SIMPSON-MANN "B"

Operated by CORE PETRO, LLC (P-5 178386) in the ATKINSON, W. (SAN ANGELO) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 12350District 7CField 04279500OilCasinghead gasSaveExport
Value, all time
$842 k
Jan 1993 – May 2026
Value, last 12 filed months
$48 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 25 leases and 216 wells, and the rule below applies to all of them.

Discovered
1965-03-19
as the register files it
Field class
Oil
the register's own label
Between wells
660 ft
minimum
From a lease line
330 ft
minimum

A drilling unit in this field needs at least 10 acres.

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
OilDisposition17,287 bbl$841,539
Casinghead gasProduction38 Mcf$0
Total$841,539

38 Mcf of this lease's gas, across 38 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 (6)

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 31.2225, -100.6879. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.5 miles.

31.22290, -100.68822 · 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%
4 of 6 wells
With a plug date
66.7%
4 of 6 wells
Median depth
971 ft
6 wells filed one
Completion to plug
26.4 years
median over 4 wells

What the state filed about each well

On the RRC proration schedule
466.7%
A plug date is filed
466.7%
BothOn the schedule and plugged. Neither fact cancels the other.
466.7%
NeitherNo plug date, and not on the schedule.
233.3%

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 938 and 1,051 ft, median 971 ft, over the 6 wells that filed a depth.

Completions filed
Dec 1987 – Nov 1988
6 of 6 wells
Plug dates filed
Sep 2005 – Oct 2018
4 of 6 wells; 2 filed none

Last completion to plug: a median of 26.4 years across the 4 wells that filed both dates, with the middle half between 23.8 years and 27.8 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

6 wells

42-451317751991 ftNov 1988Oct 2014Yes
42-451318545946 ftAug 1988Sep 2005Yes
42-451318599950 ftApr 1988Oct 2018Yes
42-451318414938 ftMar 1988
42-4513180531,018 ftJan 1988
42-4513180621,051 ftDec 1987Oct 2014Yes

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 2026177098.932.87$17,511
Mar 20260089.753.15$0
Feb 20260063.503.75$0
Jan 20260059.138.00$0
Dec 2025176056.664.41$9,972
Nov 20250058.593.93$0
Oct 2025164059.383.30$9,738
Sep 20250062.743.08$0
Aug 2025164063.933.01$10,485
Jul 20250066.743.32$0
Jun 20250066.483.13$0
May 20250060.553.23$0
Apr 202593062.363.54$5,799
Mar 20250067.704.27$0
Feb 2025170070.884.34$12,050
Jan 20250074.324.28$0
Dec 20240068.993.12$0
Nov 20240069.052.20$0
Oct 2024108071.372.28$7,708
Sep 20240069.612.36$0
Aug 20240075.632.06$0
Jul 2024126079.932.15$10,071
Jun 20240078.082.63$0
May 20240078.812.20$0
Apr 20240084.451.66$0
Mar 2024115080.301.55$9,235
Feb 20240076.091.78$0
Jan 202467073.023.30$4,892
Dec 20230071.262.61$0
Nov 2023117077.892.81$9,113
Oct 20230085.443.09$0
Sep 202368089.042.74$6,055
Aug 202384080.522.67$6,764
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 2023168075.112.47$12,618
Jan 20230076.533.39$0
Dec 20220076.415.73$0
Nov 20220085.005.65$0
Oct 2022100087.185.86$8,718
Sep 202273084.888.16$6,196
Aug 20220094.529.13$0
Jul 202200101.587.54$0
Jun 202200115.097.98$0
May 202200109.378.43$0
Apr 2022370104.226.84$3,856
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 2021173069.865.35$12,086
Aug 20210066.024.22$0
Jul 20210070.783.98$0
Jun 202121069.493.38$1,459
May 20210063.483.02$0
Apr 2021168060.362.76$10,140
Mar 20210061.302.72$0
Feb 20210057.805.55$0
Jan 20210050.412.81$0
Dec 2020170044.642.68$7,589
Nov 20200038.772.71$0
Oct 20200036.972.48$0
Sep 20200037.091.99$0
Aug 20200039.982.39$0
Jul 2020168038.371.83$6,446
Jun 20200034.901.69$0
May 20200016.921.81$0
Apr 20200014.751.80$0
Mar 202073030.341.86$2,215
Feb 20200049.881.98$0
Jan 20200057.252.09$0
Dec 2019106059.012.30$6,255
Nov 20190055.302.75$0
Oct 20190053.472.42$0
Sep 2019129055.052.66$7,101
Aug 20190053.112.30$0
Jul 20190056.272.46$0
Jun 201926052.782.49$1,372
May 20190058.482.74$0
Apr 2019117062.632.75$7,328
Mar 20190056.803.06$0
Feb 201970050.852.79$3,560
Jan 20190046.033.23$0
Dec 201873046.594.19$3,401
Nov 20180052.934.24$0
Oct 201869061.443.40$4,239
Sep 20180059.543.11$0
Aug 20180059.403.07$0
Jul 201825065.142.93$1,629
Jun 201886060.183.08$5,175
May 20180065.382.90$0
Apr 201859063.842.90$3,767
Mar 20180061.222.79$0
Feb 2018143061.782.77$8,835
Jan 20180062.874.01$0
Dec 20170057.272.92$0
Nov 201770055.423.12$3,879
Oct 20170049.292.98$0
Sep 2017115047.523.09$5,465
Aug 20170045.373.00$0
Jul 201767043.873.09$2,939
Jun 20170042.493.09$0
May 20170045.373.26$0
Apr 2017104047.933.21$4,985
Mar 20170046.772.98$0
Feb 201728050.452.95$1,413
Jan 20170049.413.42$0
Dec 20160048.763.72$0
Nov 201695042.492.64$4,037
Oct 201644046.193.09$2,032
Sep 20160041.553.10$0
Aug 20160041.442.92$0
Jul 20160041.622.92$0
Jun 201670045.352.69$3,175
May 20160042.521.99$0
Apr 201683036.561.99$3,034
Mar 20160033.011.79$0
Feb 2016109026.472.06$2,885
Jan 20160027.352.36$0
Dec 201560032.362.00$1,942
Nov 20150038.792.17$0
Oct 2015146043.552.43$6,358
Sep 20150042.992.76$0
Aug 20150040.162.87$0
Jul 20150048.152.95$0
Jun 2015171056.152.88$9,602
May 20150055.212.96$0
Apr 20150049.822.71$0
Mar 2015169042.892.93$7,248
Feb 20150044.662.98$0
Jan 20150043.433.10$0
Dec 20140054.693.59$0
Nov 20140070.464.25$0
Oct 2014170078.303.90$13,311
Sep 20140086.164.05$0
Aug 20140089.394.04$0
Jul 20140096.564.18$0
Jun 2014184098.164.74$18,061
May 20140094.734.73$0
Apr 20140095.944.81$0
Mar 20140095.895.06$0
Feb 20140097.406.19$0
Jan 2014168090.404.86$15,187
Dec 20130091.824.35$0
Nov 20130088.853.74$0
Oct 20130097.423.78$0
Sep 201300104.113.72$0
Aug 20131760104.253.52$18,348
Jul 201300102.523.72$0
Jun 20130094.403.93$0
May 20130094.834.15$0
Apr 20130093.964.28$0
Mar 2013138093.623.91$12,920
Feb 20130091.233.42$0
Jan 20130091.603.42$0
Dec 20120086.773.42$0
Nov 2012180086.953.62$15,651
Oct 20120089.383.40$0
Sep 201265094.672.92$6,154
Aug 20120092.662.91$0
Jul 20120085.133.02$0
Jun 20120079.822.52$0
May 2012110091.612.49$10,077
Apr 201200101.652.00$0
Mar 201200105.052.22$0
Feb 2012890101.102.57$8,998
Jan 20120098.092.73$0
Dec 2011118096.873.24$11,431
Nov 201130095.723.31$2,872
Oct 20110084.983.65$0
Sep 201166083.623.99$5,519
Aug 20110083.404.15$0
Jul 20110094.144.52$0
Jun 201186092.904.64$7,989
May 20110098.134.40$0
Apr 2011810105.964.33$8,583
Mar 20110096.364.06$0
Feb 2011118085.644.18$10,106
Jan 20110086.504.59$0
Dec 2010108085.734.35$9,259
Nov 20100080.843.80$0
Oct 20100078.103.51$0
Sep 20100072.633.98$0
Aug 201078073.684.42$5,747
Jul 20100072.554.74$0
Jun 201059070.364.91$4,151
May 201090071.124.24$6,401
Apr 20100081.694.12$0
Mar 2010115078.394.39$9,015
Feb 20100073.585.44$0
Jan 20100074.365.96$0
Dec 200954071.445.48$3,858
Nov 200965074.593.75$4,848
Oct 20090072.544.11$0
Sep 200975065.543.06$4,916
Aug 200941067.423.22$2,764
Jul 20090061.133.46$0
Jun 200991066.163.90$6,021
May 20090054.743.93$0
Apr 200984046.773.59$3,929
Mar 20090042.144.06$0
Feb 200995032.814.63$3,117
Jan 20090035.865.37$0
Dec 200885037.105.98$3,154
Nov 20080055.496.86$0
Oct 200868075.246.92$5,116
Sep 2008610101.767.88$6,207
Aug 200800114.228.48$0
Jul 20081150131.0811.39$15,074
Jun 200800131.3313.03$0
May 200800123.1711.57$0
Apr 20081440110.3110.45$15,885
Mar 200800101.909.66$0
Feb 20080092.538.77$0
Jan 2008108090.388.21$9,761
Dec 20070088.337.30$0
Nov 200793091.677.29$8,525
Oct 20070082.856.92$0
Sep 20070075.846.24$0
Aug 2007149069.066.39$10,290
Jul 20070070.906.39$0
Jun 20070062.007.55$0
May 2007117058.747.85$6,873
Apr 20070059.617.81$0
Mar 2007123056.927.30$7,001
Feb 20070055.108.22$0
Jan 20070050.306.73$0
Dec 200677056.656.92$4,362
Nov 20060054.207.62$0
Oct 2006145054.906.01$7,961
Sep 20060060.085.04$0
Aug 20060068.717.34$0
Jul 2006100069.376.34$6,937
Jun 20060066.286.38$0
May 2006126066.016.42$8,317
Apr 20060064.397.36$0
Mar 20060056.707.08$0
Feb 2006120057.597.75$6,911
Jan 20060060.598.93$0
Dec 200587054.9413.42$4,780
Nov 20050054.6910.59$0
Oct 2005124058.3413.80$7,234
Sep 20050061.4512.08$0
Aug 20050061.519.80$0
Jul 2005181055.697.84$10,080
Jun 20050052.337.38$0
May 20050045.226.65$0
Apr 20050049.207.36$0
Mar 200554050.377.15$2,720
Feb 2005103045.226.31$4,658
Jan 200591043.166.32$3,928
Dec 20040039.866.75$0
Nov 20040045.286.33$0
Oct 200491049.706.52$4,523
Sep 20040043.245.28$0
Aug 200448042.375.55$2,034
Jul 200440038.286.08$1,531
Jun 20040036.106.43$0
May 200455037.486.49$2,061
Apr 2004183034.475.86$6,308
Mar 20040034.365.53$0
Feb 20040032.455.51$0
Jan 200461032.036.30$1,954
Dec 20030030.266.30$0
Nov 2003140028.804.60$4,032
Oct 20030028.174.76$0
Sep 200394026.314.75$2,473
Aug 20030029.765.13$0
Jul 2003180029.415.17$5,294
Jun 20030028.565.98$0
May 200329026.595.97$771
Apr 20030026.675.41$0
Mar 2003167031.146.10$5,200
Feb 20030033.487.93$0
Jan 20030030.315.58$0
Dec 200246026.914.85$1,238
Nov 2002162024.664.14$3,995
Oct 20020026.464.23$0
Sep 20020027.443.64$0
Aug 2002108025.963.16$2,804
Jul 20020024.583.06$0
Jun 2002102023.733.34$2,420
May 20020024.663.58$0
Apr 200281023.653.51$1,916
Mar 2002137022.003.10$3,014
Feb 20020018.222.38$0
Jan 20020017.172.38$0
Dec 2001182016.932.36$3,081
Nov 20010018.072.41$0
Oct 20010019.782.53$0
Sep 2001186024.262.25$4,512
Aug 20010024.873.05$0
Jul 20010023.933.20$0
Jun 20010024.563.82$0
May 2001105025.524.31$2,680
Apr 20010024.685.34$0
Mar 2001112024.545.38$2,748
Feb 20010027.755.77$0
Jan 200159027.478.40$1,621
Dec 200067026.889.12$1,801
Nov 20000032.215.66$0
Oct 200083031.235.15$2,592
Sep 20000031.875.19$0
Aug 200087029.644.54$2,579
Jul 20000028.534.09$0
Jun 200099029.304.40$2,901
May 200092027.263.68$2,508
Apr 20000024.513.12$0
Mar 200075028.422.86$2,132
Feb 20000027.622.73$0
Jan 2000180025.272.48$4,549
Dec 19990024.282.42$0
Nov 1999123023.192.43$2,852
Oct 19990020.982.80$0
Sep 1999160021.752.62$3,480
Aug 19990019.262.88$0
Jul 19990017.892.37$0
Jun 199996015.942.36$1,530
May 19990015.792.32$0
Apr 199988015.102.21$1,329
Mar 199962012.471.84$773
Feb 199917609.981.82$1,756
Jan 19990010.381.90$0
Dec 1998009.201.77$0
Nov 19980010.892.19$0
Oct 1998123012.421.97$1,528
Sep 19980012.592.08$0
Aug 1998180011.301.91$2,034
Jul 19980011.742.24$0
Jun 19980011.242.24$0
May 199890012.622.21$1,136
Apr 19980013.042.51$0
Mar 199881012.802.31$1,037
Feb 1998168013.952.30$2,344
Jan 19980014.702.15$0
Dec 19970016.322.41$0
Nov 1997146018.193.09$2,656
Oct 19970019.253.15$0
Sep 1997180017.742.95$3,193
Aug 19970017.862.55$0
Jul 19970017.582.25$0
Jun 19970017.242.26$0
May 1997151018.972.31$2,864
Apr 19970017.882.08$0
Mar 1997174018.951.94$3,297
Feb 19970020.492.21$0
Jan 19970023.483.54$0
Dec 19960023.32$0
Nov 1996171021.97$3,757
Oct 19960023.31$0
Sep 19960022.22$0
Aug 19960020.26$0
Jul 19960019.55$0
Jun 19960018.73$0
May 19960019.43$0
Apr 19960021.51$0
Mar 19960019.38$0
Feb 1996163116.98$2,768
Jan 1996172117.07$2,936
Dec 19950117.19$0
Nov 1995184116.00$2,944
Oct 19950115.43$0
Sep 19950116.18$0
Aug 19950115.92$0
Jul 19950115.24$0
Jun 199587116.41$1,428
May 19950117.56$0
Apr 19950117.73$0
Mar 199579116.44$1,299
Feb 19950116.58$0
Jan 1995176115.92$2,802
Dec 19940115.03$0
Nov 19940115.90$0
Oct 19940115.58$0
Sep 19940115.29$0
Aug 199456116.13$903
Jul 19940117.56$0
Jun 1994142117.09$2,427
May 19940115.88$0
Apr 1994179114.14$2,531
Mar 19940112.46$0
Feb 19940112.50$0
Jan 19940112.66$0
Dec 19930112.33$0
Nov 1993155114.49$2,246
Oct 19930115.85$0
Sep 1993180115.03$2,705
Aug 19930115.66$0
Jul 19930115.46$0
Jun 1993175116.79$2,938
May 19930117.68$0
Apr 19930118.05$0
Mar 1993125118.14$2,268
Feb 1993175117.90$3,133
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.

Apr 2026 — as filed, then multipliedworked
Oil                  177 bbl  × $ 98.93 =    $17,511
Casinghead gas         0 Mcf  × $  2.87 =         $0

────────────────────────────────────────────────────
Month total                                  $17,511

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. 7C/O/12350 is the state's own key, not one this site invented.