COX

Operated by ZTH OPERATING, LLC (P-5 953400) in the EAST TEXAS field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 6438District 6EField 27302001OilCasinghead gasSaveExport
Value, all time
$5.1 M
Jan 1993 – May 2026
Value, last 12 filed months
$136 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 2,264 leases and 17,267 wells, and the rule below applies to all of them.

Discovered
1930-12-31
as the register files it
Field class
Oil
the register's own label
Between wells
330 ft
minimum
From a lease line
330 ft
minimum

A drilling unit in this field needs at least 5 acres. The field rule took effect on 2015-01-27.

The Commission's schedule remark for this field reads: THIS ORDER TO BE CANCELLED

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
OilDisposition111,373 bbl$5,083,540
Casinghead gasProduction529 Mcf$0
Total$5,083,540

529 Mcf of this lease's gas, across 24 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.

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 20261760106.413.05$18,728
Apr 2026167098.932.87$16,521
Mar 2026148089.753.15$13,283
Feb 2026150063.503.75$9,525
Jan 2026142059.138.00$8,396
Dec 2025173056.664.41$9,802
Nov 2025150058.593.93$8,789
Oct 2025161059.383.30$9,560
Sep 2025151062.743.08$9,474
Aug 2025169063.933.01$10,804
Jul 2025161066.743.32$10,745
Jun 2025153066.483.13$10,171
May 2025136060.553.23$8,235
Apr 2025144062.363.54$8,980
Mar 2025128067.704.27$8,666
Feb 2025159070.884.34$11,270
Jan 2025160074.324.28$11,891
Dec 2024156068.993.12$10,762
Nov 2024150069.052.20$10,358
Oct 2024169071.372.28$12,062
Sep 202462069.612.36$4,316
Aug 2024150075.632.06$11,345
Jul 2024147079.932.15$11,750
Jun 2024157078.082.63$12,259
May 2024162078.812.20$12,767
Apr 2024158084.451.66$13,343
Mar 2024150080.301.55$12,045
Feb 2024168076.091.78$12,783
Jan 2024168073.023.30$12,267
Dec 2023160071.262.61$11,402
Nov 2023174077.892.81$13,553
Oct 2023162085.443.09$13,841
Sep 2023168089.042.74$14,959
Aug 2023122080.522.67$9,823
Jul 2023165074.852.64$12,350
Jun 2023129068.962.26$8,896
May 2023154070.622.23$10,875
Apr 2023151078.122.24$11,796
Mar 2023152072.852.39$11,073
Feb 2023159075.112.47$11,942
Jan 2023150076.533.39$11,480
Dec 2022149076.415.73$11,385
Nov 2022171085.005.65$14,535
Oct 2022147087.185.86$12,815
Sep 2022164084.888.16$13,920
Aug 2022143094.529.13$13,516
Jul 20221810101.587.54$18,386
Jun 20221520115.097.98$17,494
May 20221490109.378.43$16,296
Apr 20221530104.226.84$15,946
Mar 20221650108.885.08$17,965
Feb 2022162091.054.86$14,750
Jan 2022166081.844.54$13,585
Dec 2021163071.323.90$11,625
Nov 2021165077.435.24$12,776
Oct 2021161079.795.71$12,846
Sep 2021159069.865.35$11,108
Aug 2021151066.024.22$9,969
Jul 2021171070.783.98$12,103
Jun 2021171069.493.38$11,883
May 2021171063.483.02$10,855
Apr 2021319060.362.76$19,255
Mar 2021155061.302.72$9,502
Feb 20210057.805.55$0
Jan 2021144050.412.81$7,259
Dec 2020178044.642.68$7,946
Nov 2020153038.772.71$5,932
Oct 2020214036.972.48$7,912
Sep 2020172037.091.99$6,379
Aug 2020147039.982.39$5,877
Jul 2020292038.371.83$11,204
Jun 20200034.901.69$0
May 2020195016.921.81$3,299
Apr 2020216014.751.80$3,186
Mar 2020167030.341.86$5,067
Feb 2020242049.881.98$12,071
Jan 2020242057.252.09$13,855
Dec 2019165059.012.30$9,737
Nov 2019161055.302.75$8,903
Oct 2019325053.472.42$17,378
Sep 2019150055.052.66$8,258
Aug 2019144053.112.30$7,648
Jul 2019154056.272.46$8,666
Jun 2019152052.782.49$8,023
May 2019121058.482.74$7,076
Apr 20190062.632.75$0
Mar 2019153056.803.06$8,690
Feb 2019144050.852.79$7,322
Jan 201996046.033.23$4,419
Dec 20180046.594.19$0
Nov 2018119052.934.24$6,299
Oct 2018133061.443.40$8,172
Sep 2018130059.543.11$7,740
Aug 201899059.403.07$5,881
Jul 20180065.142.93$0
Jun 2018113060.183.08$6,800
May 2018118065.382.90$7,715
Apr 2018150063.842.90$9,576
Mar 2018136061.222.79$8,326
Feb 2018303061.782.77$18,719
Jan 2018276062.874.01$17,352
Dec 2017163057.272.92$9,335
Nov 2017287055.423.12$15,906
Oct 2017256049.292.98$12,618
Sep 2017260047.523.09$12,355
Aug 2017152045.373.00$6,896
Jul 2017274043.873.09$12,020
Jun 2017277042.493.09$11,770
May 2017423045.373.26$19,192
Apr 2017322047.933.21$15,433
Mar 2017464046.772.98$21,701
Feb 2017141050.452.95$7,113
Jan 2017167049.413.42$8,251
Dec 20160048.763.72$0
Nov 20160042.492.64$0
Oct 20160046.193.09$0
Sep 20160041.553.10$0
Aug 20160041.442.92$0
Jul 20160041.622.92$0
Jun 20160045.352.69$0
May 20160042.521.99$0
Apr 20160036.561.99$0
Mar 20160033.011.79$0
Feb 20160026.472.06$0
Jan 2016276027.352.36$7,549
Dec 2015326032.362.00$10,549
Nov 2015257038.792.17$9,969
Oct 2015303043.552.43$13,196
Sep 2015133042.992.76$5,718
Aug 2015266040.162.87$10,683
Jul 2015301048.152.95$14,493
Jun 2015243056.152.88$13,644
May 2015260055.212.96$14,355
Apr 2015272049.822.71$13,551
Mar 2015316042.892.93$13,553
Feb 2015278044.662.98$12,415
Jan 2015304043.433.10$13,203
Dec 2014241054.693.59$13,180
Nov 2014123070.464.25$8,667
Oct 2014241078.303.90$18,870
Sep 2014172086.164.05$14,820
Aug 2014305089.394.04$27,264
Jul 2014303096.564.18$29,258
Jun 2014327098.164.74$32,098
May 2014249094.734.73$23,588
Apr 2014248095.944.81$23,793
Mar 2014110095.895.06$10,548
Feb 2014271097.406.19$26,395
Jan 2014292090.404.86$26,397
Dec 2013282091.824.35$25,893
Nov 2013298088.853.74$26,477
Oct 2013268097.423.78$26,109
Sep 20132780104.113.72$28,943
Aug 20132810104.253.52$29,294
Jul 20133310102.523.72$33,934
Jun 2013252094.403.93$23,789
May 2013128094.834.15$12,138
Apr 2013173093.964.28$16,255
Mar 2013287093.623.91$26,869
Feb 2013280091.233.42$25,544
Jan 2013310091.603.42$28,396
Dec 2012287086.773.42$24,903
Nov 2012274086.953.62$23,824
Oct 2012155089.383.40$13,854
Sep 2012290094.672.92$27,454
Aug 2012314092.662.91$29,095
Jul 2012271085.133.02$23,070
Jun 2012175079.822.52$13,969
May 2012319091.612.49$29,224
Apr 20122990101.652.00$30,393
Mar 20121350105.052.22$14,182
Feb 20123040101.102.57$30,734
Jan 2012268098.092.73$26,288
Dec 2011168096.873.24$16,274
Nov 2011252095.723.31$24,121
Oct 2011284084.983.65$24,134
Sep 2011226083.623.99$18,898
Aug 2011256083.404.15$21,350
Jul 2011253094.144.52$23,817
Jun 2011268092.904.64$24,897
May 2011281098.134.40$27,575
Apr 20112650105.964.33$28,079
Mar 2011295096.364.06$28,426
Feb 2011248085.644.18$21,239
Jan 2011254086.504.59$21,971
Dec 2010240085.734.35$20,575
Nov 2010273080.843.80$22,069
Oct 2010293078.103.51$22,883
Sep 2010319072.633.98$23,169
Aug 2010295073.684.42$21,736
Jul 2010270072.554.74$19,589
Jun 2010263070.364.91$18,505
May 2010317071.124.24$22,545
Apr 2010300081.694.12$24,507
Mar 2010266078.394.39$20,852
Feb 2010159073.585.44$11,699
Jan 2010300074.365.96$22,308
Dec 2009311071.445.48$22,218
Nov 2009140074.593.75$10,443
Oct 2009156072.544.11$11,316
Sep 2009149065.543.06$9,765
Aug 2009172067.423.22$11,596
Jul 2009159061.133.46$9,720
Jun 2009335066.163.90$22,164
May 20090054.743.93$0
Apr 2009379046.773.59$17,726
Mar 2009165042.144.06$6,953
Feb 2009213032.814.63$6,989
Jan 2009380035.865.37$13,627
Dec 2008175037.105.98$6,493
Nov 2008345055.496.86$19,144
Oct 2008190075.246.92$14,296
Sep 20083810101.767.88$38,771
Aug 20083840114.228.48$43,860
Jul 20081890131.0811.39$24,774
Jun 20081960131.3313.03$25,741
May 20083510123.1711.57$43,233
Apr 20083480110.3110.45$38,388
Mar 20082020101.909.66$20,584
Feb 2008408092.538.77$37,752
Jan 2008183090.388.21$16,540
Dec 2007187088.337.30$16,518
Nov 2007358091.677.29$32,818
Oct 2007182082.856.92$15,079
Sep 2007361075.846.24$27,378
Aug 2007383069.066.39$26,450
Jul 2007359070.906.39$25,453
Jun 2007354062.007.55$21,948
May 2007366058.747.85$21,499
Apr 2007179059.617.81$10,670
Mar 2007179056.927.30$10,189
Feb 2007361055.108.22$19,891
Jan 2007359050.306.73$18,058
Dec 2006188056.656.92$10,650
Nov 2006352054.207.62$19,078
Oct 2006379054.906.01$20,807
Sep 2006184060.085.04$11,055
Aug 2006387068.717.34$26,591
Jul 2006392069.376.34$27,193
Jun 2006394066.286.38$26,114
May 2006375066.016.42$24,754
Apr 2006372064.397.36$23,953
Mar 2006187056.707.08$10,603
Feb 2006372057.597.75$21,423
Jan 2006373060.598.93$22,600
Dec 2005485054.9413.42$26,646
Nov 2005368054.6910.59$20,126
Oct 2005396058.3413.80$23,103
Sep 2005206061.4512.08$12,659
Aug 2005213061.519.80$13,102
Jul 2005409055.697.84$22,777
Jun 2005367052.337.38$19,205
May 2005364045.226.65$16,460
Apr 2005379049.207.36$18,647
Mar 2005575050.377.15$28,963
Feb 2005180045.226.31$8,140
Jan 2005368043.166.32$15,883
Dec 2004546039.866.75$21,764
Nov 2004347045.286.33$15,712
Oct 2004371049.706.52$18,439
Sep 2004376043.245.28$16,258
Aug 2004559042.375.55$23,685
Jul 2004365038.286.08$13,972
Jun 2004556036.106.43$20,072
May 2004520037.486.49$19,490
Apr 2004554034.475.86$19,096
Mar 2004367034.365.53$12,610
Feb 2004372032.455.51$12,071
Jan 2004559032.036.30$17,905
Dec 2003718030.266.30$21,727
Nov 2003348028.804.60$10,022
Oct 2003704028.174.76$19,832
Sep 2003371026.314.75$9,761
Aug 2003527029.765.13$15,684
Jul 2003363029.415.17$10,676
Jun 2003361028.565.98$10,310
May 2003731026.595.97$19,437
Apr 2003639026.675.41$17,042
Mar 2003687031.146.10$21,393
Feb 2003551033.487.93$18,447
Jan 2003700030.315.58$21,217
Dec 2002905026.914.85$24,354
Nov 2002335024.664.14$8,261
Oct 2002513026.464.23$13,574
Sep 2002328027.443.64$9,000
Aug 2002709025.963.16$18,406
Jul 2002507024.583.06$12,462
Jun 2002190023.733.34$4,509
May 2002345024.663.58$8,508
Apr 2002365023.653.51$8,632
Mar 2002373022.003.10$8,206
Feb 2002352018.222.38$6,413
Jan 2002448017.172.38$7,692
Dec 2001508016.932.36$8,600
Nov 2001372018.072.41$6,722
Oct 20010019.782.53$0
Sep 20010024.262.25$0
Aug 20010024.873.05$0
Jul 2001105023.933.20$2,513
Jun 20010024.563.82$0
May 20010025.524.31$0
Apr 20010024.685.34$0
Mar 20010024.545.38$0
Feb 20010027.755.77$0
Jan 20010027.478.40$0
Dec 20000026.889.12$0
Nov 20000032.215.66$0
Oct 20000031.235.15$0
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 20000028.422.86$0
Feb 2000143027.622.73$3,950
Jan 2000198025.272.48$5,003
Dec 1999423024.282.42$10,270
Nov 1999150023.192.43$3,479
Oct 1999206020.982.80$4,322
Sep 1999183021.752.62$3,980
Aug 1999172019.262.88$3,313
Jul 1999355017.892.37$6,351
Jun 1999379015.942.36$6,041
May 1999410015.792.32$6,474
Apr 19990015.102.21$0
Mar 1999490012.471.84$6,110
Feb 199920709.981.82$2,066
Jan 1999415010.381.90$4,308
Dec 199841609.201.77$3,827
Nov 1998385010.892.19$4,193
Oct 1998194012.421.97$2,409
Sep 1998403012.592.08$5,074
Aug 1998415011.301.91$4,690
Jul 1998386011.742.24$4,532
Jun 1998411011.242.24$4,620
May 1998391012.622.21$4,934
Apr 1998190013.042.51$2,478
Mar 1998394012.802.31$5,043
Feb 1998397013.952.30$5,538
Jan 1998418014.702.15$6,145
Dec 1997627016.322.41$10,233
Nov 1997209018.193.09$3,802
Oct 1997587019.253.15$11,300
Sep 1997410017.742.95$7,273
Aug 1997412017.862.55$7,358
Jul 1997204017.582.25$3,586
Jun 1997424017.242.26$7,310
May 1997386018.972.31$7,322
Apr 1997373017.882.08$6,669
Mar 1997367018.951.94$6,955
Feb 1997502020.492.21$10,286
Jan 1997387023.483.54$9,087
Dec 1996420023.32$9,794
Nov 1996363021.97$7,975
Oct 1996632023.31$14,732
Sep 1996181022.22$4,022
Aug 1996182020.26$3,687
Jul 1996190019.55$3,715
Jun 1996381018.73$7,136
May 1996184019.43$3,575
Apr 1996193021.51$4,151
Mar 1996372019.38$7,209
Feb 1996186016.98$3,158
Jan 1996380017.07$6,487
Dec 1995374017.19$6,429
Nov 1995375016.00$6,000
Oct 1995367015.43$5,663
Sep 1995551016.18$8,915
Aug 1995563015.92$8,963
Jul 1995744015.24$11,339
Jun 1995377016.41$6,187
May 1995765017.56$13,433
Apr 1995563017.73$9,982
Mar 1995562416.44$9,239
Feb 1995378016.58$6,267
Jan 1995483015.92$7,689
Dec 1994551015.03$8,282
Nov 1994576415.90$9,158
Oct 19946378615.58$9,924
Sep 199455418715.29$8,471
Aug 199456222916.13$9,065
Jul 1994736117.56$12,924
Jun 1994368117.09$6,289
May 1994520115.88$8,258
Apr 1994701114.14$9,912
Mar 1994577112.46$7,189
Feb 1994558112.50$6,975
Jan 1994560112.66$7,090
Dec 1993717112.33$8,841
Nov 1993544114.49$7,883
Oct 1993539115.85$8,543
Sep 1993687115.03$10,326
Aug 1993543115.66$8,503
Jul 1993595115.46$9,199
Jun 1993713116.79$11,971
May 1993732117.68$12,942
Apr 1993550118.05$9,928
Mar 1993544118.14$9,868
Feb 1993547117.90$9,791
Jan 1993756116.93$12,799

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                  176 bbl  × $106.41 =    $18,728
Casinghead gas         0 Mcf  × $  3.05 =         $0

────────────────────────────────────────────────────
Month total                                  $18,728

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. 6E/O/6438 is the state's own key, not one this site invented.