ROBERTSON

Operated by CASTILLO OIL COMPANY LLC (P-5 139634) in the SALT FLAT, WEST field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 8806District 01Field 79912100Hydrogen sulphide fieldOilCasinghead gasSaveExport
Value, all time
$2.0 M
Jan 1993 – May 2026
Value, last 12 filed months
$35 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 141 leases and 399 wells, and the rule below applies to all of them.

Discovered
1981-03-01
as the register files it
Field class
Oil
the register's own label
Between wells
300 ft
minimum
From a lease line
150 ft
minimum

A drilling unit in this field needs at least 2.06 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: 2.06 OP ACRES - 500' DIAG

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
OilDisposition39,846 bbl$1,890,239
Casinghead gasProduction36,204 Mcf$108,698
Total$1,998,937

11,346 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 (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 29.7306, -97.6446. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.4 miles.

29.73067, -97.64416 · 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
2,541 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 2,408 and 2,642 ft, median 2,541 ft, over the 5 wells that filed a depth.

Completions filed
Mar 1983 – Jan 1986
5 of 5 wells

5 wells

42-0553406552,408 ftJan 1986
42-0553385742,510 ftApr 1985
42-0553375932,541 ftFeb 1985
42-0553337922,642 ftNov 1983
42-0553308712,638 ftMar 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 20260098.932.87$0
Mar 2026168089.753.15$15,078
Feb 20260063.503.75$0
Jan 20260059.138.00$0
Dec 20250056.664.41$0
Nov 2025161058.593.93$9,433
Oct 20250059.383.30$0
Sep 20250062.743.08$0
Aug 20250063.933.01$0
Jul 2025158066.743.32$10,545
Jun 20250066.483.13$0
May 20250060.553.23$0
Apr 2025173062.363.54$10,788
Mar 20250067.704.27$0
Feb 20250070.884.34$0
Jan 20250074.324.28$0
Dec 2024177068.993.12$12,211
Nov 20240069.052.20$0
Oct 20240071.372.28$0
Sep 20240069.612.36$0
Aug 2024172075.632.06$13,008
Jul 20240079.932.15$0
Jun 20240078.082.63$0
May 2024168078.812.20$13,240
Apr 20240084.451.66$0
Mar 20240080.301.55$0
Feb 2024173076.091.78$13,164
Jan 20240073.023.30$0
Dec 20230071.262.61$0
Nov 20230077.892.81$0
Oct 2023164085.443.09$14,012
Sep 20230089.042.74$0
Aug 20230080.522.67$0
Jul 2023164074.852.64$12,275
Jun 20230068.962.26$0
May 2023174070.622.23$12,288
Apr 20230078.122.24$0
Mar 20230072.852.39$0
Feb 20230075.112.47$0
Jan 2023158076.533.39$12,092
Dec 20220076.415.73$0
Nov 20220085.005.65$0
Oct 2022162087.185.86$14,123
Sep 20220084.888.16$0
Aug 20220094.529.13$0
Jul 20221620101.587.54$16,456
Jun 202200115.097.98$0
May 20221630109.378.43$17,827
Apr 202200104.226.84$0
Mar 202200108.885.08$0
Feb 2022165091.054.86$15,023
Jan 20220081.844.54$0
Dec 20210071.323.90$0
Nov 2021161077.435.24$12,466
Oct 20210079.795.71$0
Sep 20210069.865.35$0
Aug 2021164066.024.22$10,827
Jul 20210070.783.98$0
Jun 20210069.493.38$0
May 20210063.483.02$0
Apr 2021158060.362.76$9,537
Mar 20210061.302.72$0
Feb 2021167057.805.55$9,653
Jan 20210050.412.81$0
Dec 20200044.642.68$0
Nov 2020165038.772.71$6,397
Oct 20200036.972.48$0
Sep 20200037.091.99$0
Aug 2020167039.982.39$6,677
Jul 20200038.371.83$0
Jun 20200034.901.69$0
May 20200016.921.81$0
Apr 2020167014.751.80$2,463
Mar 20200030.341.86$0
Feb 20200049.881.98$0
Jan 2020165057.252.09$9,446
Dec 20190059.012.30$0
Nov 20190055.302.75$0
Oct 2019164053.472.42$8,769
Sep 20190055.052.66$0
Aug 20190053.112.30$0
Jul 2019167056.272.46$9,397
Jun 20190052.782.49$0
May 2019166058.482.74$9,708
Apr 20190062.632.75$0
Mar 20190056.803.06$0
Feb 20190050.852.79$0
Jan 2019162046.033.23$7,457
Dec 20180046.594.19$0
Nov 20180052.934.24$0
Oct 20180061.443.40$0
Sep 2018166059.543.11$9,884
Aug 20180059.403.07$0
Jul 2018167065.142.93$10,878
Jun 20180060.183.08$0
May 2018174065.382.90$11,376
Apr 20180063.842.90$0
Mar 2018165061.222.79$10,101
Feb 20180061.782.77$0
Jan 20180062.874.01$0
Dec 2017170057.272.92$9,736
Nov 20170055.423.12$0
Oct 20170049.292.98$0
Sep 2017179047.523.09$8,506
Aug 20170045.373.00$0
Jul 2017178043.873.09$7,809
Jun 20170042.493.09$0
May 20170045.373.26$0
Apr 2017164047.933.21$7,861
Mar 20170046.772.98$0
Feb 2017178050.452.95$8,980
Jan 20170049.413.42$0
Dec 20160048.763.72$0
Nov 2016163042.492.64$6,926
Oct 20160046.193.09$0
Sep 2016170041.553.10$7,064
Aug 20160041.442.92$0
Jul 2016163041.622.92$6,784
Jun 20160045.352.69$0
May 2016165042.521.99$7,016
Apr 20160036.561.99$0
Mar 201616025133.011.79$5,732
Feb 2016031426.472.06$648
Jan 2016033827.352.36$799
Dec 201516718332.362.00$5,770
Nov 2015024338.792.17$527
Oct 2015164043.552.43$7,142
Sep 2015025442.992.76$701
Aug 2015164040.162.87$6,586
Jul 2015027948.152.95$822
Jun 201516029356.152.88$9,829
May 2015155055.212.96$8,558
Apr 20150049.822.71$0
Mar 201516530942.892.93$7,984
Feb 2015029444.662.98$875
Jan 201516331143.433.10$8,043
Dec 2014033954.693.59$1,217
Nov 201416335770.464.25$13,003
Oct 2014036478.303.90$1,420
Sep 201416231286.164.05$15,220
Aug 2014030289.394.04$1,219
Jul 201415926996.564.18$16,477
Jun 2014027998.164.74$1,322
May 201416734594.734.73$17,451
Apr 2014030995.944.81$1,486
Mar 201416835895.895.06$17,920
Feb 2014032597.406.19$2,012
Jan 201416627790.404.86$16,353
Dec 2013017791.824.35$771
Nov 201316819988.853.74$15,671
Oct 2013020397.423.78$767
Sep 2013164228104.113.72$17,922
Aug 20130262104.253.52$923
Jul 2013166224102.523.72$17,851
Jun 201316524294.403.93$16,528
May 2013024394.834.15$1,008
Apr 201316522693.964.28$16,471
Mar 2013016193.623.91$630
Feb 2013166091.233.42$15,144
Jan 2013168091.603.42$15,389
Dec 2012013586.773.42$462
Nov 201216716986.953.62$15,133
Oct 2012012089.383.40$408
Sep 201216717094.672.92$16,306
Aug 201216512192.662.91$15,641
Jul 201209885.133.02$296
Jun 201216514679.822.52$13,538
May 201216510791.612.49$15,382
Apr 20120113101.652.00$226
Mar 201216495105.052.22$17,439
Feb 20120160101.102.57$411
Jan 201217316698.092.73$17,423
Dec 201116210396.873.24$16,027
Nov 2011016895.723.31$556
Oct 201115021484.983.65$13,528
Sep 2011019983.623.99$793
Aug 201116724183.404.15$14,928
Jul 201116523494.144.52$16,590
Jun 2011024792.904.64$1,146
May 201116623598.134.40$17,325
Apr 2011167195105.964.33$18,540
Mar 2011017596.364.06$710
Feb 201116713185.644.18$14,849
Jan 201133216886.504.59$29,489
Dec 2010017985.734.35$778
Nov 2010017480.843.80$660
Oct 201016517778.103.51$13,508
Sep 201016416372.633.98$12,560
Aug 2010025373.684.42$1,118
Jul 201016024272.554.74$12,754
Jun 201016426670.364.91$12,845
May 201016624171.124.24$12,827
Apr 201016426081.694.12$14,469
Mar 201016226478.394.39$13,858
Feb 2010020073.585.44$1,088
Jan 201016615174.365.96$13,244
Dec 200916411371.445.48$12,336
Nov 200916515874.593.75$12,900
Oct 2009022372.544.11$917
Sep 200916466665.543.06$12,790
Aug 200916260667.423.22$12,872
Jul 200916557661.133.46$12,082
Jun 2009041466.163.90$1,613
May 200916843554.743.93$10,904
Apr 200916637746.773.59$9,116
Mar 2009032942.144.06$1,335
Feb 200916514732.814.63$6,095
Jan 200916518335.865.37$6,900
Dec 2008019037.105.98$1,136
Nov 200816217755.496.86$10,204
Oct 200816218875.246.92$13,490
Sep 2008162119101.767.88$17,422
Aug 2008165262114.228.48$21,069
Jul 20080256131.0811.39$2,916
Jun 2008155217131.3313.03$23,184
May 2008163231123.1711.57$22,750
Apr 20080211110.3110.45$2,206
Mar 2008166221101.909.66$19,051
Feb 200816721192.538.77$17,303
Jan 200816719490.388.21$16,685
Dec 2007165088.337.30$14,574
Nov 20070091.677.29$0
Oct 2007166082.856.92$13,753
Sep 2007160075.846.24$12,134
Aug 2007166069.066.39$11,464
Jul 2007160070.906.39$11,344
Jun 200716624962.007.55$12,172
May 200715435658.747.85$11,839
Apr 20070059.617.81$0
Mar 2007160056.927.30$9,107
Feb 2007166055.108.22$9,147
Jan 20070050.306.73$0
Dec 2006207056.656.92$11,727
Nov 20060054.207.62$0
Oct 20060054.906.01$0
Sep 2006165060.085.04$9,913
Aug 2006164068.717.34$11,268
Jul 20060069.376.34$0
Jun 200665066.286.38$4,308
May 2006121066.016.42$7,987
Apr 2006162064.397.36$10,431
Mar 20060056.707.08$0
Feb 2006102057.597.75$5,874
Jan 2006168060.598.93$10,179
Dec 20050054.9413.42$0
Nov 2005128054.6910.59$7,000
Oct 20050058.3413.80$0
Sep 2005112061.4512.08$6,882
Aug 2005171061.519.80$10,518
Jul 20050055.697.84$0
Jun 2005157052.337.38$8,216
May 200597045.226.65$4,386
Apr 200549049.207.36$2,411
Mar 2005143050.377.15$7,203
Feb 2005117045.226.31$5,291
Jan 2005129043.166.32$5,568
Dec 20047023839.866.75$4,397
Nov 2004128045.286.33$5,796
Oct 2004165049.706.52$8,201
Sep 2004165043.245.28$7,135
Aug 2004164042.375.55$6,949
Jul 2004157038.286.08$6,010
Jun 2004165036.106.43$5,957
May 2004165037.486.49$6,184
Apr 2004166034.475.86$5,722
Mar 2004176034.365.53$6,047
Feb 20040032.455.51$0
Jan 2004170032.036.30$5,445
Dec 2003172030.266.30$5,205
Nov 2003177028.804.60$5,098
Oct 2003171028.174.76$4,817
Sep 2003174026.314.75$4,578
Aug 2003175029.765.13$5,208
Jul 2003327029.415.17$9,617
Jun 2003179028.565.98$5,112
May 2003164026.595.97$4,361
Apr 2003174026.675.41$4,641
Mar 200398031.146.10$3,052
Feb 2003179033.487.93$5,993
Jan 2003149030.315.58$4,516
Dec 2002174026.914.85$4,682
Nov 2002241024.664.14$5,943
Oct 2002234026.464.23$6,192
Sep 2002166027.443.64$4,555
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 2002101022.003.10$2,222
Feb 20020018.222.38$0
Jan 20020017.172.38$0
Dec 2001237016.932.36$4,012
Nov 200119018.072.41$343
Oct 2001234019.782.53$4,629
Sep 2001199024.262.25$4,828
Aug 20010024.873.05$0
Jul 2001211023.933.20$5,049
Jun 2001225024.563.82$5,526
May 2001131025.524.31$3,343
Apr 20010024.685.34$0
Mar 2001177024.545.38$4,344
Feb 2001117027.755.77$3,247
Jan 20010027.478.40$0
Dec 2000140026.889.12$3,763
Nov 2000163032.215.66$5,250
Oct 200097031.235.15$3,029
Sep 20000031.875.19$0
Aug 20000029.644.54$0
Jul 20000028.534.09$0
Jun 20000029.304.40$0
May 20000027.263.68$0
Apr 20000024.513.12$0
Mar 2000152028.422.86$4,320
Feb 20000027.622.73$0
Jan 20000025.272.48$0
Dec 19990024.282.42$0
Nov 1999355023.192.43$8,232
Oct 19990020.982.80$0
Sep 19990021.752.62$0
Aug 19990019.262.88$0
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 199902410.381.90$46
Dec 199801049.201.77$184
Nov 199816724810.892.19$2,361
Oct 1998194012.421.97$2,409
Sep 1998337012.592.08$4,243
Aug 19980011.301.91$0
Jul 19980011.742.24$0
Jun 19980011.242.24$0
May 19980012.622.21$0
Apr 199802213.042.51$55
Mar 19980012.802.31$0
Feb 199803913.952.30$90
Jan 1998177014.702.15$2,602
Dec 199703316.322.41$80
Nov 199705218.193.09$161
Oct 19971756319.253.15$3,567
Sep 19971678517.742.95$3,214
Aug 199717311817.862.55$3,391
Jul 199717210517.582.25$3,260
Jun 199717311717.242.26$3,247
May 199717716918.972.31$3,748
Apr 1997181517.882.08$3,247
Mar 199712018818.951.94$2,639
Feb 199717922820.492.21$4,171
Jan 199727016123.483.54$6,909
Dec 199617220323.32$4,011
Nov 1996010321.97$0
Oct 19961808423.31$4,196
Sep 199605622.22$0
Aug 199617331720.26$3,505
Jul 199617931719.55$3,499
Jun 199617432918.73$3,259
May 199634935819.43$6,781
Apr 1996029721.51$0
Mar 199634828419.38$6,744
Feb 1996031716.98$0
Jan 199617729817.07$3,021
Dec 199517325017.19$2,974
Nov 199517335816.00$2,768
Oct 1995176815.43$2,716
Sep 199517910816.18$2,896
Aug 199517423515.92$2,770
Jul 199517728315.24$2,697
Jun 199517326416.41$2,839
May 199517233617.56$3,020
Apr 199517431717.73$3,085
Mar 199517416216.44$2,861
Feb 199517623316.58$2,918
Jan 199535432615.92$5,636
Dec 199418045115.03$2,705
Nov 199414019615.90$2,226
Oct 199417218615.58$2,680
Sep 199417417515.29$2,660
Aug 199417726316.13$2,855
Jul 199417331317.56$3,038
Jun 199435822717.09$6,118
May 199417526215.88$2,779
Apr 199417727914.14$2,503
Mar 199435129412.46$4,373
Feb 199417921412.50$2,238
Jan 199417617412.66$2,228
Dec 199317936712.33$2,207
Nov 199317619314.49$2,550
Oct 199333722615.85$5,341
Sep 199317418815.03$2,615
Aug 199317031415.66$2,662
Jul 199317721815.46$2,736
Jun 199317220216.79$2,888
May 19933408917.68$6,011
Apr 199317917618.05$3,231
Mar 199335216118.14$6,385
Feb 199318218917.90$3,258
Jan 199317614616.93$2,980

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 2026 — as filed, then multipliedworked
Oil                  168 bbl  × $ 89.75 =    $15,078
Casinghead gas         0 Mcf  × $  3.15 =         $0

────────────────────────────────────────────────────
Month total                                  $15,078

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/8806 is the state's own key, not one this site invented.