COX, MARION HEIRS -A-

Operated by SOUTHWEST GAS SYSTEMS, INC. (P-5 806190) in the BROWN COUNTY REGULAR field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 240District 7BField 12406001OilCasinghead gasSave
Value, all time
$1.2 M
Jan 1993 – May 2026
Value, last 12 filed months
$59 k
at the published price for each month
Months reported
401
no gaps in the span
Streams
2
oil, casinghead gas

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
OilDisposition14,767 bbl$748,768
Casinghead gasProduction135,822 Mcf$477,394
Total$1,226,161

28,955 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 (2)

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.

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 2 wells
With a plug date
0.0%
0 of 2 wells
Median depth
2,230 ft
2 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.
2100.0%

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 2,150 and 2,310 ft, median 2,230 ft, over the 2 wells that filed a depth.

2 wells

42-0498049812,150 ft
42-0498049922,310 ft

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 20260233106.413.05$710
Apr 202610322698.932.87$10,838
Mar 2026021589.753.15$677
Feb 20269521963.503.75$6,854
Jan 2026019259.138.00$1,536
Dec 20258124256.664.41$5,657
Nov 20257422658.593.93$5,223
Oct 2025024359.383.30$803
Sep 202510826262.743.08$7,582
Aug 2025025363.933.01$763
Jul 20258528166.743.32$6,604
Jun 202516627166.483.13$11,884
May 2025028560.553.23$921
Apr 2025030062.363.54$1,063
Mar 202533330267.704.27$23,833
Feb 2025019270.884.34$833
Jan 2025018174.324.28$774
Dec 202417525068.993.12$12,854
Nov 2024026569.052.20$583
Oct 2024029371.372.28$668
Sep 2024029769.612.36$702
Aug 202418527475.632.06$14,557
Jul 2024033579.932.15$719
Jun 2024036678.082.63$964
May 2024013478.812.20$295
Apr 2024019784.451.66$327
Mar 202418210180.301.55$14,771
Feb 2024023976.091.78$426
Jan 2024028473.023.30$937
Dec 2023025871.262.61$674
Nov 202316823677.892.81$13,748
Oct 2023022685.443.09$698
Sep 2023027689.042.74$755
Aug 2023028180.522.67$751
Jul 2023030574.852.64$806
Jun 202317524268.962.26$12,615
May 2023030070.622.23$668
Apr 2023030178.122.24$674
Mar 202317326672.852.39$13,240
Feb 2023017575.112.47$431
Jan 2023027376.533.39$925
Dec 2022023476.415.73$1,341
Nov 2022025585.005.65$1,440
Oct 202217118887.185.86$16,010
Sep 2022025284.888.16$2,057
Aug 2022033694.529.13$3,067
Jul 20220356101.587.54$2,685
Jun 2022178249115.097.98$22,472
May 20220337109.378.43$2,842
Apr 20220291104.226.84$1,990
Mar 20220323108.885.08$1,640
Feb 2022016291.054.86$787
Jan 202217522181.844.54$15,325
Dec 2021033571.323.90$1,306
Nov 2021034377.435.24$1,796
Oct 20210079.795.71$0
Sep 2021178069.865.35$12,435
Aug 20210066.024.22$0
Jul 20210070.783.98$0
Jun 20210069.493.38$0
May 20210063.483.02$0
Apr 20210060.362.76$0
Mar 2021363061.302.72$22,252
Feb 202107257.805.55$399
Jan 2021015350.412.81$430
Dec 202018016444.642.68$8,474
Nov 2020012738.772.71$344
Oct 2020019836.972.48$491
Sep 2020018237.091.99$362
Aug 202018017439.982.39$7,611
Jul 2020016438.371.83$299
Jun 2020013734.901.69$232
May 2020014816.921.81$269
Apr 2020010114.751.80$182
Mar 202018110930.341.86$5,694
Feb 2020016749.881.98$331
Jan 2020020957.252.09$438
Dec 2019022759.012.30$523
Nov 201908855.302.75$242
Oct 20195412153.472.42$3,180
Sep 201917611655.052.66$9,997
Aug 201909253.112.30$212
Jul 201909656.272.46$236
Jun 2019011252.782.49$279
May 20191728558.482.74$10,291
Apr 201909462.632.75$259
Mar 20190056.803.06$0
Feb 201909650.852.79$268
Jan 201918410546.033.23$8,808
Dec 20181808446.594.19$8,738
Nov 2018010352.934.24$436
Oct 201808461.443.40$285
Sep 20181795659.543.11$10,832
Aug 2018010759.403.07$328
Jul 201808065.142.93$235
Jun 201807360.183.08$225
May 201805865.382.90$168
Apr 20181849763.842.90$12,028
Mar 2018010861.222.79$301
Feb 201808961.782.77$246
Jan 201805862.874.01$233
Dec 201707357.272.92$213
Nov 201717910455.423.12$10,244
Oct 2017012349.292.98$367
Sep 2017011947.523.09$367
Aug 2017013345.373.00$400
Jul 201717011943.873.09$7,825
Jun 201709642.493.09$296
May 2017013745.373.26$447
Apr 2017013447.933.21$430
Mar 2017012746.772.98$379
Feb 2017013750.452.95$405
Jan 20171769349.413.42$9,014
Dec 2016011948.763.72$443
Nov 2016013942.492.64$368
Oct 2016016346.193.09$504
Sep 20161749641.553.10$7,527
Aug 2016011841.442.92$345
Jul 2016013241.622.92$386
Jun 201608745.352.69$234
May 201609042.521.99$179
Apr 201607536.561.99$149
Mar 201608333.011.79$149
Feb 2016010726.472.06$221
Jan 2016015127.352.36$357
Dec 201508032.362.00$160
Nov 20150038.792.17$0
Oct 2015020243.552.43$490
Sep 201504242.992.76$116
Aug 201508040.162.87$230
Jul 201517813848.152.95$8,977
Jun 20150656.152.88$17
May 2015014255.212.96$420
Apr 2015029949.822.71$809
Mar 2015031742.892.93$930
Feb 2015022444.662.98$667
Jan 2015020343.433.10$629
Dec 2014015954.693.59$571
Nov 2014016870.464.25$714
Oct 201416012578.303.90$13,016
Sep 2014014586.164.05$587
Aug 2014016889.394.04$678
Jul 2014023696.564.18$986
Jun 201417620598.164.74$18,247
May 2014028794.734.73$1,357
Apr 2014024695.944.81$1,183
Mar 2014033995.895.06$1,714
Feb 2014022597.406.19$1,393
Jan 201417722890.404.86$17,109
Dec 2013025191.824.35$1,093
Nov 2013027188.853.74$1,013
Oct 2013029097.423.78$1,096
Sep 20130276104.113.72$1,026
Aug 2013168265104.253.52$18,447
Jul 20130228102.523.72$848
Jun 2013027994.403.93$1,097
May 2013033394.834.15$1,382
Apr 2013044193.964.28$1,889
Mar 2013035493.623.91$1,385
Feb 201317632291.233.42$17,158
Jan 2013034891.603.42$1,190
Dec 2012031886.773.42$1,088
Nov 2012032786.953.62$1,185
Oct 2012032689.383.40$1,108
Sep 2012025894.672.92$753
Aug 2012034192.662.91$992
Jul 201217234485.133.02$15,682
Jun 2012032179.822.52$809
May 2012027791.612.49$689
Apr 20120298101.652.00$595
Mar 2012186328105.052.22$20,268
Feb 20120335101.102.57$861
Jan 2012019998.092.73$544
Dec 2011033496.873.24$1,082
Nov 2011033495.723.31$1,106
Oct 2011031884.983.65$1,160
Sep 2011033583.623.99$1,335
Aug 201117727783.404.15$15,911
Jul 2011039594.144.52$1,784
Jun 2011034992.904.64$1,619
May 2011037498.134.40$1,647
Apr 20110403105.964.33$1,746
Mar 201119038296.364.06$19,858
Feb 2011027585.644.18$1,149
Jan 2011037286.504.59$1,707
Dec 2010041585.734.35$1,804
Nov 2010032080.843.80$1,215
Oct 2010044678.103.51$1,565
Sep 2010044672.633.98$1,775
Aug 2010042173.684.42$1,861
Jul 201019043272.554.74$15,831
Jun 2010038370.364.91$1,881
May 2010031771.124.24$1,343
Apr 2010040281.694.12$1,657
Mar 2010036778.394.39$1,611
Feb 2010034273.585.44$1,861
Jan 201018535774.365.96$15,886
Dec 2009028671.445.48$1,568
Nov 2009034574.593.75$1,294
Oct 2009037872.544.11$1,554
Sep 2009039265.543.06$1,201
Aug 2009040967.423.22$1,316
Jul 2009042761.133.46$1,479
Jun 200917739866.163.90$13,261
May 2009040154.743.93$1,574
Apr 2009030746.773.59$1,101
Mar 2009040642.144.06$1,648
Feb 2009037232.814.63$1,723
Jan 200919740435.865.37$9,234
Dec 2008036737.105.98$2,194
Nov 2008046255.496.86$3,169
Oct 2008048675.246.92$3,364
Sep 20080324101.767.88$2,552
Aug 20080267114.228.48$2,265
Jul 20080182131.0811.39$2,073
Jun 20080400131.3313.03$5,213
May 2008183404123.1711.57$27,216
Apr 20080377110.3110.45$3,941
Mar 20080390101.909.66$3,769
Feb 2008032092.538.77$2,807
Jan 2008042790.388.21$3,504
Dec 2007044988.337.30$3,279
Nov 2007044591.677.29$3,245
Oct 2007046682.856.92$3,226
Sep 2007043475.846.24$2,710
Aug 200717842769.066.39$15,020
Jul 2007042470.906.39$2,708
Jun 2007043362.007.55$3,268
May 2007037758.747.85$2,958
Apr 2007034559.617.81$2,693
Mar 200719038456.927.30$13,619
Feb 2007035455.108.22$2,908
Jan 2007035050.306.73$2,354
Dec 2006039056.656.92$2,698
Nov 2006035554.207.62$2,704
Oct 2006041154.906.01$2,472
Sep 2006040560.085.04$2,040
Aug 2006042768.717.34$3,134
Jul 200618243769.376.34$15,397
Jun 2006044266.286.38$2,822
May 2006043266.016.42$2,776
Apr 2006041564.397.36$3,055
Mar 200618640056.707.08$13,379
Feb 2006036857.597.75$2,852
Jan 2006042560.598.93$3,797
Dec 2005040754.9413.42$5,460
Nov 2005045054.6910.59$4,765
Oct 2005047758.3413.80$6,581
Sep 200518541561.4512.08$16,381
Aug 2005046661.519.80$4,565
Jul 2005050455.697.84$3,953
Jun 2005044952.337.38$3,314
May 2005041045.226.65$2,727
Apr 2005040049.207.36$2,944
Mar 2005036550.377.15$2,612
Feb 200516834145.226.31$9,749
Jan 2005041443.166.32$2,617
Dec 2004029539.866.75$1,992
Nov 2004033345.286.33$2,108
Oct 2004035049.706.52$2,280
Sep 2004036743.245.28$1,939
Aug 2004034942.375.55$1,937
Jul 2004035338.286.08$2,148
Jun 200417234536.106.43$8,429
May 2004035437.486.49$2,299
Apr 2004039434.475.86$2,308
Mar 2004035834.365.53$1,980
Feb 2004037032.455.51$2,039
Jan 2004035832.036.30$2,255
Dec 200311137830.266.30$5,741
Nov 2003037328.804.60$1,714
Oct 2003042428.174.76$2,018
Sep 200318038226.314.75$6,550
Aug 2003040229.765.13$2,062
Jul 2003038629.415.17$1,996
Jun 2003037828.565.98$2,262
May 2003035426.595.97$2,114
Apr 200318334926.675.41$6,768
Mar 2003038231.146.10$2,329
Feb 2003034233.487.93$2,711
Jan 2003034530.315.58$1,926
Dec 200218437926.914.85$6,791
Nov 2002032924.664.14$1,361
Oct 2002039826.464.23$1,683
Sep 2002028627.443.64$1,040
Aug 2002041025.963.16$1,297
Jul 2002047424.583.06$1,451
Jun 2002050323.733.34$1,679
May 2002049324.663.58$1,767
Apr 200217947223.653.51$5,891
Mar 2002048922.003.10$1,517
Feb 2002044318.222.38$1,052
Jan 200218250017.172.38$4,313
Dec 2001052516.932.36$1,241
Nov 2001051618.072.41$1,241
Oct 2001042719.782.53$1,080
Sep 2001047624.262.25$1,072
Aug 2001038924.873.05$1,188
Jul 2001043523.933.20$1,391
Jun 2001032824.563.82$1,254
May 200117730725.524.31$5,839
Apr 2001039124.685.34$2,086
Mar 2001036924.545.38$1,984
Feb 2001035527.755.77$2,047
Jan 2001038227.478.40$3,208
Dec 2000036726.889.12$3,348
Nov 200016439032.215.66$7,489
Oct 2000040931.235.15$2,105
Sep 2000041231.875.19$2,137
Aug 2000039529.644.54$1,794
Jul 2000042228.534.09$1,726
Jun 200017843329.304.40$7,119
May 2000045027.263.68$1,656
Apr 2000046624.513.12$1,452
Mar 2000048728.422.86$1,393
Feb 200017842927.622.73$6,086
Jan 2000051125.272.48$1,268
Dec 1999046124.282.42$1,117
Nov 1999051023.192.43$1,241
Oct 199917847720.982.80$5,072
Sep 1999047221.752.62$1,236
Aug 1999043819.262.88$1,260
Jul 1999060317.892.37$1,431
Jun 199917543515.942.36$3,817
May 1999058115.792.32$1,349
Apr 1999051315.102.21$1,133
Mar 199913045012.471.84$2,448
Feb 199903849.981.82$698
Jan 199917150710.381.90$2,738
Dec 199805509.201.77$975
Nov 1998048310.892.19$1,056
Oct 1998051512.421.97$1,014
Sep 1998049012.592.08$1,020
Aug 1998054911.301.91$1,047
Jul 199817450911.742.24$3,182
Jun 1998051711.242.24$1,157
May 1998052112.622.21$1,150
Apr 1998051413.042.51$1,288
Mar 1998053512.802.31$1,236
Feb 199817529113.952.30$3,110
Jan 1998039314.702.15$847
Dec 1997040416.322.41$974
Nov 1997046018.193.09$1,421
Oct 1997043019.253.15$1,354
Sep 1997052417.742.95$1,548
Aug 1997052217.862.55$1,334
Jul 1997051717.582.25$1,162
Jun 1997049817.242.26$1,124
May 199716448918.972.31$4,240
Apr 1997048717.882.08$1,014
Mar 1997050818.951.94$985
Feb 199712146020.492.21$3,494
Jan 1997042023.483.54$1,487
Dec 1996043823.32$0
Nov 1996050021.97$0
Oct 1996053623.31$0
Sep 1996069722.22$0
Aug 199617263620.26$3,485
Jul 1996062719.55$0
Jun 1996051918.73$0
May 1996062719.43$0
Apr 1996057821.51$0
Mar 199618054819.38$3,488
Feb 1996049916.98$0
Jan 1996056117.07$0
Dec 199517648517.19$3,025
Nov 1995053316.00$0
Oct 1995060215.43$0
Sep 1995059416.18$0
Aug 199517570015.92$2,786
Jul 1995058115.24$0
Jun 1995059116.41$0
May 199517570117.56$3,073
Apr 1995049917.73$0
Mar 1995060416.44$0
Feb 199517770616.58$2,935
Jan 1995057415.92$0
Dec 199417759715.03$2,660
Nov 1994045815.90$0
Oct 1994050415.58$0
Sep 1994050515.29$0
Aug 1994061216.13$0
Jul 199416777317.56$2,933
Jun 1994059817.09$0
May 1994047415.88$0
Apr 199417554014.14$2,475
Mar 1994054112.46$0
Feb 1994053812.50$0
Jan 199417063012.66$2,152
Dec 1993066512.33$0
Nov 1993065314.49$0
Oct 1993069215.85$0
Sep 1993068315.03$0
Aug 199317670015.66$2,756
Jul 1993069415.46$0
Jun 1993064416.79$0
May 1993070517.68$0
Apr 199317669718.05$3,177
Mar 1993071218.14$0
Feb 199317766017.90$3,168
Jan 1993074416.93$0

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.

May 2026 — as filed, then multipliedworked
Oil                    0 bbl  × $106.41 =         $0
Casinghead gas       233 Mcf  × $  3.05 =       $710

────────────────────────────────────────────────────
Month total                                     $710

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/240 is the state's own key, not one this site invented.