MASTEN, F. O. "B"

Operated by EXTEX OPERATING COMPANY (P-5 257062) in the LEVELLAND field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 66964District 8AField 53411001Hydrogen sulphide fieldOilCasinghead gasSaveExport
Value, all time
$6.2 M
Feb 1993 – May 2026
Value, last 12 filed months
$52 k
at the published price for each month
Months reported
400
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 568 leases and 7,034 wells, and the rule below applies to all of them.

Discovered
1945-01-17
as the register files it
Field class
Oil
the register's own label
Between wells
880 ft
minimum
From a lease line
440 ft
minimum

A drilling unit in this field needs at least 21.25 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: ASSOCIATED GAS FIELD LEVELLAND (SAN ANDRES)

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
OilDisposition62,546 bbl$2,590,007
Casinghead gasProduction1,537,973 Mcf$3,638,859
Total$6,228,866

739,707 Mcf of this lease's gas, across 47 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 (7)

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 33.5255, -102.8871. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.8 miles.

33.52705, -102.88676 · 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
28.6%
2 of 7 wells
With a plug date
28.6%
2 of 7 wells
Median depth
4,998 ft
7 wells filed one
Completion to plug
18.9 years
median over 2 wells

What the state filed about each well

On the RRC proration schedule
228.6%
A plug date is filed
228.6%
BothOn the schedule and plugged. Neither fact cancels the other.
228.6%
NeitherNo plug date, and not on the schedule.
571.4%

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

Between 4,972 and 5,020 ft, median 4,998 ft, over the 7 wells that filed a depth.

Completions filed
Feb 1993 – Sep 1993
7 of 7 wells
Plug dates filed
Nov 2011 – Oct 2012
2 of 7 wells; 5 filed none

Last completion to plug: a median of 18.9 years across the 2 wells that filed both dates, with the middle half between 18.5 years and 19.3 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

7 wells

42-0793272484,998 ftSep 1993
42-0793272174,990 ftSep 1993
42-0793272395,004 ftSep 1993Nov 2011Yes
42-0793266545,018 ftMar 1993
42-0793266014,972 ftMar 1993Oct 2012Yes
42-0793265924,988 ftFeb 1993
42-0793265035,020 ftFeb 1993

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 (400)

Volume × price = value, one row per cycle. The price columns are the same series published on the prices page — nothing here is modelled.

400 months

May 2026900106.413.05$9,577
Apr 202686098.932.87$8,508
Mar 20260089.753.15$0
Feb 202690063.503.75$5,715
Jan 20260259.138.00$16
Dec 2025897356.664.41$5,365
Nov 202507358.593.93$287
Oct 2025838559.383.30$5,209
Sep 2025875862.743.08$5,637
Aug 202506963.933.01$208
Jul 2025845366.743.32$5,782
Jun 2025852566.483.13$5,729
May 20250060.553.23$0
Apr 202580062.363.54$4,989
Mar 20250067.704.27$0
Feb 202593070.884.34$6,592
Jan 202592074.324.28$6,837
Dec 202495068.993.12$6,554
Nov 20240969.052.20$20
Oct 202404871.372.28$110
Sep 2024806369.612.36$5,718
Aug 2024874575.632.06$6,673
Jul 2024824179.932.15$6,642
Jun 2024822878.082.63$6,476
May 202415078.812.20$189
Apr 2024974684.451.66$8,268
Mar 2024923280.301.55$7,437
Feb 202407976.091.78$141
Jan 2024968473.023.30$7,287
Dec 2023956271.262.61$6,932
Nov 2023897477.892.81$7,140
Oct 202301685.443.09$49
Sep 2023979289.042.74$8,889
Aug 2023887380.522.67$7,281
Jul 202306074.852.64$159
Jun 20237910968.962.26$5,694
May 2023010670.622.23$236
Apr 20238512178.122.24$6,911
Mar 20238711072.852.39$6,601
Feb 202312216475.112.47$9,568
Jan 2023018376.533.39$620
Dec 202210818076.415.73$9,284
Nov 202211016485.005.65$10,276
Oct 2022014887.185.86$868
Sep 202210817884.888.16$10,620
Aug 2022015494.529.13$1,406
Jul 2022106136101.587.54$11,793
Jun 2022108152115.097.98$13,642
May 20220120109.378.43$1,012
Apr 202210482104.226.84$11,400
Mar 202211052108.885.08$12,241
Feb 202204691.054.86$224
Jan 20221083081.844.54$8,975
Dec 202103471.323.90$133
Nov 20211082277.435.24$8,478
Oct 20211103079.795.71$8,948
Sep 202103069.865.35$161
Aug 20211081866.024.22$7,206
Jul 20211063470.783.98$7,638
Jun 20211022869.493.38$7,183
May 202104063.483.02$121
Apr 20211063460.362.76$6,492
Mar 20211124261.302.72$6,980
Feb 202102857.805.55$155
Jan 20211063850.412.81$5,450
Dec 202002844.642.68$75
Nov 20201063238.772.71$4,196
Oct 20201113436.972.48$4,188
Sep 2020112437.091.99$4,162
Aug 2020110439.982.39$4,407
Jul 20200438.371.83$7
Jun 202001234.901.69$20
May 20200016.921.81$0
Apr 2020111214.751.80$1,641
Mar 202006230.341.86$115
Feb 20201366449.881.98$6,910
Jan 20201447257.252.09$8,395
Dec 201913910259.012.30$8,437
Nov 2019011055.302.75$303
Oct 201913112853.472.42$7,314
Sep 20199514255.052.66$5,607
Aug 2019016453.112.30$378
Jul 20199410256.272.46$5,540
Jun 2019858452.782.49$4,696
May 201909658.482.74$263
Apr 20197610862.632.75$5,057
Mar 2019011856.803.06$361
Feb 2019010650.852.79$296
Jan 2019010646.033.23$342
Dec 2018010946.594.19$456
Nov 2018010052.934.24$424
Oct 2018010961.443.40$370
Sep 201801059.543.11$31
Aug 2018794059.403.07$4,815
Jul 20188511365.142.93$5,868
Jun 20181216460.183.08$7,479
May 20181185865.382.90$7,883
Apr 20181207963.842.90$7,890
Mar 201812023361.222.79$7,996
Feb 201812020661.782.77$7,983
Jan 201811822662.874.01$8,325
Dec 201712124157.272.92$7,634
Nov 2017027155.423.12$845
Oct 201711728749.292.98$6,623
Sep 201712128047.523.09$6,614
Aug 201711724645.373.00$6,047
Jul 201712128043.873.09$6,173
Jun 201711728042.493.09$5,836
May 201712330145.373.26$6,563
Apr 201712426047.933.21$6,778
Mar 2017028046.772.98$835
Feb 201712224050.452.95$6,864
Jan 201721313049.413.42$10,969
Dec 2016024648.763.72$916
Nov 20168024242.492.64$4,039
Oct 2016022846.193.09$705
Sep 20167023841.553.10$3,646
Aug 20166823841.442.92$3,514
Jul 20166626841.622.92$3,531
Jun 20166613045.352.69$3,342
May 20167824642.521.99$3,806
Apr 2016027036.561.99$538
Mar 2016674833.011.79$2,298
Feb 2016824826.472.06$2,270
Jan 2016017227.352.36$407
Dec 2015014832.362.00$296
Nov 2015015438.792.17$334
Oct 20158346643.552.43$4,745
Sep 2015016442.992.76$452
Aug 201501640.162.87$46
Jul 20151642048.152.95$7,956
Jun 201501856.152.88$52
May 2015821,84855.212.96$9,989
Apr 2015851,27649.822.71$7,688
Mar 201517095442.892.93$10,091
Feb 2015841,68044.662.98$8,751
Jan 20158785843.433.10$6,439
Dec 2014931,92954.693.59$12,014
Nov 2014932,85970.464.25$18,709
Oct 20141872,84478.303.90$25,736
Sep 201401,95086.164.05$7,889
Aug 201418877489.394.04$19,929
Jul 20149273596.564.18$11,956
Jun 20149379298.164.74$12,880
May 201410055894.734.73$12,110
Apr 201410280195.944.81$13,638
Mar 201410776595.895.06$14,129
Feb 201411264297.406.19$14,884
Jan 201411279590.404.86$13,989
Dec 201322169091.824.35$23,297
Nov 2013113088.853.74$10,040
Oct 2013109097.423.78$10,619
Sep 2013110111104.113.72$11,865
Aug 2013105768104.253.52$13,652
Jul 20130735102.523.72$2,733
Jun 201310365194.403.93$12,284
May 201310471194.834.15$12,812
Apr 201310974193.964.28$13,415
Mar 201311336393.623.91$11,999
Feb 201311660691.233.42$12,655
Jan 201322872691.603.42$23,368
Dec 201221777186.773.42$21,466
Nov 2012076886.953.62$2,784
Oct 201223178989.383.40$23,329
Sep 201211381994.672.92$13,088
Aug 201211484992.662.91$13,032
Jul 201212893385.133.02$13,715
Jun 20121331,02479.822.52$13,196
May 20122361,15691.612.49$24,496
Apr 201201,056101.652.00$2,109
Mar 20121111,084105.052.22$14,069
Feb 20120984101.102.57$2,529
Jan 201211399998.092.73$13,816
Dec 201111597196.873.24$14,286
Nov 20111381,02095.723.31$16,587
Oct 20111371,13284.983.65$15,772
Sep 201113984283.623.99$14,979
Aug 20111321,13383.404.15$15,710
Jul 20111321,08394.144.52$17,319
Jun 20111331,17392.904.64$17,798
May 20111311,30798.134.40$18,612
Apr 20111341,209105.964.33$19,438
Mar 201112995096.364.06$16,285
Feb 2011094985.644.18$3,967
Jan 20111311,23686.504.59$17,003
Dec 20101271,23485.734.35$16,253
Nov 20101201,14080.843.80$14,027
Oct 201001,35578.103.51$4,755
Sep 201011393472.633.98$11,924
Aug 20101041,19673.684.42$12,948
Jul 201001,05372.554.74$4,988
Jun 201017989070.364.91$16,965
May 2010088871.124.24$3,761
Apr 201001,25881.694.12$5,186
Mar 201001,34578.394.39$5,903
Feb 2010941,41473.585.44$14,612
Jan 201001,70874.365.96$10,187
Dec 20091031,70171.445.48$16,686
Nov 200901,77074.593.75$6,640
Oct 20091991,68072.544.11$21,341
Sep 20091311,75965.543.06$13,977
Aug 20091322,21767.423.22$16,035
Jul 200902,18061.133.46$7,553
Jun 200902,18866.163.90$8,522
May 20091312,78254.743.93$18,092
Apr 20091352,74346.773.59$16,154
Mar 20091322,52042.144.06$15,791
Feb 20091231,08832.814.63$9,076
Jan 20091202,27335.865.37$16,511
Dec 20081222,86137.105.98$21,627
Nov 20082462,89555.496.86$33,511
Oct 20081263,07575.246.92$30,765
Sep 200802,079101.767.88$16,376
Aug 20081283,275114.228.48$42,402
Jul 20082553,204131.0811.39$69,917
Jun 200802,993131.3313.03$39,007
May 20081343,271123.1711.57$54,364
Apr 20081293,328110.3110.45$49,024
Mar 20081313,590101.909.66$48,043
Feb 20081343,24892.538.77$40,886
Jan 20082683,45390.388.21$52,556
Dec 20071333,66688.337.30$38,517
Nov 20071343,54791.677.29$38,147
Oct 20072673,70282.856.92$47,746
Sep 20071383,60475.846.24$32,970
Aug 20072702,71769.066.39$36,002
Jul 20072723,51470.906.39$41,732
Jun 20072783,04262.007.55$40,198
May 20071422,70358.747.85$29,550
Apr 20072862,32959.617.81$35,227
Mar 20071432,79956.927.30$28,578
Feb 20071423,07055.108.22$33,047
Jan 20072922,54950.306.73$31,834
Dec 20061422,41656.656.92$24,759
Nov 20062782,08054.207.62$30,912
Oct 20062883,29154.906.01$35,603
Sep 20061423,37560.085.04$25,532
Aug 20062902,83568.717.34$40,735
Jul 20062793,46469.376.34$41,326
Jun 200603,24566.286.38$20,716
May 20062643,49166.016.42$39,856
Apr 20064373,18164.397.36$51,552
Mar 20061413,53556.707.08$33,033
Feb 20062873,31857.597.75$42,247
Jan 20062804,14560.598.93$53,994
Dec 20052704,18254.9413.42$70,937
Nov 20051433,54154.6910.59$45,314
Oct 200503,33958.3413.80$46,064
Sep 20052633,93061.4512.08$63,632
Aug 20052724,30161.519.80$58,867
Jul 20051414,41855.697.84$42,505
Jun 20052704,51152.337.38$47,425
May 200504,35045.226.65$28,933
Apr 200504,26249.207.36$31,370
Mar 20051253,08150.377.15$28,340
Feb 20052632,85245.226.31$29,894
Jan 200503,70243.166.32$23,405
Dec 20042704,42039.866.75$40,602
Nov 200404,08345.286.33$25,847
Oct 20042954,42749.706.52$43,504
Sep 20041453,65943.245.28$25,604
Aug 20042694,13242.375.55$34,333
Jul 20042784,14838.286.08$35,879
Jun 20042844,04336.106.43$36,261
May 20042734,13137.486.49$37,061
Apr 20042793,40734.475.86$29,577
Mar 20042814,52134.365.53$34,657
Feb 20041673,99832.455.51$27,447
Jan 20044404,47532.036.30$42,284
Dec 20032814,79130.266.30$38,694
Nov 20032994,53728.804.60$29,459
Oct 20032945,04828.174.76$32,309
Sep 20032895,08826.314.75$31,768
Aug 20034234,49829.765.13$35,662
Jul 20032895,56529.415.17$37,275
Jun 20032995,54628.565.98$41,721
May 20033065,89126.595.97$43,322
Apr 20033025,67726.675.41$38,751
Mar 20033075,89231.146.10$45,478
Feb 20033075,38033.487.93$52,920
Jan 20034665,90030.315.58$47,059
Dec 20023075,17426.914.85$33,375
Nov 20023015,78324.664.14$31,347
Oct 20023075,84326.464.23$32,834
Sep 20023145,88827.443.64$30,020
Aug 20022974,67625.963.16$22,506
Jul 20021514,57624.583.06$17,722
Jun 20022974,43723.733.34$21,860
May 20021474,60424.663.58$20,126
Apr 20022854,42323.653.51$22,275
Mar 20021454,67322.003.10$17,689
Feb 20023013,96218.222.38$14,897
Jan 20021553,95317.172.38$12,052
Dec 20011463,24316.932.36$10,140
Nov 20011464,59018.072.41$13,680
Oct 20011524,77219.782.53$15,074
Sep 20011521,93324.262.25$8,039
Aug 20013043,79024.873.05$19,132
Jul 20011503,43323.933.20$14,565
Jun 20013033,79724.563.82$21,962
May 20011474,89025.524.31$24,814
Apr 20011524,83624.685.34$29,553
Mar 20012915,03524.545.38$34,212
Feb 20012843,90427.755.77$30,396
Jan 20011465,00627.478.40$46,055
Dec 20002995,04726.889.12$54,078
Nov 20001554,89532.215.66$32,688
Oct 20002924,92231.235.15$34,445
Sep 20002925,03531.875.19$35,420
Aug 20001455,12829.644.54$27,583
Jul 20002784,92728.534.09$28,082
Jun 20001515,07029.304.40$26,718
May 20001485,08227.263.68$22,735
Apr 20002994,92024.513.12$22,659
Mar 20003034,94928.422.86$22,764
Feb 20001524,62727.622.73$16,814
Jan 20002963,71125.272.48$16,685
Dec 19991475,07224.282.42$15,862
Nov 19993054,93823.192.43$19,092
Oct 19991535,93120.982.80$19,839
Sep 19992995,88121.752.62$21,905
Aug 19991505,35619.262.88$18,291
Jul 19993015,19217.892.37$17,702
Jun 19992834,78415.942.36$15,811
May 19992404,56015.792.32$14,373
Apr 199904,05115.102.21$8,945
Mar 19991534,67012.471.84$10,493
Feb 19991455,8629.981.82$12,103
Jan 19993026,74310.381.90$15,946
Dec 19981516,7229.201.77$13,309
Nov 19982856,43810.892.19$17,175
Oct 19982756,43812.421.97$16,093
Sep 19981426,50012.592.08$15,325
Aug 19981457,87511.301.91$16,659
Jul 19983217,67211.742.24$20,933
Jun 19981547,58611.242.24$18,703
May 19981627,70112.622.21$19,035
Apr 19981618,46613.042.51$23,310
Mar 19983288,86912.802.31$24,681
Feb 19981656,64313.952.30$17,575
Jan 19983337,71414.702.15$21,517
Dec 19971938,34016.322.41$23,258
Nov 19971927,72018.193.09$27,334
Oct 19971928,24319.253.15$29,660
Sep 19973849,17917.742.95$33,935
Aug 19972107,90117.862.55$23,936
Jul 19972109,00717.582.25$23,930
Jun 19971899,68717.242.26$25,124
May 19974239,46518.972.31$29,874
Apr 19972148,24017.882.08$20,988
Mar 19972038,87218.951.94$21,051
Feb 19972087,90020.492.21$21,689
Jan 19974148,74323.483.54$40,668
Dec 19962158,76723.32$5,014
Nov 19962138,27821.97$4,680
Oct 199621211,93323.31$4,942
Sep 199620912,32022.22$4,644
Aug 199620813,42520.26$4,214
Jul 199621315,08219.55$4,164
Jun 199621214,25318.73$3,971
May 199642415,00419.43$8,238
Apr 199621415,81721.51$4,603
Mar 199621413,66619.38$4,147
Feb 199642514,58216.98$7,217
Jan 199621315,23317.07$3,636
Dec 199541015,50917.19$7,048
Nov 199521214,52316.00$3,392
Oct 199521315,56415.43$3,287
Sep 199521313,59816.18$3,446
Aug 199521017,20615.92$3,343
Jul 199521118,00615.24$3,216
Jun 199519417,64216.41$3,184
May 199542418,60717.56$7,445
Apr 199521317,19817.73$3,776
Mar 199520814,60116.44$3,420
Feb 199540816,63616.58$6,765
Jan 1995019,67615.92$0
Dec 199440821,63515.03$6,132
Nov 199441521,53015.90$6,599
Oct 1994023,73215.58$0
Sep 199438223,45915.29$5,841
Aug 199420521,71216.13$3,307
Jul 199421424,23817.56$3,758
Jun 199421224,88617.09$3,623
May 199442526,72015.88$6,749
Apr 199421626,82214.14$3,054
Mar 199442114,76512.46$5,246
Feb 199437924,38612.50$4,738
Jan 199439614,91512.66$5,013
Dec 199342915,61312.33$5,290
Nov 199321111,65514.49$3,057
Oct 199360312,59015.85$9,558
Sep 199340611,15415.03$6,102
Aug 199320212,48615.66$3,163
Jul 199340914,83015.46$6,323
Jun 199339418,12916.79$6,615
May 199345210,54017.68$7,991
Apr 19931,0606,78218.05$19,133
Mar 1993317118.14$5,750
Feb 19930117.90$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                   90 bbl  × $106.41 =     $9,577
Casinghead gas         0 Mcf  × $  3.05 =         $0

────────────────────────────────────────────────────
Month total                                   $9,577

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/66964 is the state's own key, not one this site invented.