PEN BRANCH (UPPER STRAWN) UNIT

Operated by MIOCENE OIL & GAS, LTD. (P-5 570315) in the PEN BRANCH (U. STRAWN) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 66110District 8AField 70392800OilCasinghead gasSaveExport
Value, all time
$3.2 M
Jan 1993 – May 2026
Value, last 12 filed months
$0
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 4 leases and 27 wells, and the rule below applies to all of them.

Discovered
1985-09-09
as the register files it
Field class
Oil
the register's own label
Between wells
no field rule filed
From a lease line
no field rule filed

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
OilDisposition114,885 bbl$3,166,863
Casinghead gasProduction7,653 Mcf$4,086
Total$3,170,950

5,946 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 (14)

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 33.4100, -100.1889. A lease has no coordinate of its own — that point is the mean of its wells, and they span 1.0 miles.

33.40962, -100.18856 · 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
100.0%
14 of 14 wells
With a plug date
100.0%
14 of 14 wells
Median depth
6,049 ft
14 wells filed one
Completion to plug
29.9 years
median over 14 wells

What the state filed about each well

On the RRC proration schedule
14100.0%
A plug date is filed
14100.0%
BothOn the schedule and plugged. Neither fact cancels the other.
14100.0%
NeitherNo plug date, and not on the schedule.
00.0%

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

Total depth in feet, 14 of 14 wells. Median 6,049 ft, with the middle half between 5,505 and 6,106 ft; the shallowest is 5,330 ft and the deepest 6,698 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, 14 of 14 wells, Sep 1985 – Nov 1990. This is the LAST completion filed on each wellbore, not the first — a well recompleted in 2019 counts once, in the 2010s.

Completions filed
Sep 1985 – Nov 1990
14 of 14 wells
Plug dates filed
Apr 1997 – Feb 2019
14 of 14 wells

Last completion to plug: a median of 29.9 years across the 14 wells that filed both dates, with the middle half between 28.3 years and 30.9 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

14 wells

42-269316685035,400 ftNov 1990Sep 2016Yes
42-269315303016,108 ftNov 1990Feb 2019Yes
42-26931663W 66,099 ftJan 1988Sep 2016Yes
42-269317578WS6,698 ftJan 1988Jan 2019Yes
42-26931677W 75,465 ftMar 1987Sep 2016Yes
42-269316691055,520 ftJan 1987Feb 2019Yes
42-269316565025,330 ftDec 1986Sep 2016Yes
42-269316314055,500 ftSep 1986Sep 2016Yes
42-269316234046,117 ftAug 1986Sep 2016Yes
42-269315762026,060 ftMar 1986Sep 2016Yes
42-269315661045,600 ftFeb 1986Feb 2019Yes
42-26931554W 36,118 ftJan 1986Apr 1997Yes
42-269315071026,037 ftNov 1985Mar 2005Yes
42-269314881016,100 ftSep 1985Sep 2016Yes

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 20250066.483.13$0
May 20250060.553.23$0
Apr 20250062.363.54$0
Mar 20250067.704.27$0
Feb 20250070.884.34$0
Jan 20250074.324.28$0
Dec 20240068.993.12$0
Nov 20240069.052.20$0
Oct 20240071.372.28$0
Sep 20240069.612.36$0
Aug 20240075.632.06$0
Jul 20240079.932.15$0
Jun 20240078.082.63$0
May 20240078.812.20$0
Apr 20240084.451.66$0
Mar 20240080.301.55$0
Feb 20240076.091.78$0
Jan 20240073.023.30$0
Dec 20230071.262.61$0
Nov 20230077.892.81$0
Oct 20230085.443.09$0
Sep 20230089.042.74$0
Aug 20230080.522.67$0
Jul 20230074.852.64$0
Jun 20230068.962.26$0
May 20230070.622.23$0
Apr 20230078.122.24$0
Mar 20230072.852.39$0
Feb 20230075.112.47$0
Jan 20230076.533.39$0
Dec 20220076.415.73$0
Nov 20220085.005.65$0
Oct 20220087.185.86$0
Sep 20220084.888.16$0
Aug 20220094.529.13$0
Jul 202200101.587.54$0
Jun 202200115.097.98$0
May 202200109.378.43$0
Apr 202200104.226.84$0
Mar 202200108.885.08$0
Feb 20220091.054.86$0
Jan 20220081.844.54$0
Dec 20210071.323.90$0
Nov 20210077.435.24$0
Oct 20210079.795.71$0
Sep 20210069.865.35$0
Aug 20210066.024.22$0
Jul 20210070.783.98$0
Jun 20210069.493.38$0
May 20210063.483.02$0
Apr 20210060.362.76$0
Mar 20210061.302.72$0
Feb 20210057.805.55$0
Jan 20210050.412.81$0
Dec 20200044.642.68$0
Nov 20200038.772.71$0
Oct 20200036.972.48$0
Sep 20200037.091.99$0
Aug 20200039.982.39$0
Jul 20200038.371.83$0
Jun 20200034.901.69$0
May 20200016.921.81$0
Apr 20200014.751.80$0
Mar 20200030.341.86$0
Feb 20200049.881.98$0
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 201594043.433.10$4,082
Dec 2014132054.693.59$7,219
Nov 201478070.464.25$5,496
Oct 2014132078.303.90$10,336
Sep 2014116086.164.05$9,995
Aug 2014137089.394.04$12,246
Jul 201466096.564.18$6,373
Jun 20140098.164.74$0
May 2014124094.734.73$11,747
Apr 2014112095.944.81$10,745
Mar 20140095.895.06$0
Feb 20140097.406.19$0
Jan 20140090.404.86$0
Dec 2013111091.824.35$10,192
Nov 20130088.853.74$0
Oct 2013122097.423.78$11,885
Sep 201300104.113.72$0
Aug 20131090104.253.52$11,363
Jul 20131670102.523.72$17,121
Jun 2013149094.403.93$14,066
May 2013296094.834.15$28,070
Apr 20130093.964.28$0
Mar 2013169093.623.91$15,822
Feb 2013125091.233.42$11,404
Jan 2013120091.603.42$10,992
Dec 2012165086.773.42$14,317
Nov 2012150086.953.62$13,043
Oct 2012161089.383.40$14,390
Sep 20120094.672.92$0
Aug 2012154092.662.91$14,270
Jul 2012142085.133.02$12,088
Jun 20120079.822.52$0
May 201270091.612.49$6,413
Apr 20122860101.652.00$29,072
Mar 201200105.052.22$0
Feb 20121670101.102.57$16,884
Jan 2012150098.092.73$14,714
Dec 2011167096.873.24$16,177
Nov 2011173095.723.31$16,560
Oct 2011223084.983.65$18,951
Sep 2011152083.623.99$12,710
Aug 2011177083.404.15$14,762
Jul 2011166094.144.52$15,627
Jun 201165092.904.64$6,039
May 2011181098.134.40$17,762
Apr 201100105.964.33$0
Mar 2011168096.364.06$16,188
Feb 2011118085.644.18$10,106
Jan 2011278086.504.59$24,047
Dec 2010166085.734.35$14,231
Nov 2010154080.843.80$12,449
Oct 2010225078.103.51$17,573
Sep 2010164072.633.98$11,911
Aug 2010144073.684.42$10,610
Jul 2010166072.554.74$12,043
Jun 2010109070.364.91$7,669
May 2010158071.124.24$11,237
Apr 2010169081.694.12$13,806
Mar 2010153078.394.39$11,994
Feb 2010324073.585.44$23,840
Jan 20100074.365.96$0
Dec 2009261071.445.48$18,646
Nov 2009166074.593.75$12,382
Oct 2009272072.544.11$19,731
Sep 2009160065.543.06$10,486
Aug 2009221067.423.22$14,900
Jul 2009252061.133.46$15,405
Jun 2009167066.163.90$11,049
May 2009248054.743.93$13,576
Apr 2009172046.773.59$8,044
Mar 2009272042.144.06$11,462
Feb 2009158032.814.63$5,184
Jan 2009239035.865.37$8,571
Dec 2008247037.105.98$9,164
Nov 2008157055.496.86$8,712
Oct 2008290075.246.92$21,820
Sep 20083280101.767.88$33,377
Aug 200800114.228.48$0
Jul 20082940131.0811.39$38,538
Jun 20083100131.3313.03$40,712
May 200800123.1711.57$0
Apr 20081470110.3110.45$16,216
Mar 20082740101.909.66$27,921
Feb 2008328092.538.77$30,350
Jan 2008149090.388.21$13,467
Dec 2007182088.337.30$16,076
Nov 2007306091.677.29$28,051
Oct 20070082.856.92$0
Sep 2007308075.846.24$23,359
Aug 2007329069.066.39$22,721
Jul 2007145070.906.39$10,281
Jun 2007162062.007.55$10,044
May 2007428058.747.85$25,141
Apr 2007351059.617.81$20,923
Mar 2007352056.927.30$20,036
Feb 2007356055.108.22$19,616
Jan 2007350050.306.73$17,605
Dec 2006168056.656.92$9,517
Nov 2006178054.207.62$9,648
Oct 2006140054.906.01$7,686
Sep 2006169060.085.04$10,154
Aug 2006174068.717.34$11,956
Jul 2006348069.376.34$24,141
Jun 2006178066.286.38$11,798
May 2006170066.016.42$11,222
Apr 2006312064.397.36$20,090
Mar 2006176056.707.08$9,979
Feb 20060057.597.75$0
Jan 20060060.598.93$0
Dec 20050054.9413.42$0
Nov 2005175054.6910.59$9,571
Oct 2005173058.3413.80$10,093
Sep 2005154061.4512.08$9,463
Aug 2005466061.519.80$28,664
Jul 2005135055.697.84$7,518
Jun 20050052.337.38$0
May 20050045.226.65$0
Apr 20050049.207.36$0
Mar 20050050.377.15$0
Feb 20050045.226.31$0
Jan 20050043.166.32$0
Dec 20040039.866.75$0
Nov 20040045.286.33$0
Oct 2004135049.706.52$6,710
Sep 20040043.245.28$0
Aug 20040042.375.55$0
Jul 20040038.286.08$0
Jun 20040036.106.43$0
May 20040037.486.49$0
Apr 20040034.475.86$0
Mar 20040034.365.53$0
Feb 20040032.455.51$0
Jan 20040032.036.30$0
Dec 20030030.266.30$0
Nov 20030028.804.60$0
Oct 20030028.174.76$0
Sep 20030026.314.75$0
Aug 20030029.765.13$0
Jul 20030029.415.17$0
Jun 20030028.565.98$0
May 20030026.595.97$0
Apr 20030026.675.41$0
Mar 20030031.146.10$0
Feb 20030033.487.93$0
Jan 20030030.315.58$0
Dec 20020026.914.85$0
Nov 20020024.664.14$0
Oct 20020026.464.23$0
Sep 20020027.443.64$0
Aug 20020025.963.16$0
Jul 20020024.583.06$0
Jun 20020023.733.34$0
May 20020024.663.58$0
Apr 20020023.653.51$0
Mar 20020022.003.10$0
Feb 20020018.222.38$0
Jan 20020017.172.38$0
Dec 20010016.932.36$0
Nov 20010018.072.41$0
Oct 2001130019.782.53$2,571
Sep 2001537024.262.25$13,028
Aug 2001469024.873.05$11,664
Jul 2001506023.933.20$12,109
Jun 2001492024.563.82$12,084
May 2001535025.524.31$13,653
Apr 2001535024.685.34$13,204
Mar 2001498024.545.38$12,221
Feb 2001227027.755.77$6,299
Jan 2001603027.478.40$16,564
Dec 2000603026.889.12$16,209
Nov 2000602032.215.66$19,390
Oct 2000610031.235.15$19,050
Sep 2000579031.875.19$18,453
Aug 2000689029.644.54$20,422
Jul 2000675028.534.09$19,258
Jun 2000536029.304.40$15,705
May 2000649027.263.68$17,692
Apr 2000335024.513.12$8,211
Mar 20004373728.422.86$12,525
Feb 20003863427.622.73$10,754
Jan 20005872925.272.48$14,905
Dec 19993842924.282.42$9,394
Nov 19993972823.192.43$9,275
Oct 19995082920.982.80$10,739
Sep 19993092821.752.62$6,794
Aug 19993382919.262.88$6,593
Jul 19993572917.892.37$6,456
Jun 19993582815.942.36$5,773
May 19993732915.792.32$5,957
Apr 19993482815.102.21$5,317
Mar 19993882912.471.84$4,892
Feb 1999336269.981.82$3,401
Jan 19994463510.381.90$4,696
Dec 1998369399.201.77$3,464
Nov 19984933810.892.19$5,452
Oct 19984324312.421.97$5,450
Sep 19984443212.592.08$5,657
Aug 19984794611.301.91$5,500
Jul 19985224611.742.24$6,231
Jun 19985773711.242.24$6,568
May 19984803912.622.21$6,144
Apr 19985595013.042.51$7,415
Mar 19986555312.802.31$8,506
Feb 19984934313.952.30$6,976
Jan 19986355514.702.15$9,453
Dec 19975745416.322.41$9,498
Nov 19976035218.193.09$11,129
Oct 19976145719.253.15$11,999
Sep 19976255317.742.95$11,244
Aug 19976896417.862.55$12,469
Jul 19977486517.582.25$13,296
Jun 19977316217.242.26$12,742
May 19978046418.972.31$15,400
Apr 19977046517.882.08$12,723
Mar 19978077218.951.94$15,432
Feb 19976606220.492.21$13,660
Jan 19978356923.483.54$19,850
Dec 19967867023.32$18,330
Nov 19967716821.97$16,939
Oct 19968277223.31$19,277
Sep 19968167022.22$18,132
Aug 19961,0188220.26$20,625
Jul 19969838519.55$19,218
Jun 19969758218.73$18,262
May 19969128419.43$17,720
Apr 19968817721.51$18,950
Mar 19969488419.38$18,372
Feb 19968907116.98$15,112
Jan 19969538917.07$16,268
Dec 19951,0299517.19$17,689
Nov 19959959016.00$15,920
Oct 19951,0329115.43$15,924
Sep 19951,0488916.18$16,957
Aug 19951,1299815.92$17,974
Jul 19951,17111315.24$17,846
Jun 19951,1939516.41$19,577
May 19951,32812117.56$23,320
Apr 19951,0329517.73$18,297
Mar 19951,21310716.44$19,942
Feb 19951,0219516.58$16,928
Jan 19951,0889415.92$17,321
Dec 19941,15310415.03$17,330
Nov 19941,16511715.90$18,524
Oct 19941,26611015.58$19,724
Sep 19941,24910415.29$19,097
Aug 19941,28712116.13$20,759
Jul 19941,41112217.56$24,777
Jun 19941,39610717.09$23,858
May 19941,57513115.88$25,011
Apr 19941,62513314.14$22,978
Mar 19941,66513912.46$20,746
Feb 19941,44114412.50$18,013
Jan 19941,63513412.66$20,699
Dec 19931,62113412.33$19,987
Nov 19931,59813214.49$23,155
Oct 19931,68016115.85$26,628
Sep 19931,71615015.03$25,791
Aug 19932,03117615.66$31,805
Jul 19931,98221815.46$30,642
Jun 19932,25421216.79$37,845
May 19932,18420217.68$38,613
Apr 19932,05419518.05$37,075
Mar 19932,37424318.14$43,064
Feb 19932,21129017.90$39,577
Jan 19932,74325016.93$46,439

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.

Jan 2015 — as filed, then multipliedworked
Oil                   94 bbl  × $ 43.43 =     $4,082
Casinghead gas         0 Mcf  × $  3.10 =         $0

────────────────────────────────────────────────────
Month total                                   $4,082

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/66110 is the state's own key, not one this site invented.