SWENSON RANCH

Operated by CULEBRA OIL & GAS, LLC (P-5 192452) in the FLAT TOP 166 (CISCO 3800) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 12735District 7BField 31376666OilCasinghead gasSaveExport
Value, all time
$2.8 M
Jan 1993 – May 2026
Value, last 12 filed months
$89 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 3 leases and 5 wells, and the rule below applies to all of them.

Discovered
1961-07-10
as the register files it
Field class
Oil
the register's own label
Between wells
1,200 ft
minimum
From a lease line
660 ft
minimum

A drilling unit in this field needs at least 40 acres.

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
OilDisposition57,225 bbl$2,801,051
Casinghead gasProduction167 Mcf$553
Total$2,801,604

48 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 (1)

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 33.0386, -100.0951. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.0 miles.

33.03855, -100.09506 · 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 1 wells
With a plug date
0.0%
0 of 1 wells
Median depth
4,004 ft
1 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.
1100.0%

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

The one well that filed a depth was drilled to 4,004 ft.

Completions filed
Sep 1975
1 of 1 wells

1 well

42-4333035814,004 ftSep 1975

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 2026176098.932.87$17,412
Mar 2026181089.753.15$16,245
Feb 20260063.503.75$0
Jan 2026176059.138.00$10,407
Dec 20250056.664.41$0
Nov 2025180058.593.93$10,546
Oct 2025178059.383.30$10,570
Sep 20250062.743.08$0
Aug 2025178063.933.01$11,380
Jul 20250066.743.32$0
Jun 2025181066.483.13$12,033
May 2025176060.553.23$10,657
Apr 2025178062.363.54$11,100
Mar 2025181067.704.27$12,254
Feb 20250070.884.34$0
Jan 2025179074.324.28$13,303
Dec 20240068.993.12$0
Nov 2024181069.052.20$12,498
Oct 2024180071.372.28$12,847
Sep 20240069.612.36$0
Aug 2024180075.632.06$13,613
Jul 20240079.932.15$0
Jun 2024173078.082.63$13,508
May 2024177078.812.20$13,949
Apr 20240084.451.66$0
Mar 2024176080.301.55$14,133
Feb 2024183076.091.78$13,924
Jan 20240073.023.30$0
Dec 2023176071.262.61$12,542
Nov 2023182077.892.81$14,176
Oct 20230085.443.09$0
Sep 2023179089.042.74$15,938
Aug 20230080.522.67$0
Jul 2023164074.852.64$12,275
Jun 2023173068.962.26$11,930
May 2023167070.622.23$11,794
Apr 2023180078.122.24$14,062
Mar 20230072.852.39$0
Feb 20230075.112.47$0
Jan 2023172076.533.39$13,163
Dec 2022176076.415.73$13,448
Nov 2022176085.005.65$14,960
Oct 20220087.185.86$0
Sep 2022166084.888.16$14,090
Aug 2022174094.529.13$16,446
Jul 202200101.587.54$0
Jun 20221710115.097.98$19,680
May 20221730109.378.43$18,921
Apr 202200104.226.84$0
Mar 20221740108.885.08$18,945
Feb 2022179091.054.86$16,298
Jan 20220081.844.54$0
Dec 2021171071.323.90$12,196
Nov 2021176077.435.24$13,628
Oct 2021173079.795.71$13,804
Sep 20210069.865.35$0
Aug 2021167066.024.22$11,025
Jul 2021172070.783.98$12,174
Jun 2021164069.493.38$11,396
May 20210063.483.02$0
Apr 2021172060.362.76$10,382
Mar 2021172061.302.72$10,544
Feb 20210057.805.55$0
Jan 2021176050.412.81$8,872
Dec 2020172044.642.68$7,678
Nov 20200038.772.71$0
Oct 2020175036.972.48$6,470
Sep 2020165037.091.99$6,120
Aug 2020170039.982.39$6,797
Jul 2020170038.371.83$6,523
Jun 2020170034.901.69$5,933
May 2020170016.921.81$2,876
Apr 20200014.751.80$0
Mar 2020168030.341.86$5,097
Feb 20200049.881.98$0
Jan 2020174057.252.09$9,962
Dec 2019174059.012.30$10,268
Nov 20190055.302.75$0
Oct 2019174053.472.42$9,304
Sep 2019174055.052.66$9,579
Aug 20190053.112.30$0
Jul 2019174056.272.46$9,791
Jun 2019177052.782.49$9,342
May 20190058.482.74$0
Apr 2019175062.632.75$10,960
Mar 2019174056.803.06$9,883
Feb 2019180050.852.79$9,153
Jan 20190046.033.23$0
Dec 2018174046.594.19$8,107
Nov 2018177052.934.24$9,369
Oct 20180061.443.40$0
Sep 2018171059.543.11$10,181
Aug 2018164059.403.07$9,742
Jul 20180065.142.93$0
Jun 2018165060.183.08$9,930
May 2018168065.382.90$10,984
Apr 20180063.842.90$0
Mar 2018169061.222.79$10,346
Feb 2018168061.782.77$10,379
Jan 2018163062.874.01$10,248
Dec 20170057.272.92$0
Nov 2017162055.423.12$8,978
Oct 2017163049.292.98$8,034
Sep 20170047.523.09$0
Aug 2017165045.373.00$7,486
Jul 2017165043.873.09$7,239
Jun 2017163042.493.09$6,926
May 20170045.373.26$0
Apr 2017173047.933.21$8,292
Mar 2017173046.772.98$8,091
Feb 2017168050.452.95$8,476
Jan 20170049.413.42$0
Dec 2016172048.763.72$8,387
Nov 2016159042.492.64$6,756
Oct 2016165046.193.09$7,621
Sep 201614041.553.10$582
Aug 2016168041.442.92$6,962
Jul 2016165041.622.92$6,867
Jun 2016166045.352.69$7,528
May 20160042.521.99$0
Apr 2016176036.561.99$6,435
Mar 2016177033.011.79$5,843
Feb 20160026.472.06$0
Jan 2016175027.352.36$4,786
Dec 2015165032.362.00$5,339
Nov 2015176038.792.17$6,827
Oct 2015166043.552.43$7,229
Sep 2015166042.992.76$7,136
Aug 2015168040.162.87$6,747
Jul 2015174048.152.95$8,378
Jun 2015174056.152.88$9,770
May 20150055.212.96$0
Apr 2015165049.822.71$8,220
Mar 2015177042.892.93$7,592
Feb 2015170044.662.98$7,592
Jan 20150043.433.10$0
Dec 2014175054.693.59$9,571
Nov 2014175070.464.25$12,331
Oct 20140078.303.90$0
Sep 2014175086.164.05$15,078
Aug 2014179089.394.04$16,001
Jul 20140096.564.18$0
Jun 2014177098.164.74$17,374
May 2014178094.734.73$16,862
Apr 20140095.944.81$0
Mar 2014177095.895.06$16,973
Feb 2014180097.406.19$17,532
Jan 20140090.404.86$0
Dec 2013179091.824.35$16,436
Nov 2013179088.853.74$15,904
Oct 2013179097.423.78$17,438
Sep 20131740104.113.72$18,115
Aug 201300104.253.52$0
Jul 20131800102.523.72$18,454
Jun 2013175094.403.93$16,520
May 2013174094.834.15$16,500
Apr 2013179093.964.28$16,819
Mar 20130093.623.91$0
Feb 2013174091.233.42$15,874
Jan 2013177091.603.42$16,213
Dec 2012176086.773.42$15,272
Nov 2012177086.953.62$15,390
Oct 2012179089.383.40$15,999
Sep 2012179094.672.92$16,946
Aug 2012175092.662.91$16,216
Jul 2012176085.133.02$14,983
Jun 2012170079.822.52$13,569
May 20120091.612.49$0
Apr 20121770101.652.00$17,992
Mar 20121770105.052.22$18,594
Feb 20121790101.102.57$18,097
Jan 20120098.092.73$0
Dec 2011180096.873.24$17,437
Nov 20110095.723.31$0
Oct 2011176084.983.65$14,956
Sep 20110083.623.99$0
Aug 201144083.404.15$3,670
Jul 2011176094.144.52$16,569
Jun 2011176092.904.64$16,350
May 2011175098.134.40$17,173
Apr 201100105.964.33$0
Mar 2011176096.364.06$16,959
Feb 2011178085.644.18$15,244
Jan 2011130086.504.59$11,245
Dec 20100085.734.35$0
Nov 2010180080.843.80$14,551
Oct 2010179078.103.51$13,980
Sep 20100072.633.98$0
Aug 2010177073.684.42$13,041
Jul 2010176072.554.74$12,769
Jun 2010178070.364.91$12,524
May 20100071.124.24$0
Apr 2010180081.694.12$14,704
Mar 2010179078.394.39$14,032
Feb 2010168073.585.44$12,361
Jan 2010175074.365.96$13,013
Dec 20090071.445.48$0
Nov 2009169074.593.75$12,606
Oct 2009178072.544.11$12,912
Sep 2009166065.543.06$10,880
Aug 2009165067.423.22$11,124
Jul 20090061.133.46$0
Jun 2009177066.163.90$11,710
May 2009176054.743.93$9,634
Apr 2009179046.773.59$8,372
Mar 20090042.144.06$0
Feb 2009170032.814.63$5,578
Jan 2009177035.865.37$6,347
Dec 2008181037.105.98$6,715
Nov 2008181055.496.86$10,044
Oct 20080075.246.92$0
Sep 20081780101.767.88$18,113
Aug 20081790114.228.48$20,445
Jul 20081780131.0811.39$23,332
Jun 20081800131.3313.03$23,639
May 20081760123.1711.57$21,678
Apr 20081740110.3110.45$19,194
Mar 200800101.909.66$0
Feb 2008104092.538.77$9,623
Jan 2008175090.388.21$15,817
Dec 2007179088.337.30$15,811
Nov 2007176091.677.29$16,134
Oct 2007179082.856.92$14,830
Sep 20070075.846.24$0
Aug 2007352069.066.39$24,309
Jul 20070070.906.39$0
Jun 2007176062.007.55$10,912
May 2007180058.747.85$10,573
Apr 2007178059.617.81$10,611
Mar 2007179056.927.30$10,189
Feb 2007180055.108.22$9,918
Jan 2007180050.306.73$9,054
Dec 2006180056.656.92$10,197
Nov 2006183154.207.62$9,926
Oct 20060154.906.01$6
Sep 2006180160.085.04$10,819
Aug 2006182168.717.34$12,513
Jul 2006176169.376.34$12,215
Jun 20060166.286.38$6
May 2006180166.016.42$11,888
Apr 2006179164.397.36$11,533
Mar 2006176156.707.08$9,986
Feb 2006178157.597.75$10,259
Jan 2006175160.598.93$10,612
Dec 2005177154.9413.42$9,738
Nov 20050154.6910.59$11
Oct 2005175158.3413.80$10,223
Sep 2005347161.4512.08$21,335
Aug 20050161.519.80$10
Jul 2005175155.697.84$9,754
Jun 2005173152.337.38$9,060
May 2005176145.226.65$7,965
Apr 2005173149.207.36$8,519
Mar 2005175150.377.15$8,822
Feb 20050145.226.31$6
Jan 2005180143.166.32$7,775
Dec 2004179139.866.75$7,142
Nov 2004181145.286.33$8,202
Oct 2004176149.706.52$8,754
Sep 2004177143.245.28$7,659
Aug 2004175142.375.55$7,420
Jul 2004176138.286.08$6,743
Jun 2004177136.106.43$6,396
May 20040137.486.49$6
Apr 2004177134.475.86$6,107
Mar 2004174134.365.53$5,984
Feb 2004179132.455.51$5,814
Jan 20040132.036.30$6
Dec 2003357130.266.30$10,809
Nov 20030128.804.60$5
Oct 2003181128.174.76$5,104
Sep 2003179126.314.75$4,714
Aug 2003179129.765.13$5,332
Jul 2003177129.415.17$5,211
Jun 2003180128.565.98$5,147
May 2003182126.595.97$4,845
Apr 2003181126.675.41$4,833
Mar 2003186131.146.10$5,798
Feb 20030133.487.93$8
Jan 2003186130.315.58$5,643
Dec 2002186126.914.85$5,010
Nov 2002172124.664.14$4,246
Oct 2002176126.464.23$4,661
Sep 2002157127.443.64$4,312
Aug 20020125.963.16$3
Jul 2002175124.583.06$4,305
Jun 2002163123.733.34$3,871
May 2002161124.663.58$3,974
Apr 2002131123.653.51$3,102
Mar 2002168122.003.10$3,699
Feb 20020118.222.38$2
Jan 2002181117.172.38$3,110
Dec 2001183116.932.36$3,101
Nov 2001178118.072.41$3,219
Oct 2001150119.782.53$2,970
Sep 2001159124.262.25$3,860
Aug 2001149124.873.05$3,709
Jul 20010123.933.20$3
Jun 2001153124.563.82$3,762
May 2001182125.524.31$4,649
Apr 2001177124.685.34$4,374
Mar 20010124.545.38$5
Feb 2001157127.755.77$4,363
Jan 20010127.478.40$8
Dec 2000153126.889.12$4,122
Nov 2000167132.215.66$5,385
Oct 2000166131.235.15$5,189
Sep 2000167131.875.19$5,327
Aug 2000170129.644.54$5,043
Jul 2000154128.534.09$4,398
Jun 2000173129.304.40$5,073
May 2000165127.263.68$4,502
Apr 2000174124.513.12$4,268
Mar 2000174128.422.86$4,948
Feb 2000126127.622.73$3,483
Jan 2000141125.272.48$3,566
Dec 1999178124.282.42$4,324
Nov 1999158123.192.43$3,666
Oct 1999168120.982.80$3,527
Sep 1999147121.752.62$3,200
Aug 1999156119.262.88$3,007
Jul 1999172117.892.37$3,079
Jun 1999179115.942.36$2,856
May 1999165115.792.32$2,608
Apr 1999150115.102.21$2,267
Mar 1999156112.471.84$1,947
Feb 199931019.981.82$3,096
Jan 19990110.381.90$2
Dec 199817219.201.77$1,584
Nov 1998179110.892.19$1,952
Oct 1998179112.421.97$2,225
Sep 1998167112.592.08$2,105
Aug 1998338111.301.91$3,821
Jul 1998179111.742.24$2,104
Jun 1998175111.242.24$1,969
May 1998179112.622.21$2,261
Apr 1998174113.042.51$2,271
Mar 1998180112.802.31$2,306
Feb 1998180113.952.30$2,513
Jan 1998183114.702.15$2,692
Dec 1997181116.322.41$2,956
Nov 1997168118.193.09$3,059
Oct 1997179119.253.15$3,449
Sep 1997179117.742.95$3,178
Aug 1997172117.862.55$3,074
Jul 1997178117.582.25$3,131
Jun 1997178117.242.26$3,071
May 1997181118.972.31$3,436
Apr 1997180117.882.08$3,220
Mar 1997182118.951.94$3,451
Feb 1997179120.492.21$3,670
Jan 1997181123.483.54$4,253
Dec 1996180123.32$4,198
Nov 19960121.97$0
Oct 1996356123.31$8,298
Sep 19960122.22$0
Aug 1996180120.26$3,647
Jul 1996177119.55$3,460
Jun 1996177118.73$3,315
May 1996177119.43$3,439
Apr 1996181121.51$3,893
Mar 1996364119.38$7,054
Feb 19960116.98$0
Jan 1996183117.07$3,124
Dec 1995179117.19$3,077
Nov 1995358116.00$5,728
Oct 1995180115.43$2,777
Sep 19950116.18$0
Aug 1995179115.92$2,850
Jul 1995341115.24$5,197
Jun 1995174116.41$2,855
May 1995177117.56$3,108
Apr 1995178117.73$3,156
Mar 1995180116.44$2,959
Feb 1995178116.58$2,951
Jan 1995178115.92$2,834
Dec 1994180115.03$2,705
Nov 1994178115.90$2,830
Oct 1994179115.58$2,789
Sep 1994176115.29$2,691
Aug 1994176116.13$2,839
Jul 1994176117.56$3,091
Jun 1994175117.09$2,991
May 1994177115.88$2,811
Apr 1994179114.14$2,531
Mar 1994177112.46$2,205
Feb 1994180112.50$2,250
Jan 1994184112.66$2,329
Dec 1993180112.33$2,219
Nov 1993177114.49$2,565
Oct 1993180115.85$2,853
Sep 1993181115.03$2,720
Aug 1993177115.66$2,772
Jul 1993176115.46$2,721
Jun 1993177116.79$2,972
May 1993355117.68$6,276
Apr 1993178118.05$3,213
Mar 1993179118.14$3,247
Feb 1993182117.90$3,258
Jan 1993180116.93$3,047

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                  176 bbl  × $ 98.93 =    $17,412
Casinghead gas         0 Mcf  × $  2.87 =         $0

────────────────────────────────────────────────────
Month total                                  $17,412

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/12735 is the state's own key, not one this site invented.