MULLIN, W. W.

Operated by DRY FORK PRODUCTION CO., LLC (P-5 229319) in the WOLF FLAT (CISCO) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 66077District 8AField 98395250Hydrogen sulphide fieldOilCasinghead gasSaveExport
Value, all time
$11.9 M
Jan 1993 – May 2026
Value, last 12 filed months
$11 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 1 leases and 7 wells, and the rule below applies to all of them.

Discovered
1987-10-24
as the register files it
Field class
Oil
the register's own label
Between wells
1,320 ft
minimum
From a lease line
660 ft
minimum

A drilling unit in this field needs at least 80 acres. The field rule took effect on 1988-07-01.

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
OilDisposition469,346 bbl$11,892,562
Casinghead gasProduction37,120 Mcf$51,539
Total$11,944,101

20,542 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 (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 34.3001, -100.8765. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.8 miles.

34.30036, -100.87740 · 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
57.1%
4 of 7 wells
With a plug date
57.1%
4 of 7 wells
Median depth
5,800 ft
7 wells filed one
Completion to plug
4.3 years
median over 3 wells

What the state filed about each well

On the RRC proration schedule
457.1%
A plug date is filed
457.1%
BothOn the schedule and plugged. Neither fact cancels the other.
457.1%
NeitherNo plug date, and not on the schedule.
342.9%

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 5,532 and 8,820 ft, median 5,800 ft, over the 7 wells that filed a depth.

Completions filed
Oct 1987 – Jul 1994
6 of 7 wells; 1 filed none
Plug dates filed
Jul 1995 – Nov 2023
4 of 7 wells; 3 filed none

Last completion to plug: a median of 4.3 years across the 3 wells that filed both dates, with the middle half between 3.0 years and 14.5 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

7 wells

42-3453024525,580 ftNov 2023Yes
42-3453027175,650 ftJul 1994Apr 1996Yes
42-3453025558,820 ftJan 1994
42-3453026165,532 ftApr 1991Jul 1995Yes
42-345302494D5,800 ftOct 1988
42-3453024835,800 ftJul 1988Mar 2013Yes
42-3453024416,000 ftOct 1987

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 202600106.413.05$0
Apr 20260098.932.87$0
Mar 20260089.753.15$0
Feb 20260063.503.75$0
Jan 20260059.138.00$0
Dec 20250056.664.41$0
Nov 20250058.593.93$0
Oct 20250059.383.30$0
Sep 20250062.743.08$0
Aug 20250063.933.01$0
Jul 20250066.743.32$0
Jun 2025171066.483.13$11,368
May 2025187060.553.23$11,323
Apr 2025189062.363.54$11,786
Mar 2025188067.704.27$12,728
Feb 20250070.884.34$0
Jan 202573074.324.28$5,425
Dec 2024164068.993.12$11,314
Nov 2024171069.052.20$11,808
Oct 2024365071.372.28$26,050
Sep 20240069.612.36$0
Aug 2024177075.632.06$13,387
Jul 20240079.932.15$0
Jun 2024175078.082.63$13,664
May 2024171078.812.20$13,477
Apr 2024180084.451.66$15,201
Mar 2024176080.301.55$14,133
Feb 2024379076.091.78$28,838
Jan 2024177073.023.30$12,925
Dec 2023171071.262.61$12,185
Nov 2023337077.892.81$26,249
Oct 2023334085.443.09$28,537
Sep 2023164089.042.74$14,603
Aug 2023167080.522.67$13,447
Jul 20230074.852.64$0
Jun 2023160068.962.26$11,034
May 2023306070.622.23$21,610
Apr 2023153078.122.24$11,952
Mar 2023134072.852.39$9,762
Feb 2023175075.112.47$13,144
Jan 2023337076.533.39$25,791
Dec 2022409076.415.73$31,252
Nov 2022174085.005.65$14,790
Oct 2022529087.185.86$46,118
Sep 2022178084.888.16$15,109
Aug 2022347094.529.13$32,798
Jul 20223530101.587.54$35,858
Jun 20222720115.097.98$31,304
May 20223210109.378.43$35,108
Apr 20223390104.226.84$35,331
Mar 20223400108.885.08$37,019
Feb 2022518091.054.86$47,164
Jan 2022507081.844.54$41,493
Dec 20210071.323.90$0
Nov 2021170077.435.24$13,163
Oct 2021337079.795.71$26,889
Sep 2021324069.865.35$22,635
Aug 2021335066.024.22$22,117
Jul 2021332070.783.98$23,499
Jun 2021334069.493.38$23,210
May 2021497063.483.02$31,550
Apr 2021502060.362.76$30,301
Mar 2021333061.302.72$20,413
Feb 2021332057.805.55$19,190
Jan 2021328050.412.81$16,534
Dec 2020520044.642.68$23,213
Nov 2020511038.772.71$19,811
Oct 2020665036.972.48$24,585
Sep 2020496037.091.99$18,397
Aug 2020504039.982.39$20,150
Jul 2020722038.371.83$27,703
Jun 2020541034.901.69$18,881
May 20201,069016.921.81$18,087
Apr 2020175014.751.80$2,581
Mar 20200030.341.86$0
Feb 2020344049.881.98$17,159
Jan 20200057.252.09$0
Dec 20190059.012.30$0
Nov 20190055.302.75$0
Oct 20190053.472.42$0
Sep 20190055.052.66$0
Aug 20190053.112.30$0
Jul 20190056.272.46$0
Jun 20190052.782.49$0
May 20190058.482.74$0
Apr 20190062.632.75$0
Mar 20190056.803.06$0
Feb 20190050.852.79$0
Jan 20190046.033.23$0
Dec 20180046.594.19$0
Nov 20180052.934.24$0
Oct 20180061.443.40$0
Sep 20180059.543.11$0
Aug 20180059.403.07$0
Jul 20180065.142.93$0
Jun 20180060.183.08$0
May 20180065.382.90$0
Apr 20180063.842.90$0
Mar 20180061.222.79$0
Feb 20180061.782.77$0
Jan 20180062.874.01$0
Dec 20170057.272.92$0
Nov 20170055.423.12$0
Oct 20170049.292.98$0
Sep 20170047.523.09$0
Aug 20170045.373.00$0
Jul 20170043.873.09$0
Jun 20170042.493.09$0
May 20170045.373.26$0
Apr 20170047.933.21$0
Mar 20170046.772.98$0
Feb 20170050.452.95$0
Jan 20170049.413.42$0
Dec 20160048.763.72$0
Nov 20160042.492.64$0
Oct 20160046.193.09$0
Sep 20160041.553.10$0
Aug 20160041.442.92$0
Jul 20160041.622.92$0
Jun 20160045.352.69$0
May 20160042.521.99$0
Apr 20160036.561.99$0
Mar 20160033.011.79$0
Feb 20160026.472.06$0
Jan 20160027.352.36$0
Dec 20150032.362.00$0
Nov 20150038.792.17$0
Oct 20150043.552.43$0
Sep 20150042.992.76$0
Aug 20150040.162.87$0
Jul 20150048.152.95$0
Jun 20150056.152.88$0
May 20150055.212.96$0
Apr 20150049.822.71$0
Mar 20150042.892.93$0
Feb 20150044.662.98$0
Jan 20150043.433.10$0
Dec 20140054.693.59$0
Nov 20140070.464.25$0
Oct 20140078.303.90$0
Sep 20140086.164.05$0
Aug 2014183089.394.04$16,358
Jul 2014173096.564.18$16,705
Jun 20140098.164.74$0
May 20140094.734.73$0
Apr 20140095.944.81$0
Mar 20140095.895.06$0
Feb 20140097.406.19$0
Jan 20140090.404.86$0
Dec 20130091.824.35$0
Nov 20130088.853.74$0
Oct 2013166097.423.78$16,172
Sep 20135360104.113.72$55,803
Aug 20133570104.253.52$37,217
Jul 201300102.523.72$0
Jun 20130094.403.93$0
May 20130094.834.15$0
Apr 20130093.964.28$0
Mar 20130093.623.91$0
Feb 20130091.233.42$0
Jan 2013190091.603.42$17,404
Dec 2012368086.773.42$31,931
Nov 2012370086.953.62$32,172
Oct 2012372089.383.40$33,249
Sep 2012369094.672.92$34,933
Aug 2012357092.662.91$33,080
Jul 2012350085.133.02$29,796
Jun 2012550079.822.52$43,901
May 2012368091.612.49$33,712
Apr 20121800101.652.00$18,297
Mar 20123740105.052.22$39,289
Feb 20123690101.102.57$37,306
Jan 2012372098.092.73$36,489
Dec 2011370096.873.24$35,842
Nov 2011185095.723.31$17,708
Oct 2011549084.983.65$46,654
Sep 20110083.623.99$0
Aug 2011549083.404.15$45,787
Jul 2011364094.144.52$34,267
Jun 2011533092.904.64$49,516
May 2011363098.134.40$35,621
Apr 20117320105.964.33$77,563
Mar 2011553096.364.06$53,287
Feb 2011548085.644.18$46,931
Jan 2011929086.504.59$80,359
Dec 2010745085.734.35$63,869
Nov 2010928080.843.80$75,020
Oct 2010735078.103.51$57,404
Sep 2010550072.633.98$39,947
Aug 2010715073.684.42$52,681
Jul 20101,091072.554.74$79,152
Jun 2010708070.364.91$49,815
May 2010539071.124.24$38,334
Apr 2010721081.694.12$58,898
Mar 2010554078.394.39$43,428
Feb 2010183073.585.44$13,465
Jan 2010368074.365.96$27,364
Dec 2009363071.445.48$25,933
Nov 2009367074.593.75$27,375
Oct 2009366072.544.11$26,550
Sep 2009550065.543.06$36,047
Aug 2009363067.423.22$24,473
Jul 2009931061.133.46$56,912
Jun 2009369066.163.90$24,413
May 2009374054.743.93$20,473
Apr 2009745046.773.59$34,844
Mar 2009750042.144.06$31,605
Feb 20090032.814.63$0
Jan 20090035.865.37$0
Dec 2008189037.105.98$7,012
Nov 2008190055.496.86$10,543
Oct 2008375075.246.92$28,215
Sep 20081870101.767.88$19,029
Aug 20083640114.228.48$41,576
Jul 20083770131.0811.39$49,417
Jun 20081730131.3313.03$22,720
May 20083750123.1711.57$46,189
Apr 20083690110.3110.45$40,704
Mar 20081870101.909.66$19,055
Feb 2008555092.538.77$51,354
Jan 2008178090.388.21$16,088
Dec 2007375088.337.30$33,124
Nov 2007364091.677.29$33,368
Oct 2007178082.856.92$14,747
Sep 2007350075.846.24$26,544
Aug 2007358069.066.39$24,723
Jul 2007358070.906.39$25,382
Jun 2007178062.007.55$11,036
May 2007530058.747.85$31,132
Apr 2007356059.617.81$21,221
Mar 2007342056.927.30$19,467
Feb 2007359055.108.22$19,781
Jan 2007363050.306.73$18,259
Dec 2006357056.656.92$20,224
Nov 2006360054.207.62$19,512
Oct 2006346054.906.01$18,995
Sep 2006880060.085.04$52,870
Aug 2006343068.717.34$23,568
Jul 2006358069.376.34$24,834
Jun 2006177066.286.38$11,732
May 2006535066.016.42$35,315
Apr 2006522064.397.36$33,612
Mar 2006544056.707.08$30,845
Feb 2006183057.597.75$10,539
Jan 2006714060.598.93$43,261
Dec 2005525054.9413.42$28,844
Nov 2005179054.6910.59$9,790
Oct 2005533058.3413.80$31,095
Sep 2005496061.4512.08$30,479
Aug 2005345061.519.80$21,221
Jul 2005508055.697.84$28,291
Jun 2005499052.337.38$26,113
May 2005518045.226.65$23,424
Apr 2005692049.207.36$34,046
Mar 2005355050.377.15$17,881
Feb 2005704045.226.31$31,835
Jan 2005521043.166.32$22,486
Dec 2004526039.866.75$20,966
Nov 2004521045.286.33$23,591
Oct 2004634049.706.52$31,510
Sep 2004693043.245.28$29,965
Aug 2004861042.375.55$36,481
Jul 2004887038.286.08$33,954
Jun 2004887036.106.43$32,021
May 2004883037.486.49$33,095
Apr 20041,036034.475.86$35,711
Mar 2004705034.365.53$24,224
Feb 20041,062032.455.51$34,462
Jan 2004867032.036.30$27,770
Dec 2003852030.266.30$25,782
Nov 2003871028.804.60$25,085
Oct 20031,058028.174.76$29,804
Sep 20031,021026.314.75$26,863
Aug 20031,033029.765.13$30,742
Jul 2003870029.415.17$25,587
Jun 20031,038028.565.98$29,645
May 20031,051026.595.97$27,946
Apr 2003882026.675.41$23,523
Mar 20031,064031.146.10$33,133
Feb 20031,058033.487.93$35,422
Jan 20031,029030.315.58$31,189
Dec 20021,193026.914.85$32,104
Nov 2002883024.664.14$21,775
Oct 20021,032026.464.23$27,307
Sep 20021,045027.443.64$28,675
Aug 20021,21824825.963.16$32,404
Jul 20021,02324824.583.06$25,905
Jun 20021,05924823.733.34$25,958
May 20021,02424824.663.58$26,141
Apr 20021,38824023.653.51$33,669
Mar 200287924822.003.10$20,107
Feb 20021,19622418.222.38$22,323
Jan 20021,22424817.172.38$21,605
Dec 20011,01824816.932.36$17,821
Nov 20011,04224018.072.41$19,406
Oct 20011,02924819.782.53$20,981
Sep 20011,01224024.262.25$25,091
Aug 20011,03424824.873.05$26,473
Jul 20011,23324823.933.20$30,299
Jun 20011,39124024.563.82$35,081
May 20011,04624825.524.31$27,762
Apr 20011,39324824.685.34$35,702
Mar 20011,35824824.545.38$34,659
Feb 20011,05024827.755.77$30,568
Jan 20011,42324827.478.40$41,173
Dec 20001,22524826.889.12$35,190
Nov 20001,23824032.215.66$41,234
Oct 20001,41324831.235.15$45,404
Sep 20001,22624031.875.19$40,317
Aug 20001,54124829.644.54$46,801
Jul 20001,40024828.534.09$40,956
Jun 20001,41124029.304.40$42,398
May 20001,26424827.263.68$35,369
Apr 20001,96924024.513.12$49,008
Mar 20001,42624828.422.86$41,236
Feb 20001,41022427.622.73$39,555
Jan 20001,98924825.272.48$50,877
Dec 19991,45024824.282.42$35,807
Nov 199990724023.192.43$21,617
Oct 19991,43324820.982.80$30,760
Sep 19991,81224021.752.62$40,040
Aug 19991,69824219.262.88$33,399
Jul 19991,72624817.892.37$31,466
Jun 19991,52924015.942.36$24,939
May 19991,68824815.792.32$27,229
Apr 19992,05524015.102.21$31,560
Mar 19992,24624812.471.84$28,464
Feb 19991,6032249.981.82$16,405
Jan 19992,28624810.381.90$24,200
Dec 19981,8782489.201.77$17,717
Nov 19982,78124010.892.19$30,810
Oct 19982,00124812.421.97$25,341
Sep 19982,20324012.592.08$28,236
Aug 19982,76424811.301.91$31,706
Jul 19982,23624811.742.24$26,805
Jun 19982,95524011.242.24$33,751
May 19982,59924812.622.21$33,347
Apr 19982,80124013.042.51$37,126
Mar 19982,26724812.802.31$29,590
Feb 19982,61822413.952.30$37,036
Jan 19982,62424814.702.15$39,107
Dec 19972,44124816.322.41$40,435
Nov 19972,95824018.193.09$54,547
Oct 19972,76624819.253.15$54,027
Sep 19973,27224017.742.95$58,754
Aug 19972,77724817.862.55$50,231
Jul 19973,47624817.582.25$61,665
Jun 19973,61924017.242.26$62,933
May 19973,09724818.972.31$59,323
Apr 19973,09524017.882.08$55,838
Mar 19972,91824818.951.94$55,777
Feb 19973,21122420.492.21$66,288
Jan 19972,38824823.483.54$56,948
Dec 19962,88124823.32$67,185
Nov 19962,73924021.97$60,176
Oct 19962,89224823.31$67,413
Sep 19962,71324022.22$60,283
Aug 19963,62224820.26$73,382
Jul 19963,30424819.55$64,593
Jun 19962,92124018.73$54,710
May 19963,48424819.43$67,694
Apr 19963,73824021.51$80,404
Mar 19962,98624819.38$57,869
Feb 19963,62623216.98$61,569
Jan 19964,13324817.07$70,550
Dec 19953,83524817.19$65,924
Nov 19953,93524016.00$62,960
Oct 19954,28624815.43$66,133
Sep 19954,08024016.18$66,014
Aug 19954,56824815.92$72,723
Jul 19955,48224815.24$83,546
Jun 19953,75824016.41$61,669
May 19954,87524817.56$85,605
Apr 19954,41324017.73$78,242
Mar 19955,06150616.44$83,203
Feb 19955,36954616.58$89,018
Jan 19955,53949315.92$88,181
Dec 19945,13052115.03$77,104
Nov 19945,44956115.90$86,639
Oct 19945,31960215.58$82,870
Sep 19946,55967215.29$100,287
Aug 19946,35867016.13$102,555
Jul 19947,22075817.56$126,783
Jun 19946,12663417.09$104,693
May 19947,25269515.88$115,162
Apr 19946,70469414.14$94,795
Mar 19947,75476012.46$96,615
Feb 19946,55267212.50$81,900
Jan 19947,61075512.66$96,343
Dec 19939,58196212.33$118,134
Nov 19938,81095014.49$127,657
Oct 19936,40164815.85$101,456
Sep 19936,51664815.03$97,935
Aug 19935,73157115.66$89,747
Jul 19936,22464615.46$96,223
Jun 19936,25862816.79$105,072
May 19937,159517.68$126,571
Apr 19937,47274118.05$134,870
Mar 19938,5312418.14$154,752
Feb 199302417.90$0
Jan 19939,5612816.93$161,868

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.

Jun 2025 — as filed, then multipliedworked
Oil                  171 bbl  × $ 66.48 =    $11,368
Casinghead gas         0 Mcf  × $  3.13 =         $0

────────────────────────────────────────────────────
Month total                                  $11,368

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/66077 is the state's own key, not one this site invented.