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SCHROCK, W. M.-24

Operated by APACHE CORPORATION (P-5 27200) in the SPRABERRY (TREND AREA) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 6311District 08Field 85280300NGPA filingOilCasinghead gasSaveExport
Value, all time
$53.9 M
Jan 1993 – May 2026
Value, last 12 filed months
$0
at the published price for each month
Months reported
401
no gaps in the span
Streams
2
oil, casinghead gas

The SPRABERRY (TREND AREA) field

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 16,587 leases and 43,997 wells, and the rule below applies to all of them.

Discovered
1952-12-22
as the register files it
Field class
Oil and gas
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 80 acres. The field rule took effect on 2018-02-13.

The Commission's schedule remark for this field reads: “SPRABERRY (TREND AREA) FIELD EFFECTIVE 10/1/2019.”

Severance-tax incentive filings

Applications the operator filed to have this lease's gas taxed at a reduced state rate. A filing is an application, and this page never calls one a reduction that was granted.

ProgrammeFilingsWith an approval dateDatedDocket
NGPA1none——

This says nothing about a royalty. A severance tax is charged to the operator. Whether a reduced rate reaches a royalty owner depends on the wording of the lease instrument, which is a private contract this site does not hold.

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
OilDisposition1,012,558 bbl$49,292,101
Casinghead gasProduction1,389,081 Mcf$4,578,939
Total$53,871,040

304,789 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 (17)

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 31.7624, -101.7670. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.9 miles. 1 well has no surveyed location and is left out of it.

31.76228, -101.76717 · centre of 16 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
82.4%
14 of 17 wells
With a plug date
76.5%
13 of 17 wells
Median depth
9,220 ft
16 wells filed one
Completion to plug
15.9 years
median over 13 wells

What the state filed about each well

On the RRC proration schedule
1482.4%
A plug date is filed
1376.5%
BothOn the schedule and plugged. Neither fact cancels the other.
1376.5%
NeitherNo plug date, and not on the schedule.
317.6%

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

Total depth in feet, 16 of 17 wells. Median 9,220 ft, with the middle half between 8,700 and 9,877 ft; the shallowest is 7,804 ft and the deepest 9,950 ft. The median is published rather than the mean, because a single mis-keyed depth moves a mean and cannot move a median.

When they were last completed

Last completion by decade, 16 of 17 wells, Dec 1976 – Aug 2023. This is the LAST completion filed on each wellbore, not the first — a well recompleted in 2019 counts once, in the 2010s.

Completions filed
Dec 1976 – Aug 2023
16 of 17 wells; 1 filed none
Plug dates filed
Aug 2012 – Oct 2022
13 of 17 wells; 4 filed none

Last completion to plug: a median of 15.9 years across the 13 wells that filed both dates, with the middle half between 13.9 years and 26.3 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

17 wells

42-173802363———Yes
42-173001353A8,700 ftAug 2023——
42-1730013217,804 ftJul 2019May 2022Yes
42-1733230988,725 ftMar 2019——
42-1733231068,725 ftFeb 2019——
42-17333320169,876 ftMay 2008Apr 2022Yes
42-17333296159,868 ftMar 2008Oct 2022Yes
42-17333319149,880 ftJan 2008Jul 2021Yes
42-17333295139,910 ftAug 2007Aug 2017Yes
42-17333197129,950 ftOct 2006Oct 2022Yes
42-17333196119,875 ftOct 2006Sep 2022Yes
42-17333198109,907 ftSep 2006May 2022Yes
42-1733259399,144 ftMar 1996Jun 2022Yes
42-1733213759,296 ftMar 1996May 2022Yes
42-1733231478,695 ftMay 1993Jun 2022Yes
42-1733139648,700 ftMay 1983Sep 2021Yes
42-1730013328,625 ftDec 1976Aug 2012Yes

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 20260089.753.15$0
Feb 20260063.503.75$0
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 20250067.704.27$0
Feb 20250070.884.34$0
Jan 20250074.324.28$0
Dec 20240068.993.12$0
Nov 20240069.052.20$0
Oct 20240071.372.28$0
Sep 20240069.612.36$0
Aug 20240075.632.06$0
Jul 20240079.932.15$0
Jun 20240078.082.63$0
May 20240078.812.20$0
Apr 20240084.451.66$0
Mar 20240080.301.55$0
Feb 20240076.091.78$0
Jan 20240073.023.30$0
Dec 20230071.262.61$0
Nov 20230077.892.81$0
Oct 20230085.443.09$0
Sep 20230089.042.74$0
Aug 20230080.522.67$0
Jul 20230074.852.64$0
Jun 20230068.962.26$0
May 20230070.622.23$0
Apr 20230078.122.24$0
Mar 20230072.852.39$0
Feb 20230075.112.47$0
Jan 20230076.533.39$0
Dec 20220076.415.73$0
Nov 20220085.005.65$0
Oct 20220087.185.86$0
Sep 20220084.888.16$0
Aug 20220094.529.13$0
Jul 202200101.587.54$0
Jun 202200115.097.98$0
May 202200109.378.43$0
Apr 202200104.226.84$0
Mar 202200108.885.08$0
Feb 20220091.054.86$0
Jan 20220081.844.54$0
Dec 20210071.323.90$0
Nov 20210077.435.24$0
Oct 20210079.795.71$0
Sep 20210069.865.35$0
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 20210061.302.72$0
Feb 20210057.805.55$0
Jan 20210050.412.81$0
Dec 20200044.642.68$0
Nov 20200038.772.71$0
Oct 20200036.972.48$0
Sep 20200037.091.99$0
Aug 20200039.982.39$0
Jul 20200038.371.83$0
Jun 20200034.901.69$0
May 20200016.921.81$0
Apr 20200014.751.80$0
Mar 2020100030.341.86$3,034
Feb 20201049.881.98$50
Jan 20201057.252.09$57
Dec 201911059.012.30$649
Nov 20190055.302.75$0
Oct 201949053.472.42$2,620
Sep 20190055.052.66$0
Aug 20190053.112.30$0
Jul 20190056.272.46$0
Jun 201957052.782.49$3,008
May 2019101458.482.74$5,917
Apr 201983262.632.75$5,204
Mar 2019891456.803.06$5,098
Feb 2019194150.852.79$9,868
Jan 2019421046.033.23$19,379
Dec 20185964646.594.19$27,960
Nov 20187098152.934.24$37,871
Oct 20184635061.443.40$28,617
Sep 20181,00331859.543.11$60,707
Aug 20181,12429959.403.07$67,683
Jul 20181,18520865.142.93$77,801
Jun 2018259060.183.08$15,587
May 2018804065.382.90$52,566
Apr 20181,7444563.842.90$111,468
Mar 201812461.222.79$746
Feb 20181061.782.77$62
Jan 20180062.874.01$0
Dec 201732057.272.92$1,833
Nov 2017264055.423.12$14,631
Oct 201798048549.292.98$49,751
Sep 20172,17496747.523.09$106,294
Aug 20172,0191,06145.373.00$94,790
Jul 20172,0571,13843.873.09$93,754
Jun 20171,5781,03542.493.09$70,245
May 20171,5081,08245.373.26$71,949
Apr 20171,6011,56347.933.21$81,756
Mar 20171,8401,24946.772.98$89,783
Feb 20171,8511,38650.452.95$97,475
Jan 20172,0641,19949.413.42$106,081
Dec 20162,4561,67848.763.72$126,001
Nov 20162,5341,73042.492.64$112,244
Oct 20162,2501,76246.193.09$109,373
Sep 20161,5561,53541.553.10$69,411
Aug 20162,2052,03241.442.92$97,317
Jul 20162,4232,28041.622.92$107,513
Jun 20162,2462,25645.352.69$107,915
May 20162,0892,38342.521.99$93,569
Apr 20162,5092,53936.561.99$96,784
Mar 20162,4922,51433.011.79$86,771
Feb 20162,3962,33526.472.06$68,241
Jan 20162,6512,30027.352.36$77,943
Dec 20152,0991,49732.362.00$70,920
Nov 20152,5132,19938.792.17$102,245
Oct 20153,6012,97543.552.43$164,043
Sep 20153,3533,10642.992.76$152,713
Aug 20153,4872,92040.162.87$148,426
Jul 20153,2132,77748.152.95$162,884
Jun 20152,9742,78956.152.88$175,030
May 20152,9212,77155.212.96$169,458
Apr 20152,7162,66849.822.71$142,532
Mar 20152,8072,56742.892.93$127,926
Feb 20152,5992,32244.662.98$122,982
Jan 20152,5502,19743.433.10$117,559
Dec 20143,2942,62654.693.59$189,580
Nov 20143,4762,53070.464.25$255,676
Oct 20143,1272,60078.303.90$254,987
Sep 20143,6692,43486.164.05$325,968
Aug 20142,6861,45589.394.04$245,973
Jul 20143,261096.564.18$314,882
Jun 20143,2252,93198.164.74$330,450
May 20143,2643,02294.734.73$323,482
Apr 20143,5022,81095.944.81$349,496
Mar 20143,1952,53595.895.06$319,188
Feb 20143,1402,56497.406.19$321,712
Jan 20143,5072,70990.404.86$330,200
Dec 20132,8102,07991.824.35$267,067
Nov 20133,0332,30688.853.74$278,103
Oct 20133,2912,55897.423.78$330,277
Sep 20133,2723,005104.113.72$351,820
Aug 20133,6533,350104.253.52$392,626
Jul 20134,0083,099102.523.72$422,421
Jun 20133,6942,99694.403.93$360,498
May 20132,6032,65394.834.15$257,850
Apr 20132,5882,90093.964.28$255,588
Mar 20132,1252,44893.623.91$208,521
Feb 20132,4552,73791.233.42$233,330
Jan 20131,9202,37191.603.42$183,981
Dec 20122,2912,78086.773.42$208,298
Nov 20122,6703,51686.953.62$244,902
Oct 20123,1934,04689.383.40$299,145
Sep 20123,0564,30394.672.92$301,869
Aug 20123,7434,68692.662.91$360,454
Jul 20124,0724,99485.133.02$361,735
Jun 20124,4694,89479.822.52$369,044
May 20125,3855,27191.612.49$506,436
Apr 20124,6964,732101.652.00$486,797
Mar 20125,9875,504105.052.22$641,165
Feb 20125,6754,842101.102.57$586,188
Jan 20126,9515,13598.092.73$695,863
Dec 20116,8864,96496.873.24$683,129
Nov 20116,4974,73995.723.31$637,585
Oct 20116,3194,86684.983.65$554,742
Sep 20116,6845,13383.623.99$579,375
Aug 20117,0964,93283.404.15$612,271
Jul 20116,4544,66094.144.52$628,630
Jun 20116,7464,69692.904.64$648,492
May 20116,0014,76198.134.40$609,849
Apr 20114,6823,155105.964.33$509,776
Mar 20116,8204,13896.364.06$673,964
Feb 20113,2731,99785.644.18$288,647
Jan 20116,5224,68186.504.59$585,633
Dec 20106,0015,04085.734.35$536,378
Nov 20105,9634,74280.843.80$500,046
Oct 20105,6034,99478.103.51$455,118
Sep 20105,9375,22372.633.98$451,989
Aug 20104,1555,84773.684.42$331,980
Jul 20104,3374,42472.554.74$335,604
Jun 20105,7505,32670.364.91$430,723
May 20107,5536,62271.124.24$565,215
Apr 20103,3352,82481.694.12$284,079
Mar 20104,6064,49378.394.39$380,783
Feb 20104,0764,20673.585.44$322,803
Jan 20105,2285,05474.365.96$418,897
Dec 20095,4675,17171.445.48$418,919
Nov 20094,2545,09274.593.75$336,409
Oct 20095,4295,65972.544.11$417,080
Sep 20095,0985,89765.543.06$352,196
Aug 20094,2635,39767.423.22$304,782
Jul 20095,0945,46561.133.46$330,330
Jun 20095,4596,10466.163.90$384,943
May 20094,8475,89954.743.93$288,483
Apr 20094,1364,55146.773.59$209,767
Mar 20094,5455,77242.144.06$214,955
Feb 20093,8555,40232.814.63$151,510
Jan 20094,2765,71935.865.37$184,054
Dec 20081,6852,79937.105.98$79,244
Nov 20082,0192,55655.496.86$129,569
Oct 20085,1146,90375.246.92$432,560
Sep 20082,4453,382101.767.88$275,444
Aug 20084,6156,468114.228.48$581,993
Jul 20082,0462,648131.0811.39$298,349
Jun 20081,0741,776131.3313.03$164,194
May 20081,9202,580123.1711.57$266,348
Apr 20082,0942,658110.3110.45$258,778
Mar 20082,7923,436101.909.66$317,711
Feb 20082,5192,69492.538.77$256,711
Jan 20082,6122,69290.388.21$258,162
Dec 20072,8431,92488.337.30$265,171
Nov 20071,7781,75291.677.29$175,764
Oct 20072,1333,00782.856.92$197,533
Sep 20072,3193,18775.846.24$195,773
Aug 20072,4312,43269.066.39$183,420
Jul 20072,4362,03070.906.39$185,680
Jun 20072,1431,99162.007.55$147,895
May 20071,7962,09158.747.85$121,904
Apr 20071,8081,60459.617.81$120,294
Mar 20071,3651,16956.927.30$86,232
Feb 20071,6911,54755.108.22$105,884
Jan 20072,3501,63450.306.73$129,197
Dec 20061,8361,73456.656.92$116,006
Nov 20062,1301,36454.207.62$125,836
Oct 20062,1371,40354.906.01$125,759
Sep 20062,1921,64460.085.04$139,977
Aug 20062,5691,73668.717.34$189,258
Jul 20063,3102,36369.376.34$244,603
Jun 20062,2002,40466.286.38$161,163
May 20062,8522,61766.016.42$205,075
Apr 20063,4903,34464.397.36$249,335
Mar 20062,2753,25956.707.08$152,076
Feb 20062,0912,93657.597.75$143,178
Jan 20062,1873,22960.598.93$161,356
Dec 20051,9893,46554.9413.42$155,760
Nov 20053,6473,60054.6910.59$237,573
Oct 20053,5613,55158.3413.80$256,737
Sep 20052,6823,26061.4512.08$204,186
Aug 20053,1794,43661.519.80$238,999
Jul 20052,9634,57955.697.84$200,926
Jun 20052,5594,45152.337.38$166,765
May 20053,1153,96845.226.65$167,252
Apr 20053,0604,05249.207.36$180,377
Mar 20053,6284,33550.377.15$213,759
Feb 20052,8722,99945.226.31$148,801
Jan 20052,8074,10243.166.32$147,084
Dec 20042,5152,68739.866.75$118,388
Nov 20042,8562,57245.286.33$145,602
Oct 20042,9423,26449.706.52$167,483
Sep 20043,0023,43043.245.28$147,930
Aug 20041,7713,93142.375.55$96,857
Jul 20042,6033,90638.286.08$123,408
Jun 20042,4113,76136.106.43$111,232
May 20042,1163,92037.486.49$104,766
Apr 20042,6653,97434.475.86$115,144
Mar 20043,1354,35734.365.53$131,813
Feb 20042,4783,69032.455.51$100,742
Jan 20043,1263,88632.036.30$124,606
Dec 20033,0364,29330.266.30$118,922
Nov 20032,4854,14628.804.60$90,620
Oct 20032,3794,06528.174.76$86,364
Sep 20032,3394,29426.314.75$81,933
Aug 20032,3464,49229.765.13$92,860
Jul 20032,7224,72129.415.17$104,466
Jun 20032,5354,80928.565.98$101,172
May 20033,1885,55426.595.97$117,941
Apr 20034,1455,84726.675.41$142,164
Mar 20033,7075,86431.146.10$151,183
Feb 20032,9115,39233.487.93$140,197
Jan 20033,2715,39130.315.58$129,237
Dec 20023,4805,22726.914.85$119,017
Nov 20023,3825,37524.664.14$105,636
Oct 20023,1075,41826.464.23$105,125
Sep 20023,3556,44727.443.64$115,497
Aug 20023,3806,93625.963.16$109,691
Jul 20023,7727,01424.583.06$114,191
Jun 20023,6416,43723.733.34$107,889
May 20023,7106,56224.663.58$115,007
Apr 20023,9126,48123.653.51$115,282
Mar 20024,5276,53922.003.10$119,883
Feb 20023,4534,92218.222.38$74,607
Jan 20024,353017.172.38$74,741
Dec 20014,1595,69916.932.36$83,887
Nov 20013,9475,40318.072.41$84,319
Oct 20014,1026,42619.782.53$97,388
Sep 20013,8246,45124.262.25$107,294
Aug 20012,9985,84524.873.05$92,406
Jul 20012,8665,81923.933.20$87,187
Jun 20013,2496,25224.563.82$103,704
May 20013,4666,68125.524.31$117,230
Apr 20013,2955,88424.685.34$112,714
Mar 20013,0736,26424.545.38$109,089
Feb 20012,8185,67127.755.77$110,905
Jan 20013,0996,20827.478.40$137,269
Dec 20003,2106,21626.889.12$142,990
Nov 20003,0056,32532.215.66$132,578
Oct 20003,1376,91831.235.15$133,565
Sep 20002,8286,79131.875.19$125,350
Aug 20003,2607,15829.644.54$129,129
Jul 20003,2077,30628.534.09$121,375
Jun 20003,0537,03529.304.40$120,388
May 20003,3847,44727.263.68$119,651
Apr 20003,0147,25224.513.12$96,470
Mar 20003,3596,63728.422.86$114,443
Feb 20003,4476,55427.622.73$113,076
Jan 20002,7516,48425.272.48$85,601
Dec 19992,9215,86924.282.42$85,147
Nov 19992,8567,08423.192.43$83,473
Oct 19992,8586,67420.982.80$78,673
Sep 19992,3136,27821.752.62$66,749
Aug 19992,9207,13719.262.88$76,762
Jul 19992,7206,96517.892.37$65,184
Jun 19992,6476,95615.942.36$58,624
May 19992,9427,65515.792.32$64,222
Apr 19992,7717,56215.102.21$58,539
Mar 19992,8586,86112.471.84$48,252
Feb 19992,6006,3339.981.82$37,460
Jan 19993,0986,78110.381.90$45,041
Dec 19983,4226,7579.201.77$43,465
Nov 19982,4776,29110.892.19$40,725
Oct 19982,1866,64412.421.97$40,234
Sep 19982,6966,82812.592.08$48,163
Aug 19982,7746,98711.301.91$44,673
Jul 19982,9057,26711.742.24$50,363
Jun 19982,7827,31211.242.24$47,629
May 19982,9957,25812.622.21$53,811
Apr 19983,3207,23013.042.51$61,406
Mar 19982,9567,89912.802.31$56,079
Feb 19982,8587,02713.952.30$56,025
Jan 19983,3987,96814.702.15$67,120
Dec 19973,3737,31816.322.41$72,692
Nov 19973,5107,08418.193.09$85,724
Oct 19972,9977,74219.253.15$82,078
Sep 19973,3027,68917.742.95$81,298
Aug 19973,3628,36417.862.55$81,413
Jul 19973,4347,61117.582.25$77,471
Jun 19973,5656,33817.242.26$75,767
May 19973,2747,16418.972.31$78,646
Apr 19973,4958,11617.882.08$79,394
Mar 19973,8638,37518.951.94$89,444
Feb 19973,6796,80420.492.21$90,392
Jan 19973,9198,50823.483.54$122,134
Dec 19963,8718,35823.32—$90,272
Nov 19964,2967,66021.97—$94,383
Oct 19964,4857,56423.31—$104,545
Sep 19964,7627,46422.22—$105,812
Aug 19964,1497,77420.26—$84,059
Jul 19964,5938,00419.55—$89,793
Jun 19964,6407,64518.73—$86,907
May 19964,8887,70719.43—$94,974
Apr 19964,7457,09421.51—$102,065
Mar 19964,2535,95919.38—$82,423
Feb 19963,3256,31616.98—$56,459
Jan 19963,9586,41017.07—$67,563
Dec 19953,5926,16817.19—$61,746
Nov 19953,6086,19216.00—$57,728
Oct 19954,2356,70615.43—$65,346
Sep 19954,0926,15716.18—$66,209
Aug 19954,4116,13215.92—$70,223
Jul 19954,2065,45115.24—$64,099
Jun 19953,5855,59716.41—$58,830
May 19953,21211,74817.56—$56,403
Apr 19953,0265,33617.73—$53,651
Mar 19953,3295,40416.44—$54,729
Feb 19952,5545,12216.58—$42,345
Jan 19953,22438515.92—$51,326
Dec 19943,6806,24315.03—$55,310
Nov 19943,9646,40615.90—$63,028
Oct 19943,4746,21515.58—$54,125
Sep 19943,7776,71715.29—$57,750
Aug 19943,6117,01416.13—$58,245
Jul 19943,4956,77517.56—$61,372
Jun 19943,6947,04617.09—$63,130
May 19944,4688,47915.88—$70,952
Apr 19943,5888,09414.14—$50,734
Mar 19943,6927,32612.46—$46,002
Feb 19943,5315,96112.50—$44,138
Jan 19943,9436,47212.66—$49,918
Dec 19934,2526,52712.33—$52,427
Nov 19933,5886,39414.49—$51,990
Oct 19934,1246,74015.85—$65,365
Sep 19934,0047,41415.03—$60,180
Aug 19934,6837,77215.66—$73,336
Jul 19935,3258,70115.46—$82,325
Jun 19936,0427,92116.79—$101,445
May 19932,9924,50817.68—$52,899
Apr 19932,3913,58518.05—$43,158
Mar 19933,1463,85518.14—$57,068
Feb 199364213717.90—$11,492
Jan 199385313416.93—$14,441

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 2020 — as filed, then multipliedworked
Oil                  100 bbl  × $ 30.34 =     $3,034
Casinghead gas         0 Mcf  × $  1.86 =         $0

────────────────────────────────────────────────────
Month total                                   $3,034

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. 08/O/6311 is the state's own key, not one this site invented.