ROBINSON UNIT

Operated by CHOLLA PETROLEUM, INC. (P-5 150683) in the P. H. D. field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 4611District 8AField 68101001Hydrogen sulphide fieldOilCasinghead gasSaveExport
Value, all time
$3.4 M
Jan 1993 – Jan 2026
Value, last 12 filed months
$22 k
at the published price for each month
Months reported
397
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 35 leases and 206 wells, and the rule below applies to all of them.

Discovered
1944-06-20
as the register files it
Field class
Oil
the register's own label
Between wells
0 ft
minimum
From a lease line
330 ft
minimum

A drilling unit in this field needs at least 20 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: SWR 48.

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
OilDisposition72,409 bbl$3,366,943
Casinghead gasProduction28 Mcf$0
Total$3,366,943

28 Mcf of this lease's gas, across 28 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 33.2540, -101.4887. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.1 miles.

33.25406, -101.48895 · 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
33.3%
1 of 3 wells
With a plug date
33.3%
1 of 3 wells
Median depth
3,823 ft
2 wells filed one
Completion to plug
15.1 years
median over 1 well

What the state filed about each well

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

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 3,746 and 3,900 ft, median 3,823 ft, over the 2 wells that filed a depth.

Completions filed
Mar 1986 – Aug 2006
2 of 3 wells; 1 filed none
Plug dates filed
Apr 2001
1 of 3 wells; 2 filed none

Last completion to plug: a median of 15.1 years across the 1 well that filed both dates, with the middle half between 15.1 years and 15.1 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

3 wells

42-169010411
42-1693375933,746 ftAug 2006
42-1693264923,900 ftMar 1986Apr 2001Yes

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 (397)

Volume × price = value, one row per cycle. The price columns are the same series published on the prices page — nothing here is modelled.

397 months

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 2025331067.704.27$22,409
Feb 20250070.884.34$0
Jan 2025174074.324.28$12,932
Dec 2024168068.993.12$11,590
Nov 2024175069.052.20$12,084
Oct 2024172071.372.28$12,276
Sep 20240069.612.36$0
Aug 2024177075.632.06$13,387
Jul 2024173079.932.15$13,828
Jun 2024180078.082.63$14,054
May 2024178078.812.20$14,028
Apr 20240084.451.66$0
Mar 2024180080.301.55$14,454
Feb 2024179076.091.78$13,620
Jan 2024180073.023.30$13,144
Dec 20230071.262.61$0
Nov 2023169077.892.81$13,163
Oct 2023179085.443.09$15,294
Sep 2023175089.042.74$15,582
Aug 2023178080.522.67$14,333
Jul 20230074.852.64$0
Jun 2023180068.962.26$12,413
May 2023177070.622.23$12,500
Apr 2023182078.122.24$14,218
Mar 2023181072.852.39$13,186
Feb 20230075.112.47$0
Jan 2023185076.533.39$14,158
Dec 2022172076.415.73$13,143
Nov 2022181085.005.65$15,385
Oct 20220087.185.86$0
Sep 20220084.888.16$0
Aug 20220094.529.13$0
Jul 20221810101.587.54$18,386
Jun 20221760115.097.98$20,256
May 202200109.378.43$0
Apr 202200104.226.84$0
Mar 20221730108.885.08$18,836
Feb 2022171091.054.86$15,570
Jan 2022177081.844.54$14,486
Dec 2021176071.323.90$12,552
Nov 2021163077.435.24$12,621
Oct 2021162079.795.71$12,926
Sep 20210069.865.35$0
Aug 2021171066.024.22$11,289
Jul 2021179070.783.98$12,670
Jun 2021170069.493.38$11,813
May 2021174063.483.02$11,046
Apr 2021177060.362.76$10,684
Mar 2021169061.302.72$10,360
Feb 2021171057.805.55$9,884
Jan 2021180050.412.81$9,074
Dec 2020166044.642.68$7,410
Nov 2020340038.772.71$13,182
Oct 20200036.972.48$0
Sep 2020174037.091.99$6,454
Aug 2020356039.982.39$14,233
Jul 2020166038.371.83$6,369
Jun 2020319034.901.69$11,133
May 20200016.921.81$0
Apr 2020176014.751.80$2,596
Mar 2020177030.341.86$5,370
Feb 20200049.881.98$0
Jan 2020174057.252.09$9,962
Dec 2019187059.012.30$11,035
Nov 2019175055.302.75$9,678
Oct 2019172053.472.42$9,197
Sep 2019179055.052.66$9,854
Aug 2019174053.112.30$9,241
Jul 2019174056.272.46$9,791
Jun 20190052.782.49$0
May 20190058.482.74$0
Apr 2019171062.632.75$10,710
Mar 2019178056.803.06$10,110
Feb 2019181050.852.79$9,204
Jan 20190046.033.23$0
Dec 2018175046.594.19$8,153
Nov 2018352052.934.24$18,631
Oct 2018175061.443.40$10,752
Sep 20180059.543.11$0
Aug 2018180059.403.07$10,692
Jul 2018168065.142.93$10,944
Jun 2018164060.183.08$9,870
May 2018163065.382.90$10,657
Apr 2018356063.842.90$22,727
Mar 2018167061.222.79$10,224
Feb 2018169061.782.77$10,441
Jan 2018184062.874.01$11,568
Dec 20170057.272.92$0
Nov 2017180055.423.12$9,976
Oct 2017347049.292.98$17,104
Sep 2017174047.523.09$8,268
Aug 2017173045.373.00$7,849
Jul 2017178043.873.09$7,809
Jun 2017179042.493.09$7,606
May 2017324045.373.26$14,700
Apr 20170047.933.21$0
Mar 2017171046.772.98$7,998
Feb 2017173050.452.95$8,728
Jan 2017176049.413.42$8,696
Dec 2016181048.763.72$8,826
Nov 20160042.492.64$0
Oct 20160046.193.09$0
Sep 20160041.553.10$0
Aug 2016178041.442.92$7,376
Jul 2016176041.622.92$7,325
Jun 2016340045.352.69$15,419
May 2016178042.521.99$7,569
Apr 2016178036.561.99$6,508
Mar 2016180033.011.79$5,942
Feb 2016175026.472.06$4,632
Jan 2016174027.352.36$4,759
Dec 2015172032.362.00$5,566
Nov 2015171038.792.17$6,633
Oct 2015185043.552.43$8,057
Sep 2015178042.992.76$7,652
Aug 2015172040.162.87$6,908
Jul 2015212048.152.95$10,208
Jun 2015177056.152.88$9,939
May 2015185055.212.96$10,214
Apr 2015177049.822.71$8,818
Mar 2015179042.892.93$7,677
Feb 2015179044.662.98$7,994
Jan 2015185043.433.10$8,035
Dec 2014186054.693.59$10,172
Nov 2014182070.464.25$12,824
Oct 2014182078.303.90$14,251
Sep 2014181086.164.05$15,595
Aug 2014356089.394.04$31,823
Jul 20140096.564.18$0
Jun 2014347098.164.74$34,062
May 2014179094.734.73$16,957
Apr 2014361095.944.81$34,634
Mar 2014186095.895.06$17,836
Feb 2014174097.406.19$16,948
Jan 2014161090.404.86$14,554
Dec 2013184091.824.35$16,895
Nov 2013177088.853.74$15,726
Oct 2013326097.423.78$31,759
Sep 201300104.113.72$0
Aug 20131760104.253.52$18,348
Jul 20131810102.523.72$18,556
Jun 2013171094.403.93$16,142
May 2013174094.834.15$16,500
Apr 2013179093.964.28$16,819
Mar 2013183093.623.91$17,132
Feb 2013173091.233.42$15,783
Jan 2013178091.603.42$16,305
Dec 2012357086.773.42$30,977
Nov 20120086.953.62$0
Oct 2012355089.383.40$31,730
Sep 2012172094.672.92$16,283
Aug 2012174092.662.91$16,123
Jul 2012179085.133.02$15,238
Jun 2012176079.822.52$14,048
May 2012170091.612.49$15,574
Apr 20123490101.652.00$35,476
Mar 20121790105.052.22$18,804
Feb 20121810101.102.57$18,299
Jan 2012183098.092.73$17,950
Dec 2011173096.873.24$16,759
Nov 2011173095.723.31$16,560
Oct 20110084.983.65$0
Sep 20110083.623.99$0
Aug 20110083.404.15$0
Jul 2011175094.144.52$16,475
Jun 2011161092.904.64$14,957
May 2011167098.134.40$16,388
Apr 20111830105.964.33$19,391
Mar 2011182096.364.06$17,538
Feb 20110085.644.18$0
Jan 20110086.504.59$0
Dec 20100085.734.35$0
Nov 2010367080.843.80$29,668
Oct 2010180078.103.51$14,058
Sep 2010176072.633.98$12,783
Aug 2010173073.684.42$12,747
Jul 20100072.554.74$0
Jun 2010352070.364.91$24,767
May 2010168071.124.24$11,948
Apr 2010168081.694.12$13,724
Mar 2010165078.394.39$12,934
Feb 2010292073.585.44$21,485
Jan 2010165074.365.96$12,269
Dec 2009156071.445.48$11,145
Nov 20090074.593.75$0
Oct 2009181072.544.11$13,130
Sep 2009357065.543.06$23,398
Aug 2009181067.423.22$12,203
Jul 2009178061.133.46$10,881
Jun 2009173066.163.90$11,446
May 2009172054.743.93$9,415
Apr 2009339046.773.59$15,855
Mar 2009177042.144.06$7,459
Feb 2009158032.814.63$5,184
Jan 2009166035.865.37$5,953
Dec 20080037.105.98$0
Nov 2008184055.496.86$10,210
Oct 2008356075.246.92$26,785
Sep 20081810101.767.88$18,419
Aug 20081800114.228.48$20,560
Jul 20081750131.0811.39$22,939
Jun 20081710131.3313.03$22,457
May 20083330123.1711.57$41,016
Apr 20081630110.3110.45$17,981
Mar 200800101.909.66$0
Feb 20080092.538.77$0
Jan 20080090.388.21$0
Dec 2007142088.337.30$12,543
Nov 2007171091.677.29$15,676
Oct 2007162082.856.92$13,422
Sep 2007170075.846.24$12,893
Aug 20070069.066.39$0
Jul 2007142070.906.39$10,068
Jun 2007122062.007.55$7,564
May 2007270058.747.85$15,860
Apr 2007180059.617.81$10,730
Mar 2007148056.927.30$8,424
Feb 2007148055.108.22$8,155
Jan 20070050.306.73$0
Dec 2006248056.656.92$14,049
Nov 2006148054.207.62$8,022
Oct 2006136054.906.01$7,466
Sep 2006211060.085.04$12,677
Aug 2006139068.717.34$9,551
Jul 2006193069.376.34$13,388
Jun 2006323066.286.38$21,408
May 2006123066.016.42$8,119
Apr 2006134064.397.36$8,628
Mar 2006138056.707.08$7,825
Feb 2006139057.597.75$8,005
Jan 2006139060.598.93$8,422
Dec 2005164054.9413.42$9,010
Nov 2005134054.6910.59$7,328
Oct 2005239058.3413.80$13,943
Sep 2005132061.4512.08$8,111
Aug 2005242061.519.80$14,885
Jul 200554055.697.84$3,007
Jun 2005130052.337.38$6,803
May 2005130045.226.65$5,879
Apr 2005135049.207.36$6,642
Mar 2005143050.377.15$7,203
Feb 2005290045.226.31$13,114
Jan 200587043.166.32$3,755
Dec 2004269039.866.75$10,722
Nov 2004136045.286.33$6,158
Oct 2004189049.706.52$9,393
Sep 2004160043.245.28$6,918
Aug 2004187042.375.55$7,923
Jul 2004168038.286.08$6,431
Jun 20040036.106.43$0
May 2004163037.486.49$6,109
Apr 2004194034.475.86$6,687
Mar 2004176034.365.53$6,047
Feb 2004134032.455.51$4,348
Jan 2004137032.036.30$4,388
Dec 2003308030.266.30$9,320
Nov 2003136028.804.60$3,917
Oct 2003131028.174.76$3,690
Sep 2003140026.314.75$3,683
Aug 2003136029.765.13$4,047
Jul 2003271029.415.17$7,970
Jun 2003136028.565.98$3,884
May 2003139026.595.97$3,696
Apr 2003159026.675.41$4,241
Mar 2003140031.146.10$4,360
Feb 2003180033.487.93$6,026
Jan 2003155030.315.58$4,698
Dec 2002178026.914.85$4,790
Nov 2002184024.664.14$4,537
Oct 2002145026.464.23$3,837
Sep 2002144027.443.64$3,951
Aug 2002146025.963.16$3,790
Jul 2002286024.583.06$7,030
Jun 2002138023.733.34$3,275
May 2002142024.663.58$3,502
Apr 2002282023.653.51$6,669
Mar 2002142022.003.10$3,124
Feb 2002143018.222.38$2,605
Jan 2002147017.172.38$2,524
Dec 2001245016.932.36$4,148
Nov 2001140018.072.41$2,530
Oct 2001274019.782.53$5,420
Sep 2001146024.262.25$3,542
Aug 2001135024.873.05$3,357
Jul 2001273023.933.20$6,533
Jun 2001140024.563.82$3,438
May 2001139025.524.31$3,547
Apr 2001273024.685.34$6,738
Mar 2001145024.545.38$3,558
Feb 2001145027.755.77$4,024
Jan 2001277027.478.40$7,609
Dec 2000146026.889.12$3,924
Nov 2000277032.215.66$8,922
Oct 2000157031.235.15$4,903
Sep 2000137031.875.19$4,366
Aug 2000280029.644.54$8,299
Jul 2000141028.534.09$4,023
Jun 2000139029.304.40$4,073
May 2000282027.263.68$7,687
Apr 2000144024.513.12$3,529
Mar 2000278028.422.86$7,901
Feb 2000138027.622.73$3,812
Jan 2000267025.272.48$6,747
Dec 1999279024.282.42$6,774
Nov 1999142023.192.43$3,293
Oct 1999300020.982.80$6,294
Sep 1999140021.752.62$3,045
Aug 1999228019.262.88$4,391
Jul 1999272017.892.37$4,866
Jun 1999142015.942.36$2,263
May 1999271015.792.32$4,279
Apr 1999136015.102.21$2,054
Mar 1999286012.471.84$3,566
Feb 199912709.981.82$1,267
Jan 1999283010.381.90$2,938
Dec 199828709.201.77$2,640
Nov 1998147010.892.19$1,601
Oct 1998285012.421.97$3,540
Sep 1998279012.592.08$3,513
Aug 1998139011.301.91$1,571
Jul 1998276011.742.24$3,240
Jun 1998139011.242.24$1,562
May 1998268012.622.21$3,382
Apr 1998289013.042.51$3,769
Mar 1998145012.802.31$1,856
Feb 1998281013.952.30$3,920
Jan 1998281014.702.15$4,131
Dec 1997279016.322.41$4,553
Nov 1997142018.193.09$2,583
Oct 1997273019.253.15$5,255
Sep 1997264017.742.95$4,683
Aug 1997275017.862.55$4,912
Jul 1997274017.582.25$4,817
Jun 1997284017.242.26$4,896
May 1997135018.972.31$2,561
Apr 1997280017.882.08$5,006
Mar 1997238018.951.94$4,510
Feb 1997277020.492.21$5,676
Jan 1997281023.483.54$6,598
Dec 1996278023.32$6,483
Nov 1996285021.97$6,261
Oct 1996296023.31$6,900
Sep 1996301022.22$6,688
Aug 1996289020.26$5,855
Jul 1996299019.55$5,845
Jun 1996143018.73$2,678
May 1996300019.43$5,829
Apr 1996306021.51$6,582
Mar 1996310019.38$6,008
Feb 1996150016.98$2,547
Jan 1996294017.07$5,019
Dec 1995306017.19$5,260
Nov 1995302016.00$4,832
Oct 1995156015.43$2,407
Sep 1995278016.18$4,498
Aug 1995299015.92$4,760
Jul 1995286015.24$4,359
Jun 1995306016.41$5,021
May 1995303017.56$5,321
Apr 1995279117.73$4,947
Mar 1995305116.44$5,014
Feb 1995310116.58$5,140
Jan 1995296115.92$4,712
Dec 1994302115.03$4,539
Nov 1994304115.90$4,834
Oct 1994298115.58$4,643
Sep 1994284115.29$4,342
Aug 1994304116.13$4,904
Jul 1994305117.56$5,356
Jun 1994296117.09$5,059
May 1994288115.88$4,573
Apr 1994303114.14$4,284
Mar 1994311112.46$3,875
Feb 1994295112.50$3,688
Jan 1994309112.66$3,912
Dec 1993307112.33$3,785
Nov 1993275114.49$3,985
Oct 1993422115.85$6,689
Sep 1993297115.03$4,464
Aug 1993298115.66$4,667
Jul 1993296115.46$4,576
Jun 1993429116.79$7,203
May 1993303117.68$5,357
Apr 1993308118.05$5,559
Mar 1993306118.14$5,551
Feb 1993447117.90$8,001
Jan 1993308116.93$5,214

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.

Mar 2025 — as filed, then multipliedworked
Oil                  331 bbl  × $ 67.70 =    $22,409
Casinghead gas         0 Mcf  × $  4.27 =         $0

────────────────────────────────────────────────────
Month total                                  $22,409

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/4611 is the state's own key, not one this site invented.