055.108.22$0
Jan 20070050.306.73$0
Dec 20060056.656.92$0
Nov 20060054.207.62$0
Oct 20060054.906.01$0
Sep 20060060.085.04$0
Aug 20060068.717.34$0
Jul 20060069.376.34$0
Jun 20060066.286.38$0
May 20060066.016.42$0
Apr 20060064.397.36$0
Mar 20060056.707.08$0
Feb 20060057.597.75$0
Jan 20060060.598.93$0
Dec 20050054.9413.42$0
Nov 20050054.6910.59$0
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 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 19990015.102.21$0
Mar 19990012.471.84$0
Feb 1999009.981.82$0
Jan 19990010.381.90$0
Dec 1998009.201.77$0
Nov 19980010.892.19$0
Oct 19980012.421.97$0
Sep 19980012.592.08$0
Aug 19980011.301.91$0
Jul 19980011.742.24$0
Jun 19980011.242.24$0
May 19980012.622.21$0
Apr 19980013.042.51$0
Mar 19980012.802.31$0
Feb 19980013.952.30$0
Jan 19980014.702.15$0
Dec 19970016.322.41$0
Nov 19970018.193.09$0
Oct 19970019.253.15$0
Sep 19970017.742.95$0
Aug 19970017.862.55$0
Jul 19970017.582.25$0
Jun 19970017.242.26$0
May 19970018.972.31$0
Apr 19970017.882.08$0
Mar 19970018.951.94$0
Feb 19970020.492.21$0
Jan 19970023.483.54$0
Dec 19960023.32$0
Nov 19960021.97$0
Oct 19960023.31$0
Sep 19960022.22$0
Aug 19960020.26$0
Jul 1996127019.55$2,483
Jun 19960018.73$0
May 19960119.43$0
Apr 19960121.51$0
Mar 19960119.38$0
Feb 19960116.98$0
Jan 19960117.07$0
Dec 199563117.19$1,083
Nov 19950116.00$0
Oct 19950115.43$0
Sep 19950116.18$0
Aug 19950115.92$0
Jul 19950115.24$0
Jun 19950116.41$0
May 19950117.56$0
Apr 199558117.73$1,028
Mar 19950116.44$0
Feb 19950116.58$0
Jan 19950115.92$0
Dec 19949115.03$135
Nov 19940115.90$0
Oct 19940115.58$0
Sep 199423115.29$352
Aug 19940116.13$0
Jul 19940117.56$0
Jun 19940117.09$0
May 19940115.88$0
Apr 19940114.14$0
Mar 199410112.46$125
Feb 19940112.50$0
Jan 19940112.66$0
Dec 199316112.33$197
Nov 199349114.49$710
Oct 1993025515.85$0
Sep 1993023415.03$0
Aug 1993014515.66$0
Jul 1993011915.46$0
Jun 1993014416.79$0
May 19938915117.68$1,574
Apr 1993014918.05$0
Mar 1993013518.14$0
Feb 199305117.90$0
Jan 1993034316.93$0

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 2026 — as filed, then multipliedworked
Oil                   70 bbl  × $ 59.13 =     $4,139
Casinghead gas         0 Mcf  × $  8.00 =         $0

────────────────────────────────────────────────────
Month total                                   $4,139

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. 03/O/6121 is the state's own key, not one this site invented.