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TUBB, J.B. "AK" A/C 1

Operated by FORMENTERA OPERATIONS LLC (P-5 276959) in the SAND HILLS (MCKNIGHT) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 23433District 08Field 80473310Hydrogen sulphide fieldOilCasinghead gasSaveExport
Value, all time
$1.3 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 SAND HILLS (MCKNIGHT) 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 215 leases and 1,609 wells, and the rule below applies to all of them.

Discovered
1944-12-31
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 10 acres. The field rule took effect on 2024-12-17.

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: “ONLY. 6MONTH EXCEPTION TO SWR51A. SPECIAL HZ LANGUAGE”

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
OilDisposition20,626 bbl$899,608
Casinghead gasProduction76,519 Mcf$373,189
Total$1,272,797

20,704 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.

These wells centre on 31.4673, -102.5888. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.3 miles.

31.46726, -102.58879 · 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
100.0%
2 of 2 wells
With a plug date
0.0%
0 of 2 wells
Median depth
4,568 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
2100.0%
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.
00.0%

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 4,556 and 4,580 ft, median 4,568 ft, over the 2 wells that filed a depth.

Completions filed
May 1978 – Apr 2013
2 of 2 wells

2 wells

42-1030456014,556 ftApr 2013—Yes
42-1030456124,580 ftMay 1978—Yes

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 20200030.341.86$0
Feb 20200049.881.98$0
Jan 20200057.252.09$0
Dec 20190059.012.30$0
Nov 20190055.302.75$0
Oct 20190053.472.42$0
Sep 20190055.052.66$0
Aug 20190053.112.30$0
Jul 20190056.272.46$0
Jun 20190052.782.49$0
May 20190058.482.74$0
Apr 20190062.632.75$0
Mar 20190056.803.06$0
Feb 20190050.852.79$0
Jan 20190046.033.23$0
Dec 20180046.594.19$0
Nov 20180052.934.24$0
Oct 20180061.443.40$0
Sep 20180059.543.11$0
Aug 20180059.403.07$0
Jul 20180065.142.93$0
Jun 20180060.183.08$0
May 20180065.382.90$0
Apr 20180063.842.90$0
Mar 20180061.222.79$0
Feb 20180061.782.77$0
Jan 20180062.874.01$0
Dec 20170057.272.92$0
Nov 20170055.423.12$0
Oct 20170049.292.98$0
Sep 20170047.523.09$0
Aug 20170045.373.00$0
Jul 20170043.873.09$0
Jun 20170042.493.09$0
May 20170045.373.26$0
Apr 20170047.933.21$0
Mar 20170046.772.98$0
Feb 20170050.452.95$0
Jan 20170049.413.42$0
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 20160027.352.36$0
Dec 20150032.362.00$0
Nov 20150038.792.17$0
Oct 20150043.552.43$0
Sep 20150042.992.76$0
Aug 20150040.162.87$0
Jul 20150048.152.95$0
Jun 20150056.152.88$0
May 20150055.212.96$0
Apr 20150049.822.71$0
Mar 20150042.892.93$0
Feb 20150044.662.98$0
Jan 20150043.433.10$0
Dec 20140054.693.59$0
Nov 20140070.464.25$0
Oct 20140078.303.90$0
Sep 20140086.164.05$0
Aug 20140089.394.04$0
Jul 20140096.564.18$0
Jun 20140098.164.74$0
May 20140094.734.73$0
Apr 20140095.944.81$0
Mar 20140095.895.06$0
Feb 20140097.406.19$0
Jan 20140090.404.86$0
Dec 20130091.824.35$0
Nov 20130088.853.74$0
Oct 20130097.423.78$0
Sep 201300104.113.72$0
Aug 201300104.253.52$0
Jul 201300102.523.72$0
Jun 20130094.403.93$0
May 20130094.834.15$0
Apr 20130093.964.28$0
Mar 20130093.623.91$0
Feb 20130091.233.42$0
Jan 20130091.603.42$0
Dec 20120086.773.42$0
Nov 20120086.953.62$0
Oct 20120089.383.40$0
Sep 20120094.672.92$0
Aug 20120092.662.91$0
Jul 20120085.133.02$0
Jun 20120079.822.52$0
May 20120091.612.49$0
Apr 201200101.652.00$0
Mar 201200105.052.22$0
Feb 201200101.102.57$0
Jan 20120098.092.73$0
Dec 20110096.873.24$0
Nov 20110095.723.31$0
Oct 20110084.983.65$0
Sep 20110083.623.99$0
Aug 20110083.404.15$0
Jul 20110094.144.52$0
Jun 20110092.904.64$0
May 20110098.134.40$0
Apr 201100105.964.33$0
Mar 20110096.364.06$0
Feb 20110085.644.18$0
Jan 20110086.504.59$0
Dec 201087085.734.35$7,459
Nov 201075080.843.80$6,063
Oct 201097078.103.51$7,576
Sep 201071072.633.98$5,157
Aug 201088073.684.42$6,484
Jul 201092072.554.74$6,675
Jun 201089070.364.91$6,262
May 201095071.124.24$6,756
Apr 201094081.694.12$7,679
Mar 201089078.394.39$6,977
Feb 201069073.585.44$5,077
Jan 201060074.365.96$4,462
Dec 200975071.445.48$5,358
Nov 2009111074.593.75$8,279
Oct 2009125072.544.11$9,068
Sep 200997065.543.06$6,357
Aug 200991067.423.22$6,135
Jul 20097010461.133.46$4,639
Jun 2009061066.163.90$2,376
May 20090054.743.93$0
Apr 200911046.773.59$514
Mar 200912867742.144.06$8,142
Feb 200912460532.814.63$6,871
Jan 200917284335.865.37$10,696
Dec 200817579137.105.98$11,220
Nov 200818485355.496.86$16,062
Oct 200825879875.246.92$24,936
Sep 2008262730101.767.88$32,411
Aug 20081630114.228.48$18,618
Jul 2008164617131.0811.39$28,524
Jun 2008136582131.3313.03$25,446
May 2008113620123.1711.57$21,094
Apr 2008122627110.3110.45$20,013
Mar 2008181673101.909.66$24,948
Feb 200812264292.538.77$16,919
Jan 200815574490.388.21$20,114
Dec 200710773588.337.30$14,818
Nov 200716073591.677.29$20,027
Oct 200712581282.856.92$15,977
Sep 200714390175.846.24$16,471
Aug 200712792369.066.39$14,667
Jul 200715294770.906.39$16,826
Jun 200715384862.007.55$15,887
May 200715698258.747.85$16,868
Apr 200714296459.617.81$15,989
Mar 200717997956.927.30$17,337
Feb 200715480555.108.22$15,099
Jan 200715891050.306.73$14,069
Dec 200615276456.656.92$13,896
Nov 200618474554.207.62$15,648
Oct 200615979554.906.01$13,510
Sep 200618472660.085.04$14,712
Aug 200614278668.717.34$15,526
Jul 20068593069.376.34$11,795
Jun 200616366466.286.38$15,043
May 20060066.016.42$0
Apr 20060064.397.36$0
Mar 20062601,02756.707.08$22,016
Feb 200619787557.597.75$18,127
Jan 200623976960.598.93$21,351
Dec 200519972754.9413.42$20,686
Nov 200525184154.6910.59$22,632
Oct 200524784258.3413.80$26,026
Sep 200522570261.4512.08$22,306
Aug 200524462961.519.80$21,171
Jul 200519970755.697.84$16,628
Jun 200522678752.337.38$17,635
May 200518473345.226.65$13,196
Apr 200511466349.207.36$10,489
Mar 200513966650.377.15$11,767
Feb 20057170245.226.31$7,642
Jan 200514874643.166.32$11,104
Dec 200412864439.866.75$9,450
Nov 2004068545.286.33$4,336
Oct 200416771249.706.52$12,939
Sep 200416572843.245.28$10,981
Aug 200416476642.375.55$11,200
Jul 200413977838.286.08$10,054
Jun 200416177936.106.43$10,823
May 200417581237.486.49$11,833
Apr 200417882234.475.86$10,951
Mar 200413971934.365.53$8,752
Feb 2004348032.455.51$1,544
Jan 2004278532.036.30$1,400
Dec 2003298230.266.30$1,394
Nov 2003408928.804.60$1,561
Oct 2003308328.174.76$1,240
Sep 2003487926.314.75$1,638
Aug 2003337729.765.13$1,377
Jul 2003358029.415.17$1,443
Jun 2003418228.565.98$1,662
May 2003337026.595.97$1,296
Apr 2003447326.675.41$1,568
Mar 2003376331.146.10$1,536
Feb 2003278033.487.93$1,538
Jan 2003379130.315.58$1,629
Dec 2002298226.914.85$1,178
Nov 2002329424.664.14$1,178
Oct 2002319326.464.23$1,214
Sep 20023611027.443.64$1,388
Aug 20023512725.963.16$1,310
Jul 20023613724.583.06$1,304
Jun 20023310623.733.34$1,137
May 2002259824.663.58$968
Apr 20022810823.653.51$1,042
Mar 20024311822.003.10$1,312
Feb 20022710218.222.38$734
Jan 20023711717.172.38$913
Dec 20014312216.932.36$1,016
Nov 20013612118.072.41$942
Oct 20013412619.782.53$991
Sep 20014612924.262.25$1,406
Aug 20013913124.873.05$1,370
Jul 20013912923.933.20$1,346
Jun 20013912124.563.82$1,421
May 20014612725.524.31$1,721
Apr 20013812324.685.34$1,594
Mar 20014512824.545.38$1,792
Feb 20013912127.755.77$1,780
Jan 20014012127.478.40$2,115
Dec 20003811526.889.12$2,071
Nov 20005812232.215.66$2,558
Oct 2000428931.235.15$1,770
Sep 20003913431.875.19$1,938
Aug 20004512629.644.54$1,906
Jul 20004613228.534.09$1,852
Jun 20004714029.304.40$1,993
May 20004714227.263.68$1,804
Apr 20004914224.513.12$1,643
Mar 20002513128.422.86$1,085
Feb 20003011427.622.73$1,139
Jan 20004613025.272.48$1,485
Dec 19993011624.282.42$1,010
Nov 19993810823.192.43$1,144
Oct 1999389720.982.80$1,069
Sep 1999379921.752.62$1,064
Aug 19994510519.262.88$1,169
Jul 19994711117.892.37$1,104
Jun 19993511315.942.36$825
May 19993513215.792.32$859
Apr 19994412515.102.21$940
Mar 19993712712.471.84$695
Feb 199938949.981.82$550
Jan 19994611410.381.90$694
Dec 1998341589.201.77$593
Nov 19984723810.892.19$1,032
Oct 19983829212.421.97$1,047
Sep 19983925512.592.08$1,022
Aug 19984029111.301.91$1,007
Jul 19984028711.742.24$1,112
Jun 19983218211.242.24$767
May 1998273212.622.21$411
Apr 1998333013.042.51$505
Mar 1998343112.802.31$507
Feb 1998282813.952.30$455
Jan 1998423114.702.15$684
Dec 19975313716.322.41$1,195
Nov 19975815118.193.09$1,521
Oct 19976815319.253.15$1,791
Sep 19975718317.742.95$1,552
Aug 19975520417.862.55$1,503
Jul 19976417017.582.25$1,507
Jun 19973318617.242.26$989
May 19975414418.972.31$1,357
Apr 19975113817.882.08$1,199
Mar 19974113918.951.94$1,046
Feb 19974313320.492.21$1,174
Jan 19975713123.483.54$1,802
Dec 19966112323.32—$1,423
Nov 19966312521.97—$1,384
Oct 19967712523.31—$1,795
Sep 19966513522.22—$1,444
Aug 19966814920.26—$1,378
Jul 19967113719.55—$1,388
Jun 19968823918.73—$1,648
May 19968722519.43—$1,690
Apr 19967323621.51—$1,570
Mar 19968626119.38—$1,667
Feb 19965315816.98—$900
Jan 19966626217.07—$1,127
Dec 199511141717.19—$1,908
Nov 199514045016.00—$2,240
Oct 19958951915.43—$1,373
Sep 199511352116.18—$1,828
Aug 19959951215.92—$1,576
Jul 19959344815.24—$1,417
Jun 199510937516.41—$1,789
May 19957529017.56—$1,317
Apr 199514257517.73—$2,518
Mar 199511854316.44—$1,940
Feb 199511351416.58—$1,874
Jan 199512448715.92—$1,974
Dec 199410960515.03—$1,638
Nov 199416169215.90—$2,560
Oct 199411783215.58—$1,823
Sep 199416276015.29—$2,477
Aug 199411584416.13—$1,855
Jul 199413570617.56—$2,371
Jun 199413747117.09—$2,341
May 199415430315.88—$2,446
Apr 199413230714.14—$1,866
Mar 199415532312.46—$1,931
Feb 199415729812.50—$1,963
Jan 199413634312.66—$1,722
Dec 199315349712.33—$1,886
Nov 199311259214.49—$1,623
Oct 199315869715.85—$2,504
Sep 199314372815.03—$2,149
Aug 199315772715.66—$2,459
Jul 199319075315.46—$2,937
Jun 199319362116.79—$3,240
May 199329536417.68—$5,216
Apr 199321839918.05—$3,935
Mar 199320434818.14—$3,701
Feb 199315431617.90—$2,757
Jan 199314535216.93—$2,455

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.

Dec 2010 — as filed, then multipliedworked
Oil                   87 bbl  × $ 85.73 =     $7,459
Casinghead gas         0 Mcf  × $  4.35 =         $0

────────────────────────────────────────────────────
Month total                                   $7,459

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/23433 is the state's own key, not one this site invented.