MANDUJANO, ALFONZO

Operated by MANDUJANO, ALFONSO, JR. (P-5 523888) in the SOMERSET field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 11275District 01Field 84560001OilCasinghead gasSaveExport
Value, all time
$1.5 M
Jan 1993 – May 2026
Value, last 12 filed months
$55 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 1,033 leases and 5,137 wells, and the rule below applies to all of them.

Discovered
1911-12-31
as the register files it
Field class
Oil and gas
the register's own label
Between wells
330 ft
minimum
From a lease line
150 ft
minimum

A drilling unit in this field needs at least 2.05 acres. The field rule took effect on 1986-02-01.

The Commission's schedule remark for this field reads: RULES EFF. FOR SOMERSET FIELD 12-11-78.

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
OilDisposition23,639 bbl$1,457,737
Casinghead gasProduction22 Mcf$6
Total$1,457,743

20 Mcf of this lease's gas, across 20 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 (5)

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 29.2341, -98.6318. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.2 miles.

29.23439, -98.63194 · 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
0.0%
0 of 5 wells
With a plug date
0.0%
0 of 5 wells
Median depth
1,500 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
00.0%
A plug date is filed
00.0%
BothOn the schedule and plugged. Neither fact cancels the other.
00.0%
NeitherNo plug date, and not on the schedule.
5100.0%

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

Between 1,445 and 1,500 ft, median 1,500 ft, over the 5 wells that filed a depth.

Completions filed
Feb 1983 – Feb 1986
5 of 5 wells

5 wells

42-0293710951,445 ftFeb 1986
42-0293619731,490 ftJun 1985
42-0293619541,500 ftMar 1985
42-0293619611,500 ftFeb 1985
42-0293272221,500 ftFeb 1983

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 2026138098.932.87$13,652
Mar 2026164089.753.15$14,719
Feb 20260063.503.75$0
Jan 2026157059.138.00$9,283
Dec 20250056.664.41$0
Nov 20250058.593.93$0
Oct 20250059.383.30$0
Sep 2025136062.743.08$8,533
Aug 20250063.933.01$0
Jul 2025134066.743.32$8,943
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 2025142074.324.28$10,553
Dec 20240068.993.12$0
Nov 20240069.052.20$0
Oct 2024158071.372.28$11,276
Sep 20240069.612.36$0
Aug 2024127075.632.06$9,605
Jul 20240079.932.15$0
Jun 2024162078.082.63$12,649
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 2023162089.042.74$14,424
Aug 20230080.522.67$0
Jul 20230074.852.64$0
Jun 2023153068.962.26$10,551
May 20230070.622.23$0
Apr 20230078.122.24$0
Mar 2023153072.852.39$11,146
Feb 20230075.112.47$0
Jan 2023153076.533.39$11,709
Dec 20220076.415.73$0
Nov 20220085.005.65$0
Oct 2022153087.185.86$13,339
Sep 20220084.888.16$0
Aug 2022136094.529.13$12,855
Jul 202200101.587.54$0
Jun 20221380115.097.98$15,882
May 202200109.378.43$0
Apr 202200104.226.84$0
Mar 20221310108.885.08$14,263
Feb 20220091.054.86$0
Jan 2022121081.844.54$9,903
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 2021136070.783.98$9,626
Jun 20210069.493.38$0
May 20210063.483.02$0
Apr 20210060.362.76$0
Mar 2021143061.302.72$8,766
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 2020133049.881.98$6,634
Jan 20200057.252.09$0
Dec 2019131059.012.30$7,730
Nov 20190055.302.75$0
Oct 2019141053.472.42$7,539
Sep 20190055.052.66$0
Aug 2019136053.112.30$7,223
Jul 20190056.272.46$0
Jun 2019139052.782.49$7,336
May 20190058.482.74$0
Apr 2019132062.632.75$8,267
Mar 20190056.803.06$0
Feb 20190050.852.79$0
Jan 20190046.033.23$0
Dec 2018138046.594.19$6,429
Nov 20180052.934.24$0
Oct 20180061.443.40$0
Sep 2018148059.543.11$8,812
Aug 20180059.403.07$0
Jul 2018135065.142.93$8,794
Jun 2018139060.183.08$8,365
May 20180065.382.90$0
Apr 2018128063.842.90$8,172
Mar 20180061.222.79$0
Feb 20180061.782.77$0
Jan 20180062.874.01$0
Dec 20170057.272.92$0
Nov 2017106055.423.12$5,875
Oct 20170049.292.98$0
Sep 20170047.523.09$0
Aug 20170045.373.00$0
Jul 20170043.873.09$0
Jun 2017130042.493.09$5,524
May 20170045.373.26$0
Apr 20170047.933.21$0
Mar 20170046.772.98$0
Feb 2017133050.452.95$6,710
Jan 20170049.413.42$0
Dec 20160048.763.72$0
Nov 2016142042.492.64$6,034
Oct 20160046.193.09$0
Sep 20160041.553.10$0
Aug 2016138041.442.92$5,719
Jul 20160041.622.92$0
Jun 2016135045.352.69$6,122
May 20160042.521.99$0
Apr 2016138036.561.99$5,045
Mar 20160033.011.79$0
Feb 2016127026.472.06$3,362
Jan 20160027.352.36$0
Dec 2015144032.362.00$4,660
Nov 20150038.792.17$0
Oct 2015141043.552.43$6,141
Sep 20150042.992.76$0
Aug 2015142040.162.87$5,703
Jul 20150048.152.95$0
Jun 20150056.152.88$0
May 2015123055.212.96$6,791
Apr 20150049.822.71$0
Mar 20150042.892.93$0
Feb 2015141044.662.98$6,297
Jan 20150043.433.10$0
Dec 20140054.693.59$0
Nov 201476070.464.25$5,355
Oct 201493078.303.90$7,282
Sep 20140086.164.05$0
Aug 201475089.394.04$6,704
Jul 20140096.564.18$0
Jun 2014117098.164.74$11,485
May 201481094.734.73$7,673
Apr 20140095.944.81$0
Mar 2014146095.895.06$14,000
Feb 20140097.406.19$0
Jan 2014149090.404.86$13,470
Dec 2013208091.824.35$19,099
Nov 2013153088.853.74$13,594
Oct 2013153097.423.78$14,905
Sep 20131460104.113.72$15,200
Aug 20131430104.253.52$14,908
Jul 20131430102.523.72$14,660
Jun 2013153094.403.93$14,443
May 2013282094.834.15$26,742
Apr 2013141093.964.28$13,248
Mar 2013125093.623.91$11,703
Feb 2013139091.233.42$12,681
Jan 2013146091.603.42$13,374
Dec 2012139086.773.42$12,061
Nov 2012141086.953.62$12,260
Oct 2012139089.383.40$12,424
Sep 2012132094.672.92$12,496
Aug 2012139092.662.91$12,880
Jul 2012141085.133.02$12,003
Jun 2012153079.822.52$12,212
May 2012153091.612.49$14,016
Apr 20121460101.652.00$14,841
Mar 20121400105.052.22$14,707
Feb 20121320101.102.57$13,345
Jan 2012115098.092.73$11,280
Dec 20110096.873.24$0
Nov 2011139095.723.31$13,305
Oct 2011132084.983.65$11,217
Sep 2011129083.623.99$10,787
Aug 2011139083.404.15$11,593
Jul 2011153094.144.52$14,403
Jun 20110092.904.64$0
May 2011146098.134.40$14,327
Apr 20111460105.964.33$15,470
Mar 2011153096.364.06$14,743
Feb 2011150085.644.18$12,846
Jan 2011153086.504.59$13,235
Dec 2010153085.734.35$13,117
Nov 2010146080.843.80$11,803
Oct 2010142078.103.51$11,090
Sep 2010146072.633.98$10,604
Aug 2010131073.684.42$9,652
Jul 2010126072.554.74$9,141
Jun 2010132070.364.91$9,288
May 2010127071.124.24$9,032
Apr 2010126081.694.12$10,293
Mar 20100078.394.39$0
Feb 2010125073.585.44$9,198
Jan 2010113074.365.96$8,403
Dec 20090071.445.48$0
Nov 2009125074.593.75$9,324
Oct 2009127072.544.11$9,213
Sep 2009126065.543.06$8,258
Aug 20090067.423.22$0
Jul 2009141061.133.46$8,619
Jun 20090066.163.90$0
May 2009126054.743.93$6,897
Apr 2009125046.773.59$5,846
Mar 2009132042.144.06$5,562
Feb 20090032.814.63$0
Jan 2009139035.865.37$4,985
Dec 2008139037.105.98$5,157
Nov 20080055.496.86$0
Oct 2008126075.246.92$9,480
Sep 20081200101.767.88$12,211
Aug 200800114.228.48$0
Jul 20081460131.0811.39$19,138
Jun 20081460131.3313.03$19,174
May 20081030123.1711.57$12,687
Apr 20081450110.3110.45$15,995
Mar 20081290101.909.66$13,145
Feb 2008145092.538.77$13,417
Jan 2008133090.388.21$12,021
Dec 2007149088.337.30$13,161
Nov 2007155091.677.29$14,209
Oct 2007154082.856.92$12,759
Sep 2007152075.846.24$11,528
Aug 2007140069.066.39$9,668
Jul 2007160070.906.39$11,344
Jun 2007153062.007.55$9,486
May 20070058.747.85$0
Apr 2007154059.617.81$9,180
Mar 20070056.927.30$0
Feb 20070055.108.22$0
Jan 20070050.306.73$0
Dec 20060056.656.92$0
Nov 20060054.207.62$0
Oct 20060054.906.01$0
Sep 20060060.085.04$0
Aug 20060068.717.34$0
Jul 20060069.376.34$0
Jun 20060066.286.38$0
May 20060066.016.42$0
Apr 20060064.397.36$0
Mar 20060056.707.08$0
Feb 20060057.597.75$0
Jan 20060060.598.93$0
Dec 20050054.9413.42$0
Nov 20050054.6910.59$0
Oct 20050058.3413.80$0
Sep 20050061.4512.08$0
Aug 20050061.519.80$0
Jul 20050055.697.84$0
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 20040049.706.52$0
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 200379028.174.76$2,225
Sep 20030026.314.75$0
Aug 20030029.765.13$0
Jul 20030029.415.17$0
Jun 2003158028.565.98$4,512
May 20030026.595.97$0
Apr 2003163026.675.41$4,347
Mar 2003113031.146.10$3,519
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 200280023.733.34$1,898
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 2001125016.932.36$2,116
Nov 20010018.072.41$0
Oct 20010019.782.53$0
Sep 200161024.262.25$1,480
Aug 20010024.873.05$0
Jul 200159023.933.20$1,412
Jun 200152024.563.82$1,277
May 200152025.524.31$1,327
Apr 200169024.685.34$1,703
Mar 200180024.545.38$1,963
Feb 200198027.755.77$2,720
Jan 200185027.478.40$2,335
Dec 20000026.889.12$0
Nov 200082032.215.66$2,641
Oct 200065031.235.15$2,030
Sep 200080031.875.19$2,550
Aug 200087029.644.54$2,579
Jul 200093028.534.09$2,653
Jun 200088029.304.40$2,578
May 200061027.263.68$1,663
Apr 2000158024.513.12$3,873
Mar 2000140028.422.86$3,979
Feb 200096027.622.73$2,652
Jan 2000189025.272.48$4,776
Dec 199946024.282.42$1,117
Nov 199947023.192.43$1,090
Oct 199952020.982.80$1,091
Sep 19990021.752.62$0
Aug 1999164019.262.88$3,159
Jul 19990017.892.37$0
Jun 19990015.942.36$0
May 19990015.792.32$0
Apr 19990015.102.21$0
Mar 19990012.471.84$0
Feb 1999009.981.82$0
Jan 19990010.381.90$0
Dec 19987709.201.77$708
Nov 1998115010.892.19$1,252
Oct 1998163012.421.97$2,024
Sep 19980012.592.08$0
Aug 1998126011.301.91$1,424
Jul 19980011.742.24$0
Jun 1998126011.242.24$1,416
May 1998138012.622.21$1,742
Apr 1998123013.042.51$1,604
Mar 1998130012.802.31$1,664
Feb 1998212013.952.30$2,957
Jan 199894014.702.15$1,382
Dec 19970016.322.41$0
Nov 1997131018.193.09$2,383
Oct 1997140019.253.15$2,695
Sep 1997135017.742.95$2,395
Aug 1997153017.862.55$2,733
Jul 1997124017.582.25$2,180
Jun 1997110017.242.26$1,896
May 1997134018.972.31$2,542
Apr 1997147017.882.08$2,628
Mar 1997409018.951.94$7,751
Feb 1997257120.492.21$5,268
Jan 1997156123.483.54$3,666
Dec 19960023.32$0
Nov 19960021.97$0
Oct 19960023.31$0
Sep 19960022.22$0
Aug 19960020.26$0
Jul 19960019.55$0
Jun 19960018.73$0
May 19960019.43$0
Apr 19960021.51$0
Mar 19960019.38$0
Feb 19960016.98$0
Jan 19960017.07$0
Dec 19950017.19$0
Nov 19950016.00$0
Oct 19950015.43$0
Sep 19950016.18$0
Aug 19950015.92$0
Jul 19950015.24$0
Jun 19950016.41$0
May 19950017.56$0
Apr 19950017.73$0
Mar 19950016.44$0
Feb 19950116.58$0
Jan 19950115.92$0
Dec 19940115.03$0
Nov 19940115.90$0
Oct 19940115.58$0
Sep 19940115.29$0
Aug 19940016.13$0
Jul 19940017.56$0
Jun 19940017.09$0
May 19940115.88$0
Apr 19940014.14$0
Mar 19940012.46$0
Feb 19940012.50$0
Jan 19940112.66$0
Dec 199357112.33$703
Nov 199362114.49$898
Oct 199385115.85$1,347
Sep 19930115.03$0
Aug 1993168115.66$2,631
Jul 19930115.46$0
Jun 19930116.79$0
May 1993134117.68$2,369
Apr 19930118.05$0
Mar 199376118.14$1,379
Feb 199378117.90$1,396
Jan 199384116.93$1,422

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.

Apr 2026 — as filed, then multipliedworked
Oil                  138 bbl  × $ 98.93 =    $13,652
Casinghead gas         0 Mcf  × $  2.87 =         $0

────────────────────────────────────────────────────
Month total                                  $13,652

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. 01/O/11275 is the state's own key, not one this site invented.