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ERWIN

Operated by SATANTA OIL COMPANY (P-5 748744) in the WESTBROOK field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 22478District 08Field 96563001Hydrogen sulphide fieldOilCasinghead gasSaveExport
Value, all time
$689 k
Jan 1993 – May 2026
Value, last 12 filed months
$10 k
at the published price for each month
Months reported
401
no gaps in the span
Streams
2
oil, casinghead gas

The WESTBROOK field

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 103 leases and 2,419 wells, and the rule below applies to all of them.

Discovered
1921-12-31
as the register files it
Field class
Oil
the register's own label
Between wells
933 ft
minimum
From a lease line
330 ft
minimum

A drilling unit in this field needs at least 10 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: “OF ALL NECESSARY FORMS AND FEES STILL REQUIRED,EFFECTIVE 6/27/11”

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
OilDisposition19,953 bbl$689,136
Casinghead gasProduction116 Mcf$212
Total$689,348

48 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 (5)

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 32.4619, -101.0122. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.5 miles.

32.46137, -101.01221 · 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
40.0%
2 of 5 wells
With a plug date
40.0%
2 of 5 wells
Median depth
3,165 ft
4 wells filed one
Completion to plug
—
no well filed both dates

What the state filed about each well

On the RRC proration schedule
240.0%
A plug date is filed
240.0%
BothOn the schedule and plugged. Neither fact cancels the other.
240.0%
NeitherNo plug date, and not on the schedule.
360.0%

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

Between 3,136 and 3,196 ft, median 3,165 ft, over the 4 wells that filed a depth.

Completions filed
May 1973 – Feb 1974
2 of 5 wells; 3 filed none
Plug dates filed
Aug 1984 – Oct 1995
2 of 5 wells; 3 filed none

5 wells

42-3353014523,150 ft—Aug 1984Yes
42-3353015333,136 ft—Oct 1995Yes
42-3353012013,196 ft———
42-335008381D—Feb 1974——
42-335006202A3,179 ftMay 1973——

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 2025145066.483.13$9,640
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 2023129078.122.24$10,077
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 20221330104.226.84$13,861
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 2021147079.795.71$11,729
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 2020146044.642.68$6,517
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 2020152030.341.86$4,612
Feb 20200049.881.98$0
Jan 20200057.252.09$0
Dec 20190059.012.30$0
Nov 20190055.302.75$0
Oct 2019149053.472.42$7,967
Sep 20190055.052.66$0
Aug 20190053.112.30$0
Jul 20190056.272.46$0
Jun 20190052.782.49$0
May 2019154058.482.74$9,006
Apr 20190062.632.75$0
Mar 20190056.803.06$0
Feb 20190050.852.79$0
Jan 2019141046.033.23$6,490
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 2018137061.782.77$8,464
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 2017147042.493.09$6,246
May 20170045.373.26$0
Apr 20170047.933.21$0
Mar 20170046.772.98$0
Feb 2017153050.452.95$7,719
Jan 20170049.413.42$0
Dec 20160048.763.72$0
Nov 20160042.492.64$0
Oct 2016150046.193.09$6,929
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 20160026.472.06$0
Jan 2016146027.352.36$3,993
Dec 20150032.362.00$0
Nov 20150038.792.17$0
Oct 20150043.552.43$0
Sep 20150042.992.76$0
Aug 20150040.162.87$0
Jul 20150048.152.95$0
Jun 20150056.152.88$0
May 20150055.212.96$0
Apr 20150049.822.71$0
Mar 2015153042.892.93$6,562
Feb 20150044.662.98$0
Jan 20150043.433.10$0
Dec 20140054.693.59$0
Nov 20140070.464.25$0
Oct 20140078.303.90$0
Sep 20140086.164.05$0
Aug 20140089.394.04$0
Jul 20140096.564.18$0
Jun 2014152098.164.74$14,920
May 20140094.734.73$0
Apr 20140095.944.81$0
Mar 20140095.895.06$0
Feb 20140097.406.19$0
Jan 2014135090.404.86$12,204
Dec 20130091.824.35$0
Nov 20130088.853.74$0
Oct 2013165097.423.78$16,074
Sep 201300104.113.72$0
Aug 201300104.253.52$0
Jul 201300102.523.72$0
Jun 20130094.403.93$0
May 20130094.834.15$0
Apr 2013150093.964.28$14,094
Mar 20130093.623.91$0
Feb 20130091.233.42$0
Jan 20130091.603.42$0
Dec 20120086.773.42$0
Nov 20120086.953.62$0
Oct 2012146089.383.40$13,049
Sep 20120094.672.92$0
Aug 20120092.662.91$0
Jul 20120085.133.02$0
Jun 20120079.822.52$0
May 20120091.612.49$0
Apr 20121460101.652.00$14,841
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 2011142083.623.99$11,874
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 2010164070.364.91$11,539
May 20100071.124.24$0
Apr 20100081.694.12$0
Mar 20100078.394.39$0
Feb 20100073.585.44$0
Jan 2010144074.365.96$10,708
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 2009147066.163.90$9,726
May 20090054.743.93$0
Apr 20090046.773.59$0
Mar 20090042.144.06$0
Feb 2009149032.814.63$4,889
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 20081740131.3313.03$22,851
May 200800123.1711.57$0
Apr 200800110.3110.45$0
Mar 200800101.909.66$0
Feb 20080092.538.77$0
Jan 2008136090.388.21$12,292
Dec 20070088.337.30$0
Nov 200730091.677.29$2,750
Oct 20070082.856.92$0
Sep 2007144075.846.24$10,921
Aug 20070069.066.39$0
Jul 20070070.906.39$0
Jun 20070062.007.55$0
May 20070058.747.85$0
Apr 2007170059.617.81$10,134
Mar 20070056.927.30$0
Feb 2007167055.108.22$9,202
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 2006158068.717.34$10,856
Jul 20060069.376.34$0
Jun 20060066.286.38$0
May 20060066.016.42$0
Apr 2006162064.397.36$10,431
Mar 2006155056.707.08$8,789
Feb 20060057.597.75$0
Jan 2006172060.598.93$10,421
Dec 20050054.9413.42$0
Nov 20050054.6910.59$0
Oct 2005165058.3413.80$9,626
Sep 2005158061.4512.08$9,709
Aug 20050061.519.80$0
Jul 20050055.697.84$0
Jun 2005163052.337.38$8,530
May 2005163045.226.65$7,371
Apr 20050049.207.36$0
Mar 2005170050.377.15$8,563
Feb 2005160045.226.31$7,235
Jan 20050043.166.32$0
Dec 2004173039.866.75$6,896
Nov 20040045.286.33$0
Oct 20040049.706.52$0
Sep 20040043.245.28$0
Aug 2004163042.375.55$6,906
Jul 20040038.286.08$0
Jun 20040036.106.43$0
May 20040037.486.49$0
Apr 2004169034.475.86$5,825
Mar 20040034.365.53$0
Feb 2004171032.455.51$5,549
Jan 20040032.036.30$0
Dec 2003171030.266.30$5,174
Nov 20030028.804.60$0
Oct 2003170028.174.76$4,789
Sep 20030026.314.75$0
Aug 2003121029.765.13$3,601
Jul 2003160029.415.17$4,706
Jun 2003169028.565.98$4,827
May 20030026.595.97$0
Apr 200376026.675.41$2,027
Mar 20030031.146.10$0
Feb 2003160033.487.93$5,357
Jan 20030030.315.58$0
Dec 200297026.914.85$2,610
Nov 20020024.664.14$0
Oct 20020026.464.23$0
Sep 200256127.443.64$1,540
Aug 2002161125.963.16$4,183
Jul 20020124.583.06$3
Jun 20020123.733.34$3
May 2002163124.663.58$4,023
Apr 20020123.653.51$4
Mar 2002177122.003.10$3,897
Feb 20020118.222.38$2
Jan 20020117.172.38$2
Dec 2001172116.932.36$2,914
Nov 20010118.072.41$2
Oct 20010019.782.53$0
Sep 20010124.262.25$2
Aug 20010124.873.05$3
Jul 20010123.933.20$3
Jun 2001160124.563.82$3,933
May 20010125.524.31$4
Apr 20010124.685.34$5
Mar 20010124.545.38$5
Feb 2001167127.755.77$4,640
Jan 20010127.478.40$8
Dec 2000166126.889.12$4,471
Nov 20000132.215.66$6
Oct 20000131.235.15$5
Sep 2000171131.875.19$5,455
Aug 20000129.644.54$5
Jul 2000144128.534.09$4,112
Jun 20000129.304.40$4
May 2000168127.263.68$4,583
Apr 20000124.513.12$3
Mar 2000165128.422.86$4,692
Feb 2000176127.622.73$4,864
Jan 20000125.272.48$2
Dec 1999175124.282.42$4,251
Nov 19990123.192.43$2
Oct 1999168120.982.80$3,527
Sep 1999169121.752.62$3,678
Aug 19990119.262.88$3
Jul 1999164117.892.37$2,936
Jun 19990115.942.36$2
May 1999169115.792.32$2,671
Apr 1999168115.102.21$2,539
Mar 19990112.471.84$2
Feb 199916419.981.82$1,639
Jan 1999168110.381.90$1,746
Dec 1998019.201.77$2
Nov 1998170110.892.19$1,853
Oct 19980112.421.97$2
Sep 1998159112.592.08$2,004
Aug 1998169111.301.91$1,912
Jul 19980111.742.24$2
Jun 1998164111.242.24$1,846
May 19980112.622.21$2
Apr 1998164113.042.51$2,141
Mar 1998179112.802.31$2,294
Feb 19980113.952.30$2
Jan 19980114.702.15$2
Dec 19970116.322.41$2
Nov 1997161118.193.09$2,932
Oct 1997169119.253.15$3,256
Sep 19970117.742.95$3
Aug 1997162117.862.55$2,896
Jul 1997177117.582.25$3,114
Jun 19970117.242.26$2
May 1997161118.972.31$3,056
Apr 1997162117.882.08$2,899
Mar 19970118.951.94$2
Feb 1997165120.492.21$3,383
Jan 19970123.483.54$4
Dec 1996236123.32—$5,504
Nov 19960121.97—$0
Oct 1996159123.31—$3,706
Sep 1996156122.22—$3,466
Aug 19960120.26—$0
Jul 1996154119.55—$3,011
Jun 1996155118.73—$2,903
May 1996159119.43—$3,089
Apr 1996162121.51—$3,485
Mar 1996160119.38—$3,101
Feb 1996150116.98—$2,547
Jan 19960117.07—$0
Dec 1995164117.19—$2,819
Nov 1995149116.00—$2,384
Oct 1995164115.43—$2,531
Sep 19950116.18—$0
Aug 1995151115.92—$2,404
Jul 1995151115.24—$2,301
Jun 1995152116.41—$2,494
May 1995157117.56—$2,757
Apr 1995155117.73—$2,748
Mar 199578116.44—$1,282
Feb 1995156116.58—$2,586
Jan 1995158115.92—$2,515
Dec 19940115.03—$0
Nov 1994156115.90—$2,480
Oct 1994156115.58—$2,430
Sep 1994159115.29—$2,431
Aug 1994155116.13—$2,500
Jul 1994159117.56—$2,792
Jun 1994159117.09—$2,717
May 19940115.88—$0
Apr 1994137114.14—$1,937
Mar 1994144112.46—$1,794
Feb 1994433112.50—$5,413
Jan 19940112.66—$0
Dec 19930112.33—$0
Nov 1993166114.49—$2,405
Oct 1993152115.85—$2,409
Sep 1993153115.03—$2,300
Aug 1993153115.66—$2,396
Jul 1993153115.46—$2,365
Jun 1993154116.79—$2,586
May 19930117.68—$0
Apr 1993156118.05—$2,816
Mar 1993157118.14—$2,848
Feb 1993303117.90—$5,424
Jan 19930116.93—$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.

Jun 2025 — as filed, then multipliedworked
Oil                  145 bbl  × $ 66.48 =     $9,640
Casinghead gas         0 Mcf  × $  3.13 =         $0

────────────────────────────────────────────────────
Month total                                   $9,640

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/22478 is the state's own key, not one this site invented.