RILEY, T. S. ESTATE "A"

Operated by KNOX INDUSTRIES, INC. (P-5 473105) in the G-M-K, SOUTH (SAN ANDRES) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 61909District 8AField 33477500Hydrogen sulphide fieldOilCasinghead gasSaveExport
Value, all time
$11.1 M
Jan 1993 – May 2026
Value, last 12 filed months
$145 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 10 leases and 84 wells, and the rule below applies to all of them.

Discovered
1963-07-06
as the register files it
Field class
Oil
the register's own label
Between wells
800 ft
minimum
From a lease line
467 ft
minimum

A drilling unit in this field needs at least 20 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: OPTIONAL 20 ACRE UNIT

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
OilDisposition283,078 bbl$10,979,386
Casinghead gasProduction33,187 Mcf$72,169
Total$11,051,555

13,300 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 (9)

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 32.7746, -102.4815. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.7 miles.

32.77540, -102.48113 · 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
55.6%
5 of 9 wells
With a plug date
55.6%
5 of 9 wells
Median depth
5,513 ft
9 wells filed one
Completion to plug
44.3 years
median over 4 wells

What the state filed about each well

On the RRC proration schedule
555.6%
A plug date is filed
555.6%
BothOn the schedule and plugged. Neither fact cancels the other.
555.6%
NeitherNo plug date, and not on the schedule.
444.4%

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, 9 of 9 wells. Median 5,513 ft, with the middle half between 5,505 and 5,539 ft; the shallowest is 5,500 ft and the deepest 5,630 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, 8 of 9 wells, Jun 1977 – Aug 1995. This is the LAST completion filed on each wellbore, not the first — a well recompleted in 2019 counts once, in the 2010s.

Completions filed
Jun 1977 – Aug 1995
8 of 9 wells; 1 filed none
Plug dates filed
Aug 2007 – Jul 2024
5 of 9 wells; 4 filed none

Last completion to plug: a median of 44.3 years across the 4 wells that filed both dates, with the middle half between 35.1 years and 46.6 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

9 wells

42-165315147W5,571 ftJan 2008Yes
42-1653151565,502 ftAug 1995
42-165314571BW5,515 ftJan 1994Aug 2007Yes
42-1653323485,630 ftJul 1985
42-1653131055,510 ftFeb 1978
42-1653129135,500 ftFeb 1978Jul 2024Yes
42-1653130945,505 ftFeb 1978
42-1653128025,539 ftJan 1978Apr 2020Yes
42-1653061215,513 ftJun 1977Jul 2024Yes

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 20261680106.413.05$17,877
Apr 2026171098.932.87$16,917
Mar 2026175089.753.15$15,706
Feb 2026169063.503.75$10,732
Jan 2026169059.138.00$9,993
Dec 2025167056.664.41$9,462
Nov 2025176058.593.93$10,312
Oct 2025169059.383.30$10,035
Sep 2025173062.743.08$10,854
Aug 2025163063.933.01$10,421
Jul 2025171066.743.32$11,413
Jun 2025171066.483.13$11,368
May 2025175060.553.23$10,596
Apr 2025178062.363.54$11,100
Mar 20250067.704.27$0
Feb 2025189070.884.34$13,396
Jan 2025100074.324.28$7,432
Dec 2024171068.993.12$11,797
Nov 2024144069.052.20$9,943
Oct 20240071.372.28$0
Sep 2024175069.612.36$12,182
Aug 2024186075.632.06$14,067
Jul 20240079.932.15$0
Jun 2024168078.082.63$13,117
May 2024171078.812.20$13,477
Apr 2024169084.451.66$14,272
Mar 2024171080.301.55$13,731
Feb 2024172076.091.78$13,087
Jan 2024173073.023.30$12,632
Dec 2023173071.262.61$12,328
Nov 20230077.892.81$0
Oct 2023173085.443.09$14,781
Sep 2023171089.042.74$15,226
Aug 2023168080.522.67$13,527
Jul 2023168074.852.64$12,575
Jun 2023171068.962.26$11,792
May 2023170070.622.23$12,005
Apr 2023174078.122.24$13,593
Mar 2023171072.852.39$12,457
Feb 2023172075.112.47$12,919
Jan 2023170076.533.39$13,010
Dec 2022171076.415.73$13,066
Nov 2022170085.005.65$14,450
Oct 2022174087.185.86$15,169
Sep 2022164084.888.16$13,920
Aug 2022167094.529.13$15,785
Jul 20221730101.587.54$17,573
Jun 202200115.097.98$0
May 20221710109.378.43$18,702
Apr 20221690104.226.84$17,613
Mar 20221690108.885.08$18,401
Feb 20220091.054.86$0
Jan 2022171081.844.54$13,995
Dec 20210071.323.90$0
Nov 2021173077.435.24$13,395
Oct 2021170079.795.71$13,564
Sep 2021169069.865.35$11,806
Aug 2021169066.024.22$11,157
Jul 2021171070.783.98$12,103
Jun 20210069.493.38$0
May 2021172063.483.02$10,919
Apr 2021171060.362.76$10,322
Mar 2021169061.302.72$10,360
Feb 2021173057.805.55$9,999
Jan 2021170050.412.81$8,570
Dec 20200044.642.68$0
Nov 2020170038.772.71$6,591
Oct 2020171036.972.48$6,322
Sep 2020171037.091.99$6,342
Aug 2020173039.982.39$6,917
Jul 20200038.371.83$0
Jun 2020170034.901.69$5,933
May 20200016.921.81$0
Apr 20200014.751.80$0
Mar 20200030.341.86$0
Feb 2020344049.881.98$17,159
Jan 2020174057.252.09$9,962
Dec 2019172059.012.30$10,150
Nov 2019346055.302.75$19,134
Oct 2019173053.472.42$9,250
Sep 2019174055.052.66$9,579
Aug 2019348053.112.30$18,482
Jul 2019174056.272.46$9,791
Jun 2019347052.782.49$18,315
May 2019172058.482.74$10,059
Apr 2019347062.632.75$21,733
Mar 2019343056.803.06$19,482
Feb 2019169050.852.79$8,594
Jan 2019171046.033.23$7,871
Dec 2018342046.594.19$15,934
Nov 2018182052.934.24$9,633
Oct 2018349061.443.40$21,443
Sep 2018174059.543.11$10,360
Aug 2018520059.403.07$30,888
Jul 2018349065.142.93$22,734
Jun 2018524060.183.08$31,534
May 2018348065.382.90$22,752
Apr 2018347063.842.90$22,152
Mar 2018515061.222.79$31,528
Feb 2018344061.782.77$21,252
Jan 2018554062.874.01$34,830
Dec 2017353057.272.92$20,216
Nov 2017372055.423.12$20,616
Oct 2017559049.292.98$27,553
Sep 2017188047.523.09$8,934
Aug 2017565045.373.00$25,634
Jul 2017548043.873.09$24,041
Jun 2017367042.493.09$15,594
May 2017553045.373.26$25,090
Apr 2017545047.933.21$26,122
Mar 2017367046.772.98$17,165
Feb 2017371050.452.95$18,717
Jan 2017522049.413.42$25,792
Dec 2016346048.763.72$16,871
Nov 2016541042.492.64$22,987
Oct 2016363046.193.09$16,767
Sep 2016540041.553.10$22,437
Aug 2016547041.442.92$22,668
Jul 2016452041.622.92$18,812
Jun 2016524045.352.69$23,763
May 2016267042.521.99$11,353
Apr 2016522036.561.99$19,084
Mar 2016529033.011.79$17,462
Feb 2016533026.472.06$14,109
Jan 2016533027.352.36$14,578
Dec 2015532032.362.00$17,216
Nov 2015265038.792.17$10,279
Oct 2015528043.552.43$22,994
Sep 2015429042.992.76$18,443
Aug 2015526040.162.87$21,124
Jul 2015267048.152.95$12,856
Jun 2015520056.152.88$29,198
May 2015530055.212.96$29,261
Apr 2015528049.822.71$26,305
Mar 2015532042.892.93$22,817
Feb 2015265044.662.98$11,835
Jan 2015270043.433.10$11,726
Dec 2014798054.693.59$43,643
Nov 2014264070.464.25$18,601
Oct 2014535078.303.90$41,891
Sep 2014534086.164.05$46,009
Aug 2014519089.394.04$46,393
Jul 2014523096.564.18$50,501
Jun 2014510098.164.74$50,062
May 2014526094.734.73$49,828
Apr 2014531095.944.81$50,944
Mar 2014524095.895.06$50,246
Feb 2014268097.406.19$26,103
Jan 2014535090.404.86$48,364
Dec 2013530091.824.35$48,665
Nov 2013483088.853.74$42,915
Oct 2013530097.423.78$51,633
Sep 20135260104.113.72$54,762
Aug 20135390104.253.52$56,191
Jul 20135290102.523.72$54,233
Jun 2013269094.403.93$25,394
May 2013513094.834.15$48,648
Apr 2013536093.964.28$50,363
Mar 2013475093.623.91$44,470
Feb 2013513091.233.42$46,801
Jan 2013534091.603.42$48,914
Dec 2012268086.773.42$23,254
Nov 2012473086.953.62$41,127
Oct 2012534089.383.40$47,729
Sep 2012269094.672.92$25,466
Aug 2012517092.662.91$47,905
Jul 2012662085.133.02$56,356
Jun 2012266079.822.52$21,232
May 2012539091.612.49$49,378
Apr 20125400101.652.00$54,891
Mar 20125310105.052.22$55,782
Feb 20122670101.102.57$26,994
Jan 2012272098.092.73$26,680
Dec 2011524096.873.24$50,760
Nov 2011535095.723.31$51,210
Oct 2011533084.983.65$45,294
Sep 2011520083.623.99$43,482
Aug 2011504083.404.15$42,034
Jul 2011499094.144.52$46,976
Jun 2011784092.904.64$72,834
May 2011263098.134.40$25,808
Apr 20115140105.964.33$54,463
Mar 2011535096.364.06$51,553
Feb 2011491085.644.18$42,049
Jan 2011271086.504.59$23,442
Dec 2010532085.734.35$45,608
Nov 2010535080.843.80$43,249
Oct 2010535078.103.51$41,784
Sep 2010525072.633.98$38,131
Aug 2010526073.684.42$38,756
Jul 2010534072.554.74$38,742
Jun 2010531070.364.91$37,361
May 2010531071.124.24$37,765
Apr 2010408081.694.12$33,330
Mar 2010768078.394.39$60,204
Feb 2010284073.585.44$20,897
Jan 2010518074.365.96$38,518
Dec 2009808071.445.48$57,724
Nov 2009538074.593.75$40,129
Oct 2009537072.544.11$38,954
Sep 2009794065.543.06$52,039
Aug 2009518067.423.22$34,924
Jul 2009769061.133.46$47,009
Jun 2009794066.163.90$52,531
May 2009527054.743.93$28,848
Apr 2009524046.773.59$24,507
Mar 2009793042.144.06$33,417
Feb 2009521032.814.63$17,094
Jan 2009521035.865.37$18,683
Dec 2008795037.105.98$29,495
Nov 2008534055.496.86$29,632
Oct 2008789075.246.92$59,364
Sep 20085320101.767.88$54,136
Aug 20087870114.228.48$89,891
Jul 20085080131.0811.39$66,589
Jun 20087640131.3313.03$100,336
May 20085270123.1711.57$64,911
Apr 20087980110.3110.45$88,027
Mar 20087650101.909.66$77,954
Feb 2008535092.538.77$49,504
Jan 2008796090.388.21$71,942
Dec 2007804088.337.30$71,017
Nov 2007524091.677.29$48,035
Oct 2007799082.856.92$66,197
Sep 2007528075.846.24$40,044
Aug 2007769069.066.39$53,107
Jul 2007532070.906.39$37,719
Jun 2007727062.007.55$45,074
May 2007808058.747.85$47,462
Apr 2007526059.617.81$31,355
Mar 2007789056.927.30$44,910
Feb 2007513055.108.22$28,266
Jan 2007806050.306.73$40,542
Dec 2006555056.656.92$31,441
Nov 2006767054.207.62$41,571
Oct 2006801054.906.01$43,975
Sep 2006806060.085.04$48,424
Aug 2006806068.717.34$55,380
Jul 2006801069.376.34$55,565
Jun 2006262066.286.38$17,365
May 2006794066.016.42$52,412
Apr 2006528064.397.36$33,998
Mar 2006776056.707.08$43,999
Feb 2006785057.597.75$45,208
Jan 2006804060.598.93$48,714
Dec 2005796054.9413.42$43,732
Nov 2005807054.6910.59$44,135
Oct 2005787058.3413.80$45,914
Sep 2005994061.4512.08$61,081
Aug 2005799061.519.80$49,146
Jul 2005788055.697.84$43,884
Jun 2005969052.337.38$50,708
May 2005792045.226.65$35,814
Apr 20057993349.207.36$39,554
Mar 20051,13015050.377.15$57,991
Feb 200572214545.226.31$33,564
Jan 200572716443.166.32$32,414
Dec 20041,09517139.866.75$44,801
Nov 200472517345.286.33$33,923
Oct 20041,07716149.706.52$54,576
Sep 200472312743.245.28$31,934
Aug 200472115042.375.55$31,381
Jul 200498815838.286.08$38,782
Jun 200472314036.106.43$27,001
May 200472616037.486.49$28,250
Apr 200495016334.475.86$33,701
Mar 20041,06815934.365.53$37,576
Feb 200436610232.455.51$12,439
Jan 20041,08610732.036.30$35,459
Dec 200371911530.266.30$22,482
Nov 20037323328.804.60$21,233
Oct 200371912928.174.76$20,868
Sep 200399215126.314.75$26,817
Aug 20031,03418229.765.13$31,705
Jul 200369117629.415.17$21,232
Jun 20031,00817728.565.98$29,847
May 200372919326.595.97$20,537
Apr 20031,08517226.675.41$29,867
Mar 200373111831.146.10$23,483
Feb 200373111233.487.93$25,362
Jan 20031,04615630.315.58$32,575
Dec 20021,08518026.914.85$30,071
Nov 200273617924.664.14$18,890
Oct 20021,06817226.464.23$28,987
Sep 200272517127.443.64$20,516
Aug 20021,01119225.963.16$26,853
Jul 20021,07218124.583.06$26,904
Jun 200296216623.733.34$23,382
May 20021,06116224.663.58$26,745
Apr 20021,05615723.653.51$25,526
Mar 20021,08817022.003.10$24,463
Feb 20021,08216918.222.38$20,116
Jan 200269814117.172.38$12,320
Dec 20011,04816916.932.36$18,142
Nov 20011,07217318.072.41$19,787
Oct 20011,05122319.782.53$21,353
Sep 20011,06221124.262.25$26,239
Aug 20011,05722924.873.05$26,987
Jul 20011,37422123.933.20$33,586
Jun 200172621524.563.82$18,653
May 20011,08920825.524.31$28,687
Apr 20011,08919524.685.34$27,917
Mar 20011,09019024.545.38$27,770
Feb 20011,05516127.755.77$30,205
Jan 20011,08117527.478.40$31,165
Dec 200098019726.889.12$28,140
Nov 20001,09818432.215.66$36,408
Oct 200070918331.235.15$23,084
Sep 20001,07117831.875.19$35,056
Aug 20001,06021029.644.54$32,372
Jul 20001,08220128.534.09$31,692
Jun 20001,07519929.304.40$32,373
May 200098125427.263.68$27,677
Apr 20001,05822524.513.12$26,633
Mar 20001,04522228.422.86$30,334
Feb 20001,03319127.622.73$29,052
Jan 20001,08425225.272.48$28,018
Dec 19991,43626824.282.42$35,516
Nov 19991,06426723.192.43$25,324
Oct 19991,08026920.982.80$23,413
Sep 19991,40622821.752.62$31,178
Aug 19991,07128919.262.88$21,459
Jul 19991,06932317.892.37$19,891
Jun 19991,37729415.942.36$22,644
May 19991,08833215.792.32$17,950
Apr 19991,45430915.102.21$22,638
Mar 19991,46232512.471.84$18,829
Feb 19991,4092669.981.82$14,545
Jan 19991,09828910.381.90$11,946
Dec 19981,4652869.201.77$13,985
Nov 19981,38023710.892.19$15,546
Oct 19981,44831412.421.97$18,602
Sep 19981,42529812.592.08$18,561
Aug 19981,44429711.301.91$16,884
Jul 19981,04324111.742.24$12,784
Jun 19981,44128411.242.24$16,832
May 19981,39629712.622.21$18,273
Apr 19981,3768513.042.51$18,156
Mar 19981,3665412.802.31$17,610
Feb 19981,463513.952.30$20,420
Jan 19981,4641814.702.15$21,560
Dec 19971,44614016.322.41$23,936
Nov 19971,43827218.193.09$26,997
Oct 19971,42529919.253.15$28,373
Sep 19971,44429117.742.95$26,476
Aug 19971,73730517.862.55$31,802
Jul 19971,08826917.582.25$19,731
Jun 19971,43923117.242.26$25,330
May 19971,44828718.972.31$28,131
Apr 19971,46027917.882.08$26,686
Mar 19971,46721918.951.94$28,224
Feb 19971,45526620.492.21$30,400
Jan 19971,47127123.483.54$35,498
Dec 19961,71961323.32$40,087
Nov 19961,46827121.97$32,252
Oct 19961,42629223.31$33,240
Sep 19961,42633322.22$31,686
Aug 19961,74533220.26$35,354
Jul 19961,45734219.55$28,484
Jun 19961,38730718.73$25,979
May 19961,36028719.43$26,425
Apr 19961,43331321.51$30,824
Mar 19961,63933919.38$31,764
Feb 19961,37424216.98$23,331
Jan 19961,38612517.07$23,659
Dec 19951,68326817.19$28,931
Nov 19951,78234616.00$28,512
Oct 19951,45921515.43$22,512
Sep 19951,74530416.18$28,234
Aug 19951,43328615.92$22,813
Jul 19951,44631515.24$22,037
Jun 19951,67835116.41$27,536
May 19951,73836817.56$30,519
Apr 19951,75738117.73$31,152
Mar 19951,81031616.44$29,756
Feb 19951,45735116.58$24,157
Jan 19951,83145915.92$29,150
Dec 19941,83347615.03$27,550
Nov 19941,46832815.90$23,341
Oct 19941,81245715.58$28,231
Sep 19941,09233515.29$16,697
Aug 19941,77432416.13$28,615
Jul 19941,44234717.56$25,322
Jun 19941,79437817.09$30,659
May 19941,37127315.88$21,771
Apr 19941,45021014.14$20,503
Mar 19941,09320312.46$13,619
Feb 199474510412.50$9,313
Jan 19941,09512312.66$13,863
Dec 19931,46312212.33$18,039
Nov 19931,09413514.49$15,852
Oct 19931,09516515.85$17,356
Sep 19931,44815915.03$21,763
Aug 19931,08418115.66$16,975
Jul 19931,44518215.46$22,340
Jun 19931,07120816.79$17,982
May 19931,09219717.68$19,307
Apr 19931,45117818.05$26,191
Mar 19931,45816818.14$26,448
Feb 19931,46715117.90$26,259
Jan 19931,47714016.93$25,006

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                  168 bbl  × $106.41 =    $17,877
Casinghead gas         0 Mcf  × $  3.05 =         $0

────────────────────────────────────────────────────
Month total                                  $17,877

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. 8A/O/61909 is the state's own key, not one this site invented.