MASTEN, F. O. "A"

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 3748District 8AField 53411001Hydrogen sulphide fieldOilCasinghead gasSaveExport
Value, all time
$1.7 M
Jan 1993 – May 2026
Value, last 12 filed months
$50 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 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
OilDisposition26,782 bbl$1,172,305
Casinghead gasProduction360,255 Mcf$556,765
Total$1,729,070

184,997 Mcf of this lease's gas, across 46 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 33.5280, -102.8855. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.6 miles.

33.52922, -102.88382 · 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
50.0%
3 of 6 wells
Median depth
4,972 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
466.7%
A plug date is filed
350.0%
BothOn the schedule and plugged. Neither fact cancels the other.
350.0%
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 4,958 and 4,992 ft, median 4,972 ft, over the 5 wells that filed a depth.

Completions filed
Mar 1993 – Apr 1993
2 of 6 wells; 4 filed none
Plug dates filed
Nov 1991 – Mar 2014
3 of 6 wells; 3 filed none

6 wells

42-0790193034,961 ftDec 1991Yes
42-079019324Yes
42-0790217214,972 ftNov 1991Yes
42-0790217524,958 ftMar 2014Yes
42-079326741 X4,992 ftApr 1993
42-079326633 X4,974 ftMar 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 (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 2026900106.413.05$9,577
Apr 202686098.932.87$8,508
Mar 20260089.753.15$0
Feb 202690063.503.75$5,715
Jan 20260059.138.00$0
Dec 202589056.664.41$5,043
Nov 20250058.593.93$0
Oct 202583059.383.30$4,929
Sep 202587062.743.08$5,458
Aug 20250063.933.01$0
Jul 202584066.743.32$5,606
Jun 202585066.483.13$5,651
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 20240069.052.20$0
Oct 20240071.372.28$0
Sep 202480069.612.36$5,569
Aug 202487075.632.06$6,580
Jul 202482079.932.15$6,554
Jun 202482078.082.63$6,403
May 20240078.812.20$0
Apr 202497084.451.66$8,192
Mar 202493080.301.55$7,468
Feb 20240076.091.78$0
Jan 202496073.023.30$7,010
Dec 202395071.262.61$6,770
Nov 202388077.892.81$6,854
Oct 20230085.443.09$0
Sep 202397089.042.74$8,637
Aug 202388080.522.67$7,086
Jul 20230074.852.64$0
Jun 202379068.962.26$5,448
May 20230070.622.23$0
Apr 202385078.122.24$6,640
Mar 202387072.852.39$6,338
Feb 202358075.112.47$4,356
Jan 20230076.533.39$0
Dec 2022668976.415.73$5,553
Nov 2022668385.005.65$6,079
Oct 202207487.185.86$434
Sep 2022658884.888.16$6,236
Aug 202207894.529.13$712
Jul 20226369101.587.54$6,920
Jun 20226577115.097.98$8,095
May 2022061109.378.43$514
Apr 20226442104.226.84$6,957
Mar 20226725108.885.08$7,422
Feb 202202291.054.86$107
Jan 2022641681.844.54$5,310
Dec 202101771.323.90$66
Nov 2021641277.435.24$5,018
Oct 2021641679.795.71$5,198
Sep 202101469.865.35$75
Aug 202160966.024.22$3,999
Jul 2021651870.783.98$4,672
Jun 2021611369.493.38$4,283
May 202101963.483.02$57
Apr 2021661760.362.76$4,031
Mar 2021652061.302.72$4,039
Feb 202101357.805.55$72
Jan 2021662050.412.81$3,383
Dec 202001544.642.68$40
Nov 2020631538.772.71$2,483
Oct 2020641736.972.48$2,408
Sep 202067337.091.99$2,491
Aug 202064139.982.39$2,561
Jul 20200338.371.83$5
Jun 20200534.901.69$8
May 20200016.921.81$0
Apr 202065014.751.80$959
Mar 202003130.341.86$58
Feb 2020383349.881.98$1,961
Jan 2020373757.252.09$2,196
Dec 2019355259.012.30$2,185
Nov 201905455.302.75$149
Oct 2019496353.472.42$2,772
Sep 2019837255.052.66$4,760
Aug 201908253.112.30$189
Jul 2019815256.272.46$4,686
Jun 2019844352.782.49$4,541
May 201904758.482.74$129
Apr 2019905562.632.75$5,788
Mar 201906056.803.06$184
Feb 201905250.852.79$145
Jan 201905446.033.23$174
Dec 201803646.594.19$151
Nov 201803352.934.24$140
Oct 201803661.443.40$122
Sep 20180459.543.11$12
Aug 2018891359.403.07$5,326
Jul 2018803865.142.93$5,323
Jun 2018492160.183.08$3,013
May 2018481965.382.90$3,193
Apr 2018492663.842.90$3,204
Mar 2018477861.222.79$3,095
Feb 2018486961.782.77$3,156
Jan 2018477662.874.01$3,260
Dec 2017498157.272.92$3,043
Nov 201709155.423.12$284
Oct 2017479649.292.98$2,603
Sep 2017499347.523.09$2,616
Aug 2017478245.373.00$2,379
Jul 2017489443.873.09$2,396
Jun 2017479442.493.09$2,287
May 20174510145.373.26$2,371
Apr 2017448747.933.21$2,388
Mar 201709446.772.98$280
Feb 2017488050.452.95$2,658
Jan 20171186449.413.42$6,049
Dec 2016012348.763.72$458
Nov 20168712242.492.64$4,019
Oct 2016011346.193.09$349
Sep 201610111841.553.10$4,562
Aug 201610112041.442.92$4,536
Jul 201610113441.622.92$4,595
Jun 20161026645.352.69$4,803
May 20168612442.521.99$3,904
Apr 2016013536.561.99$269
Mar 20161012533.011.79$3,379
Feb 2016842426.472.06$2,273
Jan 201608627.352.36$203
Dec 2015014832.362.00$296
Nov 2015015238.792.17$329
Oct 20158246643.552.43$4,702
Sep 2015016342.992.76$450
Aug 201501640.162.87$46
Jul 20151661848.152.95$8,046
Jun 201501956.152.88$55
May 2015841,84855.212.96$10,099
Apr 2015841,27649.822.71$7,638
Mar 201516995242.892.93$10,042
Feb 2015841,11844.662.98$7,079
Jan 20158157443.433.10$5,298
Dec 2014761,28754.693.59$8,779
Nov 2014741,90470.464.25$13,310
Oct 20141481,89578.303.90$18,981
Sep 201401,29986.164.05$5,255
Aug 201415051789.394.04$15,495
Jul 20147448996.564.18$9,189
Jun 20147252998.164.74$9,573
May 20146837294.734.73$8,200
Apr 20146653495.944.81$8,900
Mar 20145950995.895.06$8,231
Feb 20145643097.406.19$8,117
Jan 20145552890.404.86$7,538
Dec 201311246291.824.35$12,296
Nov 201357088.853.74$5,064
Oct 201356097.423.78$5,456
Sep 20135974104.113.72$6,418
Aug 201363513104.253.52$8,375
Jul 20130491102.523.72$1,825
Jun 20136343294.403.93$7,646
May 20136347494.834.15$7,941
Apr 20136449393.964.28$8,125
Mar 20135624093.623.91$6,182
Feb 20135740491.233.42$6,582
Jan 201311648491.603.42$12,281
Dec 201211751586.773.42$11,913
Nov 2012051286.953.62$1,856
Oct 201211452489.383.40$11,971
Sep 20125654694.672.92$6,895
Aug 20125656492.662.91$6,829
Jul 20124362385.133.02$5,543
Jun 20123651179.822.52$4,161
May 201210357791.612.49$10,872
Apr 20120526101.652.00$1,050
Mar 201259543105.052.22$7,405
Feb 20120492101.102.57$1,265
Jan 20125749898.092.73$6,953
Dec 20115348496.873.24$6,702
Nov 20113151095.723.31$4,656
Oct 20113045484.983.65$4,206
Sep 20113233883.623.99$4,023
Aug 20113845483.404.15$5,053
Jul 20113835294.144.52$5,167
Jun 20113838192.904.64$5,298
May 20113842598.134.40$5,601
Apr 201135393105.964.33$5,412
Mar 20114230996.364.06$5,301
Feb 2011030885.644.18$1,287
Jan 20114140286.504.59$5,391
Dec 20104140285.734.35$5,263
Nov 20105037180.843.80$5,450
Oct 2010044178.103.51$1,547
Sep 20105530372.633.98$5,200
Aug 2010721073.684.42$5,349
Jul 201002072.554.74$95
Jun 20101271670.364.91$9,014
May 201001671.124.24$68
Apr 201002381.694.12$95
Mar 201002478.394.39$105
Feb 2010692573.585.44$5,213
Jan 201003174.365.96$185
Dec 2009743171.445.48$5,457
Nov 200903274.593.75$120
Oct 20091443172.544.11$10,573
Sep 2009393265.543.06$2,654
Aug 2009384067.423.22$2,691
Jul 200904061.133.46$139
Jun 20090566.163.90$19
May 200938754.743.93$2,108
Apr 200938746.773.59$1,802
Mar 200941642.144.06$1,752
Feb 200949332.814.63$1,622
Jan 200950535.865.37$1,820
Dec 200850737.105.98$1,897
Nov 2008100755.496.86$5,597
Oct 200846775.246.92$3,509
Sep 200805101.767.88$39
Aug 2008448114.228.48$5,094
Jul 2008858131.0811.39$11,233
Jun 200807131.3313.03$91
May 2008398123.1711.57$4,896
Apr 2008378110.3110.45$4,165
Mar 2008378101.909.66$3,848
Feb 200838792.538.77$3,578
Jan 200876890.388.21$6,935
Dec 200738888.337.30$3,415
Nov 200738891.677.29$3,542
Oct 200776882.856.92$6,352
Sep 200734875.846.24$2,629
Aug 200772669.066.39$5,011
Jul 200768870.906.39$4,872
Jun 200765762.007.55$4,083
May 200729658.747.85$1,751
Apr 200758559.617.81$3,496
Mar 200729656.927.30$1,694
Feb 200728755.108.22$1,600
Jan 200758650.306.73$2,958
Dec 200629556.656.92$1,677
Nov 200656554.207.62$3,073
Oct 200658754.906.01$3,226
Sep 200629860.085.04$1,783
Aug 200657668.717.34$3,961
Jul 200651869.376.34$3,589
Jun 200601266.286.38$77
May 2006481466.016.42$3,258
Apr 2006801264.397.36$5,240
Mar 2006251456.707.08$1,517
Feb 2006561257.597.75$3,318
Jan 2006551660.598.93$3,475
Dec 2005541654.9413.42$3,181
Nov 2005291454.6910.59$1,734
Oct 200501258.3413.80$166
Sep 2005561561.4512.08$3,622
Aug 2005541761.519.80$3,488
Jul 2005281755.697.84$1,693
Jun 2005541752.337.38$2,951
May 200501745.226.65$113
Apr 200501649.207.36$118
Mar 2005221950.377.15$1,244
Feb 2005481745.226.31$2,278
Jan 200502243.166.32$139
Dec 2004482739.866.75$2,096
Nov 200402545.286.33$158
Oct 2004542749.706.52$2,860
Sep 2004292243.245.28$1,370
Aug 20045466142.375.55$5,957
Jul 20045866438.286.08$6,260
Jun 20046453836.106.43$5,771
May 20046055037.486.49$5,821
Apr 200462034.475.86$2,137
Mar 200462034.365.53$2,130
Feb 200424032.455.51$779
Jan 200462032.036.30$1,986
Dec 200356030.266.30$1,695
Nov 200360028.804.60$1,728
Oct 200359028.174.76$1,662
Sep 200357026.314.75$1,500
Aug 200391029.765.13$2,708
Jul 200360029.415.17$1,765
Jun 200347028.565.98$1,342
May 200349026.595.97$1,303
Apr 200345026.675.41$1,200
Mar 200344031.146.10$1,370
Feb 200342033.487.93$1,406
Jan 200365030.315.58$1,970
Dec 200243026.914.85$1,157
Nov 200243024.664.14$1,060
Oct 200243026.464.23$1,138
Sep 200243027.443.64$1,180
Aug 20022241,55825.963.16$10,745
Jul 20021131,52624.583.06$7,450
Jun 20022241,47923.733.34$10,253
May 20021111,53424.663.58$8,235
Apr 20022151,47523.653.51$10,265
Mar 20021101,55722.003.10$7,251
Feb 20022271,32018.222.38$7,272
Jan 20021171,31817.172.38$5,140
Dec 20011101,08116.932.36$4,418
Nov 20011101,53018.072.41$5,668
Oct 20011151,59019.782.53$6,296
Sep 200111464424.262.25$4,215
Aug 20012301,26424.873.05$9,579
Jul 20011141,14423.933.20$6,385
Jun 20012281,26624.563.82$10,441
May 20011101,63025.524.31$9,828
Apr 20011141,61224.685.34$11,414
Mar 20012201,67824.545.38$14,420
Feb 20012151,30227.755.77$13,475
Jan 20011101,66927.478.40$17,039
Dec 20002251,68326.889.12$21,401
Nov 20001161,63232.215.66$12,970
Oct 20002211,64031.235.15$15,340
Sep 20002201,67931.875.19$15,720
Aug 20001091,71029.644.54$10,995
Jul 20002101,64228.534.09$12,707
Jun 20001131,69029.304.40$10,742
May 20001121,69427.263.68$9,287
Apr 20002261,64024.513.12$10,650
Mar 20002281,65028.422.86$11,198
Feb 20001151,54227.622.73$7,381
Jan 20002232,79925.272.48$12,578
Dec 19991111,69124.282.42$6,794
Nov 19992301,64623.192.43$9,340
Oct 19991161,97720.982.80$7,977
Sep 19992261,96021.752.62$10,048
Aug 19991131,78619.262.88$7,312
Jul 19992271,73117.892.37$8,168
Jun 19992141,59515.942.36$7,179
May 19991811,52015.792.32$6,386
Apr 199901,35115.102.21$2,983
Mar 19991151,55612.471.84$4,294
Feb 19991101,9549.981.82$4,650
Jan 19992282,24710.381.90$6,636
Dec 19981142,2419.201.77$5,023
Nov 19982152,07910.892.19$6,885
Oct 19982082,14612.421.97$6,809
Sep 19981072,16712.592.08$5,860
Aug 19981102,62511.301.91$6,250
Jul 19981812,83811.742.24$8,474
Jun 1998872,80611.242.24$7,256
May 1998912,84812.622.21$7,432
Apr 1998913,13113.042.51$9,031
Mar 19981843,28012.802.31$9,930
Feb 1998932,45713.952.30$6,946
Jan 19981872,85314.702.15$8,897
Dec 1997713,08516.322.41$8,597
Nov 1997712,85618.193.09$10,112
Oct 1997713,04919.253.15$10,971
Sep 19971423,39517.742.95$12,551
Aug 1997522,92217.862.55$8,394
Jul 1997533,33217.582.25$8,419
Jun 1997702,42217.242.26$6,674
May 19971062,36618.972.31$7,473
Apr 1997542,06017.882.08$5,256
Mar 1997512,21818.951.94$5,267
Feb 1997521,97520.492.21$5,422
Jan 19971032,18623.483.54$10,156
Dec 1996542,19223.32$1,259
Nov 1996532,06921.97$1,164
Oct 1996532,98323.31$1,235
Sep 1996523,08022.22$1,155
Aug 1996523,35620.26$1,054
Jul 1996533,77119.55$1,036
Jun 1996533,56318.73$993
May 19961063,75119.43$2,060
Apr 1996543,95421.51$1,162
Mar 1996543,41719.38$1,047
Feb 19961063,64516.98$1,800
Jan 1996533,80817.07$905
Dec 19951023,87717.19$1,753
Nov 1995533,63116.00$848
Oct 1995533,89115.43$818
Sep 1995533,40016.18$858
Aug 1995524,30115.92$828
Jul 1995534,50115.24$808
Jun 1995484,41016.41$788
May 19951064,65217.56$1,861
Apr 1995534,29917.73$940
Mar 1995523,65016.44$855
Feb 19951024,15916.58$1,691
Jan 199504,91915.92$0
Dec 19941025,40915.03$1,533
Nov 19941045,38215.90$1,654
Oct 199405,93315.58$0
Sep 1994955,86515.29$1,453
Aug 1994515,42816.13$823
Jul 1994536,05917.56$931
Jun 1994536,22217.09$906
May 19941066,68015.88$1,683
Apr 1994546,70614.14$764
Mar 19941053,69112.46$1,308
Feb 1994956,16912.50$1,188
Jan 1994993,72912.66$1,253
Dec 19931073,90312.33$1,319
Nov 1993532,91414.49$768
Oct 19931513,14715.85$2,393
Sep 19931022,78915.03$1,533
Aug 1993513,12115.66$799
Jul 19931023,70815.46$1,577
Jun 1993994,53216.79$1,662
May 19931132,63517.68$1,998
Apr 19931181,69518.05$2,130
Mar 19930118.14$0
Feb 19930017.90$0
Jan 19930016.93$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                   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/3748 is the state's own key, not one this site invented.