WALTON, J. B., TRACT -B-

Operated by MAS OPERATING CO. (P-5 531346) in the KEYSTONE (COLBY) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 18413District 08Field 49129132Hydrogen sulphide fieldOilCasinghead gasSaveExport
Value, all time
$5.0 M
Jan 1993 – May 2026
Value, last 12 filed months
$191 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 157 leases and 1,140 wells, and the rule below applies to all of them.

Discovered
1939-12-31
as the register files it
Field class
Oil and gas
the register's own label
Between wells
880 ft
minimum
From a lease line
330 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.

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
OilDisposition99,279 bbl$4,410,466
Casinghead gasProduction147,559 Mcf$600,755
Total$5,011,221

22,631 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 31.9326, -103.0961. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.5 miles.

31.93259, -103.09610 · 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
20.0%
1 of 5 wells
With a plug date
0.0%
0 of 5 wells
Median depth
3,450 ft
5 wells filed one
Completion to plug
no well filed both dates

What the state filed about each well

On the RRC proration schedule
120.0%
A plug date is filed
00.0%
BothOn the schedule and plugged. Neither fact cancels the other.
00.0%
NeitherNo plug date, and not on the schedule.
480.0%

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 3,420 and 3,487 ft, median 3,450 ft, over the 5 wells that filed a depth.

Completions filed
Mar 1964 – May 1985
5 of 5 wells

5 wells

42-4951007923,487 ftMay 1985Yes
42-4951008033,485 ftMay 1965
42-4951008143,420 ftApr 1964
42-4951008253,450 ftApr 1964
42-4951007813,425 ftMar 1964

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 20261870106.413.05$19,899
Apr 2026189098.932.87$18,698
Mar 2026352089.753.15$31,592
Feb 2026180063.503.75$11,430
Jan 2026185059.138.00$10,939
Dec 2025179056.664.41$10,142
Nov 2025355058.593.93$20,799
Oct 2025191059.383.30$11,342
Sep 2025169062.743.08$10,603
Aug 2025190063.933.01$12,147
Jul 2025150066.743.32$10,011
Jun 2025354066.483.13$23,534
May 2025184060.553.23$11,141
Apr 2025363062.363.54$22,637
Mar 2025194067.704.27$13,134
Feb 2025171070.884.34$12,120
Jan 2025188074.324.28$13,972
Dec 2024187068.993.12$12,901
Nov 2024168069.052.20$11,600
Oct 2024372071.372.28$26,550
Sep 2024190069.612.36$13,226
Aug 2024360075.632.06$27,227
Jul 2024184079.932.15$14,707
Jun 2024180078.082.63$14,054
May 2024358078.812.20$28,214
Apr 2024190084.451.66$16,046
Mar 2024359080.301.55$28,828
Feb 2024169076.091.78$12,859
Jan 2024178073.023.30$12,998
Dec 2023382071.262.61$27,221
Nov 2023176077.892.81$13,709
Oct 2023338085.443.09$28,879
Sep 2023340089.042.74$30,274
Aug 2023172080.522.67$13,849
Jul 2023353074.852.64$26,422
Jun 2023169068.962.26$11,654
May 2023174070.622.23$12,288
Apr 2023174078.122.24$13,593
Mar 2023347072.852.39$25,279
Feb 2023168075.112.47$12,618
Jan 2023181076.533.39$13,852
Dec 2022337076.415.73$25,750
Nov 2022170085.005.65$14,450
Oct 2022170087.185.86$14,821
Sep 2022296084.888.16$25,124
Aug 2022181094.529.13$17,108
Jul 20223370101.587.54$34,232
Jun 20221780115.097.98$20,486
May 202200109.378.43$0
Apr 20221750104.226.84$18,239
Mar 20221740108.885.08$18,945
Feb 2022171091.054.86$15,570
Jan 2022170081.844.54$13,913
Dec 2021333071.323.90$23,750
Nov 2021161077.435.24$12,466
Oct 202117157479.795.71$16,924
Sep 2021167069.865.35$11,667
Aug 2021167066.024.22$11,025
Jul 2021166070.783.98$11,749
Jun 2021169069.493.38$11,744
May 20210063.483.02$0
Apr 20210060.362.76$0
Mar 2021169061.302.72$10,360
Feb 20211872957.805.55$10,969
Jan 2021169050.412.81$8,519
Dec 2020185044.642.68$8,258
Nov 2020172038.772.71$6,668
Oct 2020166036.972.48$6,137
Sep 2020183037.091.99$6,787
Aug 20200039.982.39$0
Jul 20200038.371.83$0
Jun 2020145034.901.69$5,061
May 2020178016.921.81$3,012
Apr 20200014.751.80$0
Mar 2020172030.341.86$5,218
Feb 2020171049.881.98$8,529
Jan 2020179057.252.09$10,248
Dec 2019160059.012.30$9,442
Nov 2019176055.302.75$9,733
Oct 20190053.472.42$0
Sep 2019162055.052.66$8,918
Aug 20190053.112.30$0
Jul 20190056.272.46$0
Jun 2019176052.782.49$9,289
May 2019179058.482.74$10,468
Apr 20190062.632.75$0
Mar 2019155056.803.06$8,804
Feb 2019166050.852.79$8,441
Jan 2019181246.033.23$8,338
Dec 20181763946.594.19$8,363
Nov 201817813252.934.24$9,981
Oct 201817713961.443.40$11,347
Sep 2018090159.543.11$2,800
Aug 20181791,30459.403.07$14,631
Jul 20181592,11865.142.93$16,567
Jun 2018049860.183.08$1,532
May 201817722165.382.90$12,213
Apr 20181881,09663.842.90$15,181
Mar 201818186061.222.79$13,478
Feb 201815069361.782.77$11,184
Jan 2018086362.874.01$3,460
Dec 20171551,13357.272.92$12,187
Nov 20171761,07955.423.12$13,119
Oct 201718194449.292.98$11,738
Sep 201715983247.523.09$10,124
Aug 201736653645.373.00$18,216
Jul 2017094043.873.09$2,902
Jun 201730027442.493.09$13,593
May 2017027845.373.26$907
Apr 201718551247.933.21$10,511
Mar 201716770846.772.98$9,923
Feb 201718045350.452.95$10,419
Jan 201717832749.413.42$9,913
Dec 201632523948.763.72$16,737
Nov 201616623842.492.64$7,683
Oct 201617422646.193.09$8,735
Sep 20161695241.553.10$7,183
Aug 20161779341.442.92$7,607
Jul 201618210041.622.92$7,867
Jun 201617512845.352.69$8,280
May 201618011242.521.99$7,877
Apr 201617411436.561.99$6,588
Mar 201618011633.011.79$6,150
Feb 201617610026.472.06$4,865
Jan 20161818927.352.36$5,161
Dec 20151909532.362.00$6,339
Nov 20151839538.792.17$7,304
Oct 201518012943.552.43$8,152
Sep 2015183042.992.76$7,867
Aug 20151609940.162.87$6,710
Jul 20151768348.152.95$8,719
Jun 20151738356.152.88$9,953
May 20151807955.212.96$10,171
Apr 20151752849.822.71$8,794
Mar 20151825442.892.93$7,964
Feb 20151825944.662.98$8,304
Jan 20151845943.433.10$8,174
Dec 20141909454.693.59$10,729
Nov 20141867070.464.25$13,403
Oct 20141847078.303.90$14,680
Sep 201407586.164.05$303
Aug 201437014989.394.04$33,676
Jul 201405496.564.18$226
Jun 20141236398.164.74$12,372
May 20141859194.734.73$17,955
Apr 20141899295.944.81$18,575
Mar 201418710195.895.06$18,442
Feb 201419640197.406.19$21,573
Jan 201418238290.404.86$18,310
Dec 201315938891.824.35$16,289
Nov 201318735788.853.74$17,950
Oct 201337227697.423.78$37,283
Sep 20130289104.113.72$1,074
Aug 2013365262104.253.52$38,974
Jul 20130269102.523.72$1,000
Jun 201317325394.403.93$17,326
May 201317225494.834.15$17,365
Apr 201333912193.964.28$32,371
Mar 2013026793.623.91$1,045
Feb 201317133391.233.42$16,739
Jan 201318412391.603.42$17,275
Dec 201218542086.773.42$17,489
Nov 201217926986.953.62$16,539
Oct 201217410889.383.40$15,919
Sep 20121727794.672.92$16,508
Aug 201218310292.662.91$17,253
Jul 201218023485.133.02$16,030
Jun 201217132379.822.52$14,463
May 201218536291.612.49$17,849
Apr 20120319101.652.00$637
Mar 2012180612105.052.22$20,269
Feb 2012194578101.102.57$21,099
Jan 201218064498.092.73$19,417
Dec 201117849296.873.24$18,837
Nov 201134652795.723.31$34,864
Oct 201117738784.983.65$16,453
Sep 2011017383.623.99$690
Aug 201118016183.404.15$15,680
Jul 201118119594.144.52$17,920
Jun 201117835692.904.64$18,188
May 201117560398.134.40$19,829
Apr 2011352401105.964.33$39,036
Mar 201103096.364.06$122
Feb 201117916885.644.18$16,032
Jan 2011182086.504.59$15,743
Dec 201018246685.734.35$17,629
Nov 2010044280.843.80$1,678
Oct 201017333478.103.51$14,683
Sep 201017839772.633.98$14,508
Aug 201035744973.684.42$28,288
Jul 2010050372.554.74$2,382
Jun 201034953670.364.91$27,188
May 201017750871.124.24$14,740
Apr 201017647781.694.12$16,344
Mar 201018047278.394.39$16,182
Feb 201017752173.585.44$15,859
Jan 201017459874.365.96$16,505
Dec 200917758971.445.48$15,875
Nov 200934159974.593.75$27,682
Oct 200917945472.544.11$14,851
Sep 200917750765.543.06$13,154
Aug 200917745067.423.22$13,382
Jul 200917519161.133.46$11,359
Jun 200935647466.163.90$25,399
May 200918158154.743.93$12,189
Apr 200917354346.773.59$10,039
Mar 200917970642.144.06$10,409
Feb 200934766132.814.63$14,447
Jan 200918064635.865.37$9,924
Dec 200817366937.105.98$10,417
Nov 200818686955.496.86$16,283
Oct 200817960575.246.92$17,656
Sep 2008361324101.767.88$39,288
Aug 20080719114.228.48$6,099
Jul 2008174614131.0811.39$29,801
Jun 2008176730131.3313.03$32,628
May 2008353730123.1711.57$51,928
Apr 20081791,105110.3110.45$31,298
Mar 20081711,253101.909.66$29,534
Feb 20081721,08792.538.77$25,449
Jan 200834392590.388.21$38,591
Dec 20071681,05988.337.30$22,572
Nov 20071731,10291.677.29$23,894
Oct 200733085882.856.92$33,280
Sep 200716570175.846.24$16,891
Aug 200717261169.066.39$15,781
Jul 20073771,02470.906.39$33,271
Jun 200717156962.007.55$14,897
May 200717062258.747.85$14,866
Apr 200735047459.617.81$24,563
Mar 200717264356.927.30$14,485
Feb 200716959455.108.22$14,192
Jan 200717359450.306.73$12,698
Dec 200618181356.656.92$15,878
Nov 200617324654.207.62$11,251
Oct 200616971154.906.01$13,554
Sep 200634363460.085.04$23,801
Aug 200617654368.717.34$16,079
Jul 200617734569.376.34$14,467
Jun 200617240266.286.38$13,966
May 200634152366.016.42$25,870
Apr 200617172864.397.36$16,369
Mar 200634675856.707.08$24,987
Feb 200617967357.597.75$15,525
Jan 200617945860.598.93$14,937
Dec 200517233754.9413.42$13,971
Nov 200534733054.6910.59$22,472
Oct 200517329758.3413.80$14,190
Sep 200517329461.4512.08$14,182
Aug 200534947161.519.80$26,081
Jul 200517855455.697.84$14,258
Jun 200517436852.337.38$11,822
May 200535335445.226.65$18,317
Apr 200518042949.207.36$12,014
Mar 200535252650.377.15$21,494
Feb 200518044745.226.31$10,961
Jan 200517352043.166.32$10,754
Dec 200435155139.866.75$17,711
Nov 200417753045.286.33$11,370
Oct 200434255449.706.52$20,607
Sep 200417750443.245.28$10,317
Aug 200435048142.375.55$17,499
Jul 200417540238.286.08$9,145
Jun 200435341436.106.43$15,407
May 200417636137.486.49$8,941
Apr 200435134134.475.86$14,097
Mar 200418038234.365.53$8,297
Feb 200417836132.455.51$7,765
Jan 200453928932.036.30$19,085
Dec 2003019830.266.30$1,248
Nov 200336124828.804.60$11,536
Oct 200317627928.174.76$6,286
Sep 200317532026.314.75$6,124
Aug 200335252429.765.13$13,163
Jul 200317460129.415.17$8,225
Jun 200334453228.565.98$13,008
May 200317451426.595.97$7,697
Apr 200335351826.675.41$12,215
Mar 200317843931.146.10$8,219
Feb 200336353733.487.93$16,409
Jan 200335549630.315.58$13,529
Dec 200217829526.914.85$6,222
Nov 200234517724.664.14$9,240
Oct 200235424626.464.23$10,407
Sep 200217985227.443.64$8,009
Aug 200235329025.963.16$10,081
Jul 200234725624.583.06$9,313
Jun 200235140723.733.34$9,688
May 200217089024.663.58$7,382
Apr 200235075923.653.51$10,943
Mar 200235961722.003.10$9,812
Feb 200235452318.222.38$7,692
Jan 2002052917.172.38$1,257
Dec 200135548416.932.36$7,155
Nov 200117757418.072.41$4,579
Oct 200135990919.782.53$9,400
Sep 200117863424.262.25$5,746
Aug 200135375124.873.05$11,072
Jul 200134892223.933.20$11,275
Jun 200117466224.563.82$6,805
May 200135544125.524.31$10,959
Apr 20015462,20724.685.34$25,250
Mar 200102,13924.545.38$11,500
Feb 20017011,64727.755.77$28,951
Jan 200118369227.478.40$10,839
Dec 200018553126.889.12$9,817
Nov 200036160832.215.66$15,068
Oct 200018175531.235.15$9,537
Sep 200036576231.875.19$15,585
Aug 200018877729.644.54$9,100
Jul 200017846028.534.09$6,960
Jun 20003141129.304.40$9,249
May 2000360027.263.68$9,814
Apr 2000366024.513.12$8,971
Mar 2000182028.422.86$5,172
Feb 2000360027.622.73$9,943
Jan 2000177025.272.48$4,473
Dec 1999184024.282.42$4,468
Nov 1999172023.192.43$3,989
Oct 1999334020.982.80$7,007
Sep 1999345021.752.62$7,504
Aug 1999318019.262.88$6,125
Jul 1999364017.892.37$6,512
Jun 1999339015.942.36$5,404
May 1999347015.792.32$5,479
Apr 1999346015.102.21$5,225
Mar 1999351012.471.84$4,377
Feb 199933509.981.82$3,343
Jan 1999342010.381.90$3,550
Dec 1998352219.201.77$3,276
Nov 1998346010.892.19$3,768
Oct 199834734412.421.97$4,987
Sep 199834639812.592.08$5,185
Aug 199834984611.301.91$5,557
Jul 19983421,14811.742.24$6,583
Jun 199852071711.242.24$7,449
May 199851587012.622.21$8,419
Apr 199837694813.042.51$7,278
Mar 199801,03012.802.31$2,379
Feb 19986931,06313.952.30$12,111
Jan 1998064014.702.15$1,379
Dec 199738364016.322.41$7,794
Nov 199736491618.193.09$9,450
Oct 199739172319.253.15$9,804
Sep 199739274017.742.95$9,141
Aug 199738472217.862.55$8,703
Jul 199737876817.582.25$8,371
Jun 199752488817.242.26$11,038
May 199738490818.972.31$9,381
Apr 19973591,08417.882.08$8,677
Mar 19973981,12318.951.94$9,720
Feb 199739197520.492.21$10,162
Jan 199739355723.483.54$11,199
Dec 199638959023.32$9,071
Nov 199639054721.97$8,568
Oct 199639951223.31$9,301
Sep 199653959022.22$11,977
Aug 199639271720.26$7,942
Jul 199638090119.55$7,429
Jun 199636864118.73$6,893
May 199650086619.43$9,715
Apr 199636274621.51$7,787
Mar 199654375619.38$10,523
Feb 199635359616.98$5,994
Jan 199636836817.07$6,282
Dec 199553873417.19$9,248
Nov 199530283416.00$4,832
Oct 199552686115.43$8,116
Sep 199536058016.18$5,825
Aug 199554121715.92$8,613
Jul 199535729615.24$5,441
Jun 199554121216.41$8,878
May 199554036017.56$9,482
Apr 199536241117.73$6,418
Mar 199550034516.44$8,220
Feb 199555527516.58$9,202
Jan 199554224415.92$8,629
Dec 199436323415.03$5,456
Nov 199455129015.90$8,761
Oct 199436024115.58$5,609
Sep 199454224015.29$8,287
Aug 199454122916.13$8,726
Jul 199450856417.56$8,920
Jun 199435657517.09$6,084
May 199463349415.88$10,052
Apr 199435440314.14$5,006
Mar 199452180812.46$6,492
Feb 199451634712.50$6,450
Jan 199470071012.66$8,862
Dec 199329663812.33$3,650
Nov 199369640214.49$10,085
Oct 199368845115.85$10,905
Sep 199337818315.03$5,681
Aug 199337424415.66$5,857
Jul 199337826215.46$5,844
Jun 199336126016.79$6,061
May 199353335317.68$9,423
Apr 199334932818.05$6,299
Mar 199336243918.14$6,567
Feb 199367737417.90$12,118
Jan 1993036316.93$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.

May 2026 — as filed, then multipliedworked
Oil                  187 bbl  × $106.41 =    $19,899
Casinghead gas         0 Mcf  × $  3.05 =         $0

────────────────────────────────────────────────────
Month total                                  $19,899

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/18413 is the state's own key, not one this site invented.