SHANNON ESTATE

Operated by CLARK OIL CO. (P-5 157689) in the SHANNON (SAN ANDRES) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 1275District 7CField 82663568Hydrogen sulphide fieldOilCasinghead gasSaveExport
Value, all time
$6.0 M
Jan 1993 – May 2026
Value, last 12 filed months
$326 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 92 leases and 473 wells, and the rule below applies to all of them.

Discovered
1943-03-01
as the register files it
Field class
Oil and gas
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 20 acres. The field rule took effect on 2011-05-24.

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: SEE COMM. LETTER 1/22/65 FOR TESTING

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
OilDisposition110,320 bbl$5,987,122
Casinghead gasProduction19 Mcf$20
Total$5,987,141

16 Mcf of this lease's gas, across 16 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 30.8856, -101.6529. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.3 miles.

30.88577, -101.65265 · 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
33.3%
2 of 6 wells
With a plug date
50.0%
3 of 6 wells
Median depth
2,335 ft
4 wells filed one
Completion to plug
1 well filed both, dated out of order

What the state filed about each well

On the RRC proration schedule
233.3%
A plug date is filed
350.0%
BothOn the schedule and plugged. Neither fact cancels the other.
233.3%
NeitherNo plug date, and not on the schedule.
350.0%

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 2,263 and 2,410 ft, median 2,335 ft, over the 4 wells that filed a depth.

Completions filed
Sep 2012 – Nov 2012
2 of 6 wells; 4 filed none
Plug dates filed
Jul 1996 – Jun 2024
3 of 6 wells; 3 filed none

Last completion to plug: no median is published. 1 well on this lease filed both dates, and on that one the last completion is dated after the plug date, so there is no interval to take a median of. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

6 wells

42-1050275912,263 ftJun 2024Yes
42-1050278572,286 ftJul 1996Yes
42-105027662
42-105027826
42-1050277132,410 ftNov 2012Jul 1996
42-105027795D2,384 ftSep 2012

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 20262020106.413.05$21,495
Apr 20260098.932.87$0
Mar 2026176089.753.15$15,796
Feb 2026615063.503.75$39,053
Jan 2026453059.138.00$26,786
Dec 2025336056.664.41$19,038
Nov 2025666058.593.93$39,021
Oct 2025632059.383.30$37,528
Sep 2025494062.743.08$30,994
Aug 2025513063.933.01$32,796
Jul 2025482066.743.32$32,169
Jun 2025475066.483.13$31,578
May 2025330060.553.23$19,982
Apr 20250062.363.54$0
Mar 2025160067.704.27$10,832
Feb 20250070.884.34$0
Jan 20250074.324.28$0
Dec 2024158068.993.12$10,900
Nov 20240069.052.20$0
Oct 2024157071.372.28$11,205
Sep 2024159069.612.36$11,068
Aug 2024177075.632.06$13,387
Jul 2024480079.932.15$38,366
Jun 20240078.082.63$0
May 2024357078.812.20$28,135
Apr 2024328084.451.66$27,700
Mar 2024343080.301.55$27,543
Feb 2024342076.091.78$26,023
Jan 2024360073.023.30$26,287
Dec 2023160071.262.61$11,402
Nov 2023506077.892.81$39,412
Oct 2023163085.443.09$13,927
Sep 2023367089.042.74$32,678
Aug 2023160080.522.67$12,883
Jul 2023503074.852.64$37,650
Jun 2023316068.962.26$21,791
May 2023469070.622.23$33,121
Apr 2023150078.122.24$11,718
Mar 2023460072.852.39$33,511
Feb 2023297075.112.47$22,308
Jan 2023149076.533.39$11,403
Dec 2022153076.415.73$11,691
Nov 2022629085.005.65$53,465
Oct 2022159087.185.86$13,862
Sep 2022438084.888.16$37,177
Aug 2022173094.529.13$16,352
Jul 20223190101.587.54$32,404
Jun 20224910115.097.98$56,509
May 20223430109.378.43$37,514
Apr 20221550104.226.84$16,154
Mar 20223440108.885.08$37,455
Feb 2022339091.054.86$30,866
Jan 2022325081.844.54$26,598
Dec 2021297071.323.90$21,182
Nov 2021463077.435.24$35,850
Oct 2021328079.795.71$26,171
Sep 2021317069.865.35$22,146
Aug 2021314066.024.22$20,730
Jul 2021327070.783.98$23,145
Jun 2021333069.493.38$23,140
May 2021335063.483.02$21,266
Apr 2021333060.362.76$20,100
Mar 2021517061.302.72$31,692
Feb 20210057.805.55$0
Jan 2021309050.412.81$15,577
Dec 2020323044.642.68$14,419
Nov 2020159038.772.71$6,164
Oct 2020302036.972.48$11,165
Sep 2020298037.091.99$11,053
Aug 2020326039.982.39$13,033
Jul 2020315038.371.83$12,087
Jun 2020322034.901.69$11,238
May 20200016.921.81$0
Apr 2020345014.751.80$5,089
Mar 2020339030.341.86$10,285
Feb 2020334049.881.98$16,660
Jan 2020334057.252.09$19,122
Dec 2019511059.012.30$30,154
Nov 2019173055.302.75$9,567
Oct 2019514053.472.42$27,484
Sep 2019163055.052.66$8,973
Aug 2019343053.112.30$18,217
Jul 2019341056.272.46$19,188
Jun 2019513052.782.49$27,076
May 2019334058.482.74$19,532
Apr 2019274062.632.75$17,161
Mar 2019323056.803.06$18,346
Feb 2019504050.852.79$25,628
Jan 2019550046.033.23$25,317
Dec 2018504046.594.19$23,481
Nov 2018513052.934.24$27,153
Oct 2018167061.443.40$10,260
Sep 2018502059.543.11$29,889
Aug 2018350059.403.07$20,790
Jul 2018520065.142.93$33,873
Jun 2018504060.183.08$30,331
May 2018340065.382.90$22,229
Apr 2018335063.842.90$21,386
Mar 2018506061.222.79$30,977
Feb 2018497061.782.77$30,705
Jan 2018494062.874.01$31,058
Dec 2017342057.272.92$19,586
Nov 2017332055.423.12$18,399
Oct 2017508049.292.98$25,039
Sep 2017492047.523.09$23,380
Aug 2017331045.373.00$15,017
Jul 2017331043.873.09$14,521
Jun 2017327042.493.09$13,894
May 2017539045.373.26$24,454
Apr 2017534047.933.21$25,595
Mar 2017362046.772.98$16,931
Feb 2017543050.452.95$27,394
Jan 2017358049.413.42$17,689
Dec 2016540048.763.72$26,330
Nov 2016362042.492.64$15,381
Oct 2016533046.193.09$24,619
Sep 2016354041.553.10$14,709
Aug 2016534041.442.92$22,129
Jul 2016708041.622.92$29,467
Jun 2016353045.352.69$16,009
May 2016353042.521.99$15,010
Apr 2016696036.561.99$25,446
Mar 2016519033.011.79$17,132
Feb 2016350026.472.06$9,265
Jan 2016539027.352.36$14,742
Dec 2015523032.362.00$16,924
Nov 2015515038.792.17$19,977
Oct 2015526043.552.43$22,907
Sep 2015360042.992.76$15,476
Aug 2015692040.162.87$27,791
Jul 2015343048.152.95$16,515
Jun 2015341056.152.88$19,147
May 2015531055.212.96$29,317
Apr 2015542049.822.71$27,002
Mar 2015535042.892.93$22,946
Feb 2015362044.662.98$16,167
Jan 2015557043.433.10$24,191
Dec 2014384054.693.59$21,001
Nov 2014384070.464.25$27,057
Oct 2014376078.303.90$29,441
Sep 2014558086.164.05$48,077
Aug 2014565089.394.04$50,505
Jul 2014370096.564.18$35,727
Jun 20140098.164.74$0
May 2014179094.734.73$16,957
Apr 2014184095.944.81$17,653
Mar 2014186095.895.06$17,836
Feb 20140097.406.19$0
Jan 2014355090.404.86$32,092
Dec 2013191091.824.35$17,538
Nov 2013179088.853.74$15,904
Oct 2013366097.423.78$35,656
Sep 20133780104.113.72$39,354
Aug 20133780104.253.52$39,407
Jul 20135570102.523.72$57,104
Jun 2013336094.403.93$31,718
May 2013183094.834.15$17,354
Apr 2013529093.964.28$49,705
Mar 2013551093.623.91$51,585
Feb 2013540091.233.42$49,264
Jan 20131,114091.603.42$102,042
Dec 2012355086.773.42$30,803
Nov 20121,055086.953.62$91,732
Oct 20120089.383.40$0
Sep 20120094.672.92$0
Aug 20120092.662.91$0
Jul 20120085.133.02$0
Jun 2012364079.822.52$29,054
May 2012189091.612.49$17,314
Apr 20121770101.652.00$17,992
Mar 20123570105.052.22$37,503
Feb 201200101.102.57$0
Jan 2012181098.092.73$17,754
Dec 2011168096.873.24$16,274
Nov 2011184095.723.31$17,612
Oct 2011197084.983.65$16,741
Sep 2011177083.623.99$14,801
Aug 20110083.404.15$0
Jul 2011360094.144.52$33,890
Jun 20110092.904.64$0
May 2011192098.134.40$18,841
Apr 20113690105.964.33$39,099
Mar 2011187096.364.06$18,019
Feb 20110085.644.18$0
Jan 2011194086.504.59$16,781
Dec 2010189085.734.35$16,203
Nov 2010188080.843.80$15,198
Oct 2010167078.103.51$13,043
Sep 2010182072.633.98$13,219
Aug 20100073.684.42$0
Jul 20100072.554.74$0
Jun 2010335070.364.91$23,571
May 20100071.124.24$0
Apr 20100081.694.12$0
Mar 2010156078.394.39$12,229
Feb 20100073.585.44$0
Jan 2010196074.365.96$14,575
Dec 2009181071.445.48$12,931
Nov 20090074.593.75$0
Oct 2009177072.544.11$12,840
Sep 2009183065.543.06$11,994
Aug 2009150067.423.22$10,113
Jul 2009183061.133.46$11,187
Jun 2009347066.163.90$22,958
May 2009259054.743.93$14,178
Apr 2009263046.773.59$12,301
Mar 2009172042.144.06$7,248
Feb 2009253032.814.63$8,301
Jan 2009350035.865.37$12,551
Dec 2008179037.105.98$6,641
Nov 2008186055.496.86$10,321
Oct 2008367075.246.92$27,613
Sep 20081900101.767.88$19,334
Aug 20083640114.228.48$41,576
Jul 20081860131.0811.39$24,381
Jun 20083570131.3313.03$46,885
May 20081970123.1711.57$24,264
Apr 20083610110.3110.45$39,822
Mar 20083810101.909.66$38,824
Feb 2008186092.538.77$17,211
Jan 2008354090.388.21$31,995
Dec 2007177088.337.30$15,634
Nov 2007338091.677.29$30,984
Oct 2007167082.856.92$13,836
Sep 2007167075.846.24$12,665
Aug 2007330069.066.39$22,790
Jul 2007164070.906.39$11,628
Jun 2007159062.007.55$9,858
May 2007337058.747.85$19,795
Apr 2007333059.617.81$19,850
Mar 2007166056.927.30$9,449
Feb 2007329055.108.22$18,128
Jan 2007336050.306.73$16,901
Dec 2006167056.656.92$9,461
Nov 2006167054.207.62$9,051
Oct 2006335054.906.01$18,392
Sep 2006333060.085.04$20,007
Aug 2006162068.717.34$11,131
Jul 2006149069.376.34$10,336
Jun 2006334066.286.38$22,138
May 2006337066.016.42$22,245
Apr 2006167064.397.36$10,753
Mar 2006167056.707.08$9,469
Feb 2006327057.597.75$18,832
Jan 2006165060.598.93$9,997
Dec 2005166054.9413.42$9,120
Nov 2005338054.6910.59$18,485
Oct 2005335058.3413.80$19,544
Sep 2005500061.4512.08$30,725
Aug 20050061.519.80$0
Jul 2005480055.697.84$26,731
Jun 2005325052.337.38$17,007
May 2005332045.226.65$15,013
Apr 2005462049.207.36$22,730
Mar 2005488050.377.15$24,581
Feb 2005497045.226.31$22,474
Jan 2005327043.166.32$14,113
Dec 2004492039.866.75$19,611
Nov 2004150045.286.33$6,792
Oct 2004324049.706.52$16,103
Sep 2004160043.245.28$6,918
Aug 2004329042.375.55$13,940
Jul 2004160038.286.08$6,125
Jun 2004310036.106.43$11,191
May 2004147037.486.49$5,510
Apr 2004479034.475.86$16,511
Mar 20040034.365.53$0
Feb 20040032.455.51$0
Jan 2004323032.036.30$10,346
Dec 2003308030.266.30$9,320
Nov 2003148028.804.60$4,262
Oct 2003317028.174.76$8,930
Sep 2003161026.314.75$4,236
Aug 2003316029.765.13$9,404
Jul 2003310029.415.17$9,117
Jun 2003157028.565.98$4,484
May 2003316026.595.97$8,402
Apr 2003162026.675.41$4,321
Mar 2003315131.146.10$9,815
Feb 2003151133.487.93$5,063
Jan 2003303130.315.58$9,190
Dec 2002310026.914.85$8,342
Nov 2002309024.664.14$7,620
Oct 2002155026.464.23$4,101
Sep 2002323027.443.64$8,863
Aug 2002326025.963.16$8,463
Jul 2002320024.583.06$7,866
Jun 2002331023.733.34$7,855
May 2002315024.663.58$7,768
Apr 2002152023.653.51$3,595
Mar 2002300022.003.10$6,600
Feb 2002151018.222.38$2,751
Jan 2002305017.172.38$5,237
Dec 2001305016.932.36$5,164
Nov 2001163018.072.41$2,945
Oct 2001336019.782.53$6,646
Sep 2001304024.262.25$7,375
Aug 2001153024.873.05$3,805
Jul 2001169023.933.20$4,044
Jun 2001147024.563.82$3,610
May 2001509025.524.31$12,990
Apr 2001168024.685.34$4,146
Mar 2001471024.545.38$11,558
Feb 2001300027.755.77$8,325
Jan 2001117027.478.40$3,214
Dec 20000026.889.12$0
Nov 2000307032.215.66$9,888
Oct 2000156031.235.15$4,872
Sep 20000031.875.19$0
Aug 2000326029.644.54$9,663
Jul 20000028.534.09$0
Jun 2000159029.304.40$4,659
May 2000158027.263.68$4,307
Apr 20000024.513.12$0
Mar 2000169028.422.86$4,803
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 1998158011.742.24$1,855
Jun 1998158011.242.24$1,776
May 19980012.622.21$0
Apr 1998170013.042.51$2,217
Mar 1998161012.802.31$2,061
Feb 1998178013.952.30$2,483
Jan 1998176014.702.15$2,587
Dec 19970016.322.41$0
Nov 1997180018.193.09$3,274
Oct 1997338019.253.15$6,507
Sep 1997181017.742.95$3,211
Aug 1997357017.862.55$6,376
Jul 1997355017.582.25$6,241
Jun 1997357017.242.26$6,155
May 1997539018.972.31$10,225
Apr 1997550017.882.08$9,834
Mar 1997525018.951.94$9,949
Feb 1997529020.492.21$10,839
Jan 1997171023.483.54$4,015
Dec 1996165023.32$3,848
Nov 1996353021.97$7,755
Oct 1996183023.31$4,266
Sep 1996531022.22$11,799
Aug 1996529020.26$10,718
Jul 1996530019.55$10,362
Jun 1996699018.73$13,092
May 1996658019.43$12,785
Apr 1996168021.51$3,614
Mar 19960019.38$0
Feb 19960016.98$0
Jan 19960017.07$0
Dec 1995179017.19$3,077
Nov 19950016.00$0
Oct 1995144015.43$2,222
Sep 1995163016.18$2,637
Aug 19950015.92$0
Jul 19950015.24$0
Jun 1995157016.41$2,576
May 1995438017.56$7,691
Apr 1995161017.73$2,855
Mar 1995467016.44$7,677
Feb 1995343016.58$5,687
Jan 19950015.92$0
Dec 19940015.03$0
Nov 19940015.90$0
Oct 19940015.58$0
Sep 19940015.29$0
Aug 1994331016.13$5,339
Jul 19940017.56$0
Jun 1994460017.09$7,861
May 1994152015.88$2,414
Apr 1994293114.14$4,143
Mar 1994462112.46$5,757
Feb 1994458112.50$5,725
Jan 1994160112.66$2,026
Dec 1993627112.33$7,731
Nov 19930114.49$0
Oct 1993142115.85$2,251
Sep 1993600115.03$9,018
Aug 19930115.66$0
Jul 1993366115.46$5,658
Jun 1993334116.79$5,608
May 1993410117.68$7,249
Apr 1993333118.05$6,011
Mar 19930118.14$0
Feb 19930117.90$0
Jan 1993163116.93$2,760

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                  202 bbl  × $106.41 =    $21,495
Casinghead gas         0 Mcf  × $  3.05 =         $0

────────────────────────────────────────────────────
Month total                                  $21,495

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/1275 is the state's own key, not one this site invented.