SHAFFER, M. C. 155

Operated by BUSTAMANTE RESOURCES LLC (P-5 112682) in the TAYLOR COUNTY REGULAR field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 11591District 7BField 88520001OilCasinghead gasSaveExport
Value, all time
$3.6 M
Jan 1993 – May 2026
Value, last 12 filed months
$30 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 717 leases and 1,491 wells, and the rule below applies to all of them.

Discovered
1929-12-31
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
OilDisposition100,531 bbl$3,589,059
Casinghead gasProduction46 Mcf$0
Total$3,589,059

46 Mcf of this lease's gas, across 33 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 (3)

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 32.1767, -99.9581. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.2 miles.

32.17663, -99.95830 · 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%
2 of 3 wells
With a plug date
66.7%
2 of 3 wells
Median depth
2,845 ft
3 wells filed one
Completion to plug
31.8 years
median over 2 wells

What the state filed about each well

On the RRC proration schedule
266.7%
A plug date is filed
266.7%
BothOn the schedule and plugged. Neither fact cancels the other.
266.7%
NeitherNo plug date, and not on the schedule.
133.3%

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 2,819 and 2,893 ft, median 2,845 ft, over the 3 wells that filed a depth.

Completions filed
Sep 1971 – Jul 1975
3 of 3 wells
Plug dates filed
Sep 1995 – Jun 2011
2 of 3 wells; 1 filed none

Last completion to plug: a median of 31.8 years across the 2 wells that filed both dates, with the middle half between 27.9 years and 35.7 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

3 wells

42-4413066942,893 ftJul 1975
42-4413031422,845 ftDec 1971Jun 2011Yes
42-4413028012,819 ftSep 1971Sep 1995Yes

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 2025142062.743.08$8,909
Aug 2025167063.933.01$10,676
Jul 20250066.743.32$0
Jun 2025162066.483.13$10,770
May 2025169060.553.23$10,233
Apr 20250062.363.54$0
Mar 2025172067.704.27$11,644
Feb 20250070.884.34$0
Jan 2025174074.324.28$12,932
Dec 20240068.993.12$0
Nov 2024174069.052.20$12,015
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 2024167078.812.20$13,161
Apr 20240084.451.66$0
Mar 2024171080.301.55$13,731
Feb 20240076.091.78$0
Jan 2024125073.023.30$9,128
Dec 20230071.262.61$0
Nov 2023170077.892.81$13,241
Oct 20230085.443.09$0
Sep 2023169089.042.74$15,048
Aug 20230080.522.67$0
Jul 2023173074.852.64$12,949
Jun 20230068.962.26$0
May 20230070.622.23$0
Apr 20230078.122.24$0
Mar 2023155072.852.39$11,292
Feb 2023177075.112.47$13,294
Jan 20230076.533.39$0
Dec 2022164076.415.73$12,531
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 20221660115.097.98$19,105
May 202200109.378.43$0
Apr 20221750104.226.84$18,239
Mar 20221660108.885.08$18,074
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 2021165069.493.38$11,466
May 20210063.483.02$0
Apr 2021171060.362.76$10,322
Mar 2021170061.302.72$10,421
Feb 20210057.805.55$0
Jan 2021168050.412.81$8,469
Dec 2020164044.642.68$7,321
Nov 20200038.772.71$0
Oct 20200036.972.48$0
Sep 2020169037.091.99$6,268
Aug 20200039.982.39$0
Jul 20200038.371.83$0
Jun 2020153034.901.69$5,340
May 2020163016.921.81$2,758
Apr 20200014.751.80$0
Mar 2020167030.341.86$5,067
Feb 2020165049.881.98$8,230
Jan 2020161057.252.09$9,217
Dec 2019166059.012.30$9,796
Nov 20190055.302.75$0
Oct 2019162053.472.42$8,662
Sep 2019169055.052.66$9,303
Aug 20190053.112.30$0
Jul 2019169056.272.46$9,510
Jun 2019169052.782.49$8,920
May 2019166058.482.74$9,708
Apr 20190062.632.75$0
Mar 2019168056.803.06$9,542
Feb 2019166050.852.79$8,441
Jan 2019170046.033.23$7,825
Dec 2018166046.594.19$7,734
Nov 2018167052.934.24$8,839
Oct 20180061.443.40$0
Sep 2018165059.543.11$9,824
Aug 2018160059.403.07$9,504
Jul 2018173065.142.93$11,269
Jun 2018159060.183.08$9,569
May 2018161065.382.90$10,526
Apr 2018163063.842.90$10,406
Mar 2018158061.222.79$9,673
Feb 20180061.782.77$0
Jan 2018170062.874.01$10,688
Dec 20170057.272.92$0
Nov 2017169055.423.12$9,366
Oct 2017170049.292.98$8,379
Sep 2017164047.523.09$7,793
Aug 20170045.373.00$0
Jul 2017165043.873.09$7,239
Jun 2017158042.493.09$6,713
May 2017171045.373.26$7,758
Apr 2017159047.933.21$7,621
Mar 20170046.772.98$0
Feb 2017165050.452.95$8,324
Jan 2017163049.413.42$8,054
Dec 20160048.763.72$0
Nov 20160042.492.64$0
Oct 2016168046.193.09$7,760
Sep 2016174041.553.10$7,230
Aug 20160041.442.92$0
Jul 2016167041.622.92$6,951
Jun 2016175045.352.69$7,936
May 20160042.521.99$0
Apr 20160036.561.99$0
Mar 20160033.011.79$0
Feb 20160026.472.06$0
Jan 2016160027.352.36$4,376
Dec 20150032.362.00$0
Nov 2015178038.792.17$6,905
Oct 20150043.552.43$0
Sep 2015177042.992.76$7,609
Aug 2015169040.162.87$6,787
Jul 20150048.152.95$0
Jun 20150056.152.88$0
May 2015179055.212.96$9,883
Apr 2015175049.822.71$8,719
Mar 2015168042.892.93$7,206
Feb 20150044.662.98$0
Jan 20150043.433.10$0
Dec 20140054.693.59$0
Nov 2014175070.464.25$12,331
Oct 20140078.303.90$0
Sep 2014175086.164.05$15,078
Aug 2014175089.394.04$15,643
Jul 20140096.564.18$0
Jun 2014174098.164.74$17,080
May 2014173094.734.73$16,388
Apr 20140095.944.81$0
Mar 2014335095.895.06$32,123
Feb 20140097.406.19$0
Jan 2014172090.404.86$15,549
Dec 2013176091.824.35$16,160
Nov 2013179088.853.74$15,904
Oct 2013166097.423.78$16,172
Sep 201300104.113.72$0
Aug 20131710104.253.52$17,827
Jul 20133300102.523.72$33,832
Jun 2013164094.403.93$15,482
May 20130094.834.15$0
Apr 2013174093.964.28$16,349
Mar 2013180093.623.91$16,852
Feb 2013177091.233.42$16,148
Jan 20130091.603.42$0
Dec 2012178086.773.42$15,445
Nov 2012175086.953.62$15,216
Oct 20120089.383.40$0
Sep 2012175094.672.92$16,567
Aug 20120092.662.91$0
Jul 2012173085.133.02$14,727
Jun 2012177079.822.52$14,128
May 20120091.612.49$0
Apr 20121670101.652.00$16,976
Mar 201200105.052.22$0
Feb 20121780101.102.57$17,996
Jan 2012174098.092.73$17,068
Dec 20110096.873.24$0
Nov 2011172095.723.31$16,464
Oct 2011180084.983.65$15,296
Sep 20110083.623.99$0
Aug 2011178083.404.15$14,845
Jul 2011172094.144.52$16,192
Jun 2011172092.904.64$15,979
May 20110098.134.40$0
Apr 20111750105.964.33$18,543
Mar 2011173096.364.06$16,670
Feb 2011174085.644.18$14,901
Jan 2011173086.504.59$14,965
Dec 2010171085.734.35$14,660
Nov 2010177080.843.80$14,309
Oct 2010181078.103.51$14,136
Sep 20100072.633.98$0
Aug 2010172073.684.42$12,673
Jul 2010173072.554.74$12,551
Jun 2010178070.364.91$12,524
May 2010169071.124.24$12,019
Apr 2010175081.694.12$14,296
Mar 2010174078.394.39$13,640
Feb 2010177073.585.44$13,024
Jan 2010174074.365.96$12,939
Dec 20090071.445.48$0
Nov 2009174074.593.75$12,979
Oct 2009169072.544.11$12,259
Sep 2009174065.543.06$11,404
Aug 2009169067.423.22$11,394
Jul 2009168061.133.46$10,270
Jun 2009165066.163.90$10,916
May 2009166054.743.93$9,087
Apr 2009174046.773.59$8,138
Mar 2009182042.144.06$7,669
Feb 2009169032.814.63$5,545
Jan 2009178035.865.37$6,383
Dec 2008179037.105.98$6,641
Nov 2008173055.496.86$9,600
Oct 2008172075.246.92$12,941
Sep 20081740101.767.88$17,706
Aug 20083480114.228.48$39,749
Jul 20081810131.0811.39$23,725
Jun 20081770131.3313.03$23,245
May 20081820123.1711.57$22,417
Apr 20081800110.3110.45$19,856
Mar 20081790101.909.66$18,240
Feb 2008365092.538.77$33,773
Jan 2008178090.388.21$16,088
Dec 2007183088.337.30$16,164
Nov 2007183091.677.29$16,776
Oct 2007183082.856.92$15,162
Sep 2007157075.846.24$11,907
Aug 20070069.066.39$0
Jul 2007176070.906.39$12,478
Jun 20070062.007.55$0
May 2007363058.747.85$21,323
Apr 2007180059.617.81$10,730
Mar 20070056.927.30$0
Feb 2007362055.108.22$19,946
Jan 20070050.306.73$0
Dec 2006183056.656.92$10,367
Nov 2006369054.207.62$20,000
Oct 2006182054.906.01$9,992
Sep 2006178060.085.04$10,694
Aug 2006181068.717.34$12,437
Jul 2006361069.376.34$25,043
Jun 2006180066.286.38$11,930
May 2006182066.016.42$12,014
Apr 2006182064.397.36$11,719
Mar 2006294056.707.08$16,670
Feb 2006329057.597.75$18,947
Jan 2006179060.598.93$10,846
Dec 2005364054.9413.42$19,998
Nov 2005177054.6910.59$9,680
Oct 2005174058.3413.80$10,151
Sep 2005360061.4512.08$22,122
Aug 2005500061.519.80$30,755
Jul 2005155055.697.84$8,632
Jun 2005348052.337.38$18,211
May 2005176045.226.65$7,959
Apr 2005326049.207.36$16,039
Mar 2005357050.377.15$17,982
Feb 2005353045.226.31$15,963
Jan 2005353043.166.32$15,235
Dec 2004350039.866.75$13,951
Nov 2004345045.286.33$15,622
Oct 2004175049.706.52$8,698
Sep 2004345043.245.28$14,918
Aug 2004343042.375.55$14,533
Jul 2004394038.286.08$15,082
Jun 2004356036.106.43$12,852
May 2004177037.486.49$6,634
Apr 2004323034.475.86$11,134
Mar 2004171034.365.53$5,876
Feb 2004175032.455.51$5,679
Jan 2004177032.036.30$5,669
Dec 2003354030.266.30$10,712
Nov 2003341028.804.60$9,821
Oct 2003346028.174.76$9,747
Sep 2003516026.314.75$13,576
Aug 2003171029.765.13$5,089
Jul 2003337029.415.17$9,911
Jun 2003509028.565.98$14,537
May 2003163026.595.97$4,334
Apr 2003502026.675.41$13,388
Mar 2003357031.146.10$11,117
Feb 2003178033.487.93$5,959
Jan 2003359030.315.58$10,881
Dec 2002175026.914.85$4,709
Nov 2002496024.664.14$12,231
Oct 2002179026.464.23$4,736
Sep 2002351027.443.64$9,631
Aug 2002345025.963.16$8,956
Jul 2002156024.583.06$3,834
Jun 2002173023.733.34$4,105
May 2002352024.663.58$8,680
Apr 2002352023.653.51$8,325
Mar 2002360022.003.10$7,920
Feb 2002361018.222.38$6,577
Jan 2002352017.172.38$6,044
Dec 2001543016.932.36$9,193
Nov 2001349018.072.41$6,306
Oct 2001355019.782.53$7,022
Sep 2001516024.262.25$12,518
Aug 2001534024.873.05$13,281
Jul 2001356023.933.20$8,519
Jun 2001508024.563.82$12,476
May 2001541025.524.31$13,806
Apr 2001536024.685.34$13,228
Mar 2001550024.545.38$13,497
Feb 2001357027.755.77$9,907
Jan 2001512027.478.40$14,065
Dec 2000540026.889.12$14,515
Nov 2000353032.215.66$11,370
Oct 2000503031.235.15$15,709
Sep 2000678031.875.19$21,608
Aug 2000513029.644.54$15,205
Jul 2000347028.534.09$9,900
Jun 2000177029.304.40$5,186
May 20000027.263.68$0
Apr 20000024.513.12$0
Mar 2000360028.422.86$10,231
Feb 2000544027.622.73$15,025
Jan 2000179025.272.48$4,523
Dec 1999498024.282.42$12,091
Nov 1999327023.192.43$7,583
Oct 1999546020.982.80$11,455
Sep 1999363021.752.62$7,895
Aug 1999360019.262.88$6,934
Jul 1999355017.892.37$6,351
Jun 1999352015.942.36$5,611
May 19990015.792.32$0
Apr 19990015.102.21$0
Mar 1999367012.471.84$4,576
Feb 199935809.981.82$3,573
Jan 1999367010.381.90$3,809
Dec 199817709.201.77$1,628
Nov 1998184010.892.19$2,004
Oct 1998179012.421.97$2,223
Sep 1998530012.592.08$6,673
Aug 19980011.301.91$0
Jul 1998342011.742.24$4,015
Jun 1998534011.242.24$6,002
May 1998364012.622.21$4,594
Apr 1998545013.042.51$7,107
Mar 1998387012.802.31$4,954
Feb 1998183013.952.30$2,553
Jan 1998369014.702.15$5,424
Dec 1997389016.322.41$6,348
Nov 1997512018.193.09$9,313
Oct 1997350019.253.15$6,738
Sep 1997352017.742.95$6,244
Aug 1997526017.862.55$9,394
Jul 1997283017.582.25$4,975
Jun 1997349017.242.26$6,017
May 1997348018.972.31$6,602
Apr 1997530017.882.08$9,476
Mar 1997724018.951.94$13,720
Feb 1997368020.492.21$7,540
Jan 1997680023.483.54$15,966
Dec 19960023.32$0
Nov 1996519021.97$11,402
Oct 1996139023.31$3,240
Sep 1996519022.22$11,532
Aug 1996363020.26$7,354
Jul 1996539019.55$10,537
Jun 1996543018.73$10,170
May 1996203019.43$3,944
Apr 1996695021.51$14,949
Mar 1996714019.38$13,837
Feb 1996360016.98$6,113
Jan 1996741017.07$12,649
Dec 1995735017.19$12,635
Nov 1995662016.00$10,592
Oct 1995544015.43$8,394
Sep 1995535216.18$8,656
Aug 1995724215.92$11,526
Jul 1995718215.24$10,942
Jun 1995716216.41$11,750
May 19951,083217.56$19,017
Apr 1995542217.73$9,610
Mar 1995735216.44$12,083
Feb 1995552216.58$9,152
Jan 1995719215.92$11,446
Dec 1994718215.03$10,792
Nov 1994720215.90$11,448
Oct 1994717215.58$11,171
Sep 1994720215.29$11,009
Aug 1994898116.13$14,485
Jul 1994707117.56$12,415
Jun 1994895117.09$15,296
May 1994896115.88$14,228
Apr 1994898114.14$12,698
Mar 1994913112.46$11,376
Feb 1994522112.50$6,525
Jan 19941,093112.66$13,837
Dec 1993868112.33$10,702
Nov 1993716114.49$10,375
Oct 1993709115.85$11,238
Sep 19931,088115.03$16,353
Aug 1993833115.66$13,045
Jul 19931,086115.46$16,790
Jun 19931,097116.79$18,419
May 1993905117.68$16,000
Apr 19931,218118.05$21,985
Mar 19931,100118.14$19,954
Feb 1993552117.90$9,881
Jan 1993933116.93$15,796

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.

Sep 2025 — as filed, then multipliedworked
Oil                  142 bbl  × $ 62.74 =     $8,909
Casinghead gas         0 Mcf  × $  3.08 =         $0

────────────────────────────────────────────────────
Month total                                   $8,909

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. 7B/O/11591 is the state's own key, not one this site invented.