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GULF TUBB

Operated by MILLWEE OIL, INC. (P-5 569339) 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 21881District 08Field 80473310Hydrogen sulphide fieldNGPA filingOilCasinghead gasSaveExport
Value, all time
$4.4 M
Jan 1993 – May 2026
Value, last 12 filed months
$63 k
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”

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
NGPA3none——

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
OilDisposition59,913 bbl$2,700,983
Casinghead gasProduction538,485 Mcf$1,736,968
Total$4,437,951

141,849 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 (3)

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 31.4714, -102.6491. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.2 miles.

31.47141, -102.64911 · 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 3 wells
With a plug date
0.0%
0 of 3 wells
Median depth
3,510 ft
3 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.
3100.0%

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 3,500 and 3,512 ft, median 3,510 ft, over the 3 wells that filed a depth.

Completions filed
Dec 1981
1 of 3 wells; 2 filed none

3 wells

42-1033033213,512 ft———
42-1033034723,510 ft———
42-1033243533,500 ftDec 1981——

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 2026165098.932.87$16,323
Mar 20260089.753.15$0
Feb 2026155063.503.75$9,843
Jan 20260059.138.00$0
Dec 202515471256.664.41$11,868
Nov 20250058.593.93$0
Oct 20250059.383.30$0
Sep 2025169062.743.08$10,603
Aug 20250063.933.01$0
Jul 202516835166.743.32$12,376
Jun 2025054466.483.13$1,702
May 2025078860.553.23$2,547
Apr 2025167062.363.54$10,414
Mar 2025083767.704.27$3,573
Feb 202517577870.884.34$15,781
Jan 2025068774.324.28$2,939
Dec 202415620868.993.12$11,412
Nov 2024018269.052.20$400
Oct 202416151571.372.28$12,665
Sep 20241531169.612.36$10,676
Aug 20241541175.632.06$11,670
Jul 2024041679.932.15$893
Jun 202415773278.082.63$14,187
May 2024022878.812.20$501
Apr 2024051584.451.66$854
Mar 2024027480.301.55$423
Feb 2024023776.091.78$423
Jan 2024162073.023.30$11,829
Dec 2023155071.262.61$11,045
Nov 20231703777.892.81$13,345
Oct 202302085.443.09$62
Sep 20231582289.042.74$14,128
Aug 2023012780.522.67$339
Jul 202316117074.852.64$12,500
Jun 2023018868.962.26$425
May 202316822170.622.23$12,356
Apr 202315933678.122.24$13,173
Mar 2023046172.852.39$1,103
Feb 2023024875.112.47$611
Jan 2023033076.533.39$1,118
Dec 202217018576.415.73$14,050
Nov 202216413185.005.65$14,680
Oct 2022056887.185.86$3,331
Sep 2022048384.888.16$3,943
Aug 202215423294.529.13$16,674
Jul 20220154101.587.54$1,161
Jun 2022168486115.097.98$23,212
May 20220618109.378.43$5,212
Apr 2022152448104.226.84$18,905
Mar 20220634108.885.08$3,218
Feb 202215522791.054.86$15,216
Jan 2022033481.844.54$1,516
Dec 202115524671.323.90$12,014
Nov 2021016077.435.24$838
Oct 20211587979.795.71$13,058
Sep 20210069.865.35$0
Aug 2021154066.024.22$10,167
Jul 20210070.783.98$0
Jun 2021168069.493.38$11,674
May 20210063.483.02$0
Apr 2021142060.362.76$8,571
Mar 2021157061.302.72$9,624
Feb 20210057.805.55$0
Jan 2021166050.412.81$8,368
Dec 2020167044.642.68$7,455
Nov 20200038.772.71$0
Oct 2020171036.972.48$6,322
Sep 2020169037.091.99$6,268
Aug 2020164039.982.39$6,557
Jul 2020033538.371.83$611
Jun 202016263634.901.69$6,729
May 202017061816.921.81$3,998
Apr 202016575814.751.80$3,801
Mar 202017077630.341.86$6,598
Feb 2020038249.881.98$757
Jan 202017277757.252.09$11,475
Dec 201917274759.012.30$11,871
Nov 201917374355.302.75$11,611
Oct 2019078653.472.42$1,901
Sep 201916976555.052.66$11,336
Aug 201916985253.112.30$10,939
Jul 201914843856.272.46$9,405
Jun 2019059452.782.49$1,480
May 2019079358.482.74$2,173
Apr 201915980562.632.75$12,172
Mar 201917168556.803.06$11,810
Feb 2019060750.852.79$1,695
Jan 201915276646.033.23$9,469
Dec 201817479146.594.19$11,417
Nov 2018082052.934.24$3,475
Oct 201817267761.443.40$12,868
Sep 201817179759.543.11$12,658
Aug 201816358459.403.07$11,473
Jul 2018064165.142.93$1,879
Jun 201816264460.183.08$11,731
May 201831872865.382.90$22,903
Apr 2018051263.842.90$1,485
Mar 2018061761.222.79$1,719
Feb 2018063961.782.77$1,768
Jan 201817057862.874.01$13,005
Dec 2017071657.272.92$2,092
Nov 201716472555.423.12$11,350
Oct 2017042249.292.98$1,259
Sep 201717378047.523.09$10,629
Aug 201717190145.373.00$10,465
Jul 2017091343.873.09$2,819
Jun 201716890242.493.09$9,923
May 201716390245.373.26$10,339
Apr 201716888247.933.21$10,885
Mar 2017086846.772.98$2,590
Feb 201717077350.452.95$10,859
Jan 201717086349.413.42$11,350
Dec 201616383448.763.72$11,053
Nov 2016090742.492.64$2,398
Oct 201615094146.193.09$9,836
Sep 2016086041.553.10$2,667
Aug 201616591341.442.92$9,508
Jul 201617195741.622.92$9,916
Jun 201617390345.352.69$10,271
May 2016083642.521.99$1,665
Apr 201617188636.561.99$8,016
Mar 201616587433.011.79$7,015
Feb 2016084526.472.06$1,744
Jan 201616894327.352.36$6,824
Dec 2015084732.362.00$1,695
Nov 201517092838.792.17$8,606
Oct 2015093843.552.43$2,276
Sep 201516595342.992.76$9,722
Aug 201516593640.162.87$9,315
Jul 20151711,01948.152.95$11,235
Jun 201501,03856.152.88$2,992
May 20151621,02855.212.96$11,982
Apr 201516699849.822.71$10,971
Mar 20151611,00542.892.93$9,855
Feb 201517490844.662.98$10,473
Jan 2015091243.433.10$2,828
Dec 201417699354.693.59$13,192
Nov 201416798070.464.25$15,934
Oct 201417195578.303.90$17,115
Sep 2014093586.164.05$3,782
Aug 201415492989.394.04$17,515
Jul 201417492696.564.18$20,672
Jun 201416689798.164.74$20,544
May 201417087894.734.73$20,254
Apr 2014092295.944.81$4,434
Mar 201416598095.895.06$20,778
Feb 201416785897.406.19$21,579
Jan 201416193490.404.86$19,094
Dec 201317093591.824.35$19,681
Nov 2013076888.853.74$2,871
Oct 201316390697.423.78$19,304
Sep 2013169913104.113.72$20,989
Aug 20130949104.253.52$3,343
Jul 2013147838102.523.72$18,186
Jun 201315292194.403.93$17,971
May 201316392994.834.15$19,312
Apr 201316495093.964.28$19,478
Mar 201301,01493.623.91$3,968
Feb 201316491091.233.42$18,074
Jan 201316999791.603.42$18,890
Dec 20121601,00886.773.42$17,331
Nov 2012089486.953.62$3,241
Oct 20121641,03789.383.40$18,184
Sep 20121631,02294.672.92$18,414
Aug 20121641,11692.662.91$18,442
Jul 201201,07385.133.02$3,241
Jun 201216782979.822.52$15,418
May 20121581,01791.612.49$17,005
Apr 201201,044101.652.00$2,085
Mar 20121621,038105.052.22$19,325
Feb 2012167917101.102.57$19,241
Jan 201216898298.092.73$19,164
Dec 20111621,04496.873.24$19,075
Nov 2011099395.723.31$3,288
Oct 20111581,03384.983.65$17,196
Sep 20111671,01883.623.99$18,022
Aug 20111651,09583.404.15$18,305
Jul 20111591,19694.144.52$20,371
Jun 20111551,08292.904.64$19,420
May 2011095198.134.40$4,189
Apr 20111631,182105.964.33$22,393
Mar 20111591,18996.364.06$20,145
Feb 201116995785.644.18$18,473
Jan 20111711,17486.504.59$20,179
Dec 201001,11685.734.35$4,852
Nov 20101691,19880.843.80$18,209
Oct 20101661,19378.103.51$17,151
Sep 20101681,09672.633.98$16,563
Aug 20101431,15273.684.42$15,627
Jul 20101611,31372.554.74$17,900
Jun 20101571,22970.364.91$17,081
May 201001,19171.124.24$5,044
Apr 20101621,13781.694.12$17,921
Mar 20101611,24178.394.39$18,067
Feb 20101671,15273.585.44$18,557
Jan 201016195874.365.96$17,686
Dec 200916976471.445.48$16,263
Nov 200915989174.593.75$15,202
Oct 2009096672.544.11$3,971
Sep 200916087865.543.06$13,177
Aug 20091581,00167.423.22$13,874
Jul 20091631,03361.133.46$13,543
Jun 200916099466.163.90$14,457
May 20091661,05754.743.93$13,236
Apr 20091671,01446.773.59$11,448
Mar 20091631,00142.144.06$10,932
Feb 200916585432.814.63$9,370
Jan 200901,03735.865.37$5,570
Dec 20081631,11937.105.98$12,736
Nov 20081571,10255.496.86$16,272
Oct 20081471,10275.246.92$18,688
Sep 20081621,119101.767.88$25,300
Aug 20081591,185114.228.48$28,213
Jul 20081541,318131.0811.39$35,198
Jun 20081661,296131.3313.03$38,691
May 20081621,354123.1711.57$35,625
Apr 20081641,328110.3110.45$31,975
Mar 20081661,394101.909.66$30,387
Feb 20081641,26992.538.77$26,305
Jan 20081601,36890.388.21$25,686
Dec 20071681,40688.337.30$25,106
Nov 200701,41491.677.29$10,310
Oct 20071601,52782.856.92$23,826
Sep 20071591,52475.846.24$21,575
Aug 20073231,65269.066.39$32,859
Jul 20071561,75870.906.39$22,290
Jun 20071571,03362.007.55$17,532
May 200701,39558.747.85$10,946
Apr 20071581,38459.617.81$20,221
Mar 20071651,46056.927.30$20,053
Feb 20071641,34055.108.22$20,046
Jan 200701,46850.306.73$9,875
Dec 20061621,44856.656.92$19,195
Nov 20061621,46854.207.62$19,963
Oct 20061631,56354.906.01$18,348
Sep 20061581,54560.085.04$17,275
Aug 2006086468.717.34$6,342
Jul 20061591,63269.376.34$21,381
Jun 20061581,52966.286.38$20,233
May 20061621,60466.016.42$20,999
Apr 20061601,55164.397.36$21,719
Mar 20063141,60056.707.08$29,136
Feb 20061611,41557.597.75$20,240
Jan 20061601,56960.598.93$23,711
Dec 20051611,51054.9413.42$29,103
Nov 20051611,50454.6910.59$24,730
Oct 20051621,54058.3413.80$30,697
Sep 20051601,48661.4512.08$27,781
Aug 20051631,56561.519.80$25,358
Jul 20051641,60855.697.84$21,746
Jun 20051631,53852.337.38$19,882
May 20051761,61045.226.65$18,667
Apr 20051701,29849.207.36$17,918
Mar 20051601,62750.377.15$19,700
Feb 20051721,44145.226.31$16,873
Jan 20051661,52743.166.32$16,819
Dec 20041651,45939.866.75$16,427
Nov 20041701,60445.286.33$17,852
Oct 20041571,68749.706.52$18,794
Sep 20041631,62243.245.28$15,619
Aug 20041631,66142.375.55$16,126
Jul 20041641,55638.286.08$15,745
Jun 20041591,56936.106.43$15,833
May 20041561,69037.486.49$16,823
Apr 20041611,64734.475.86$15,199
Mar 20041641,64934.365.53$14,754
Feb 20041541,48832.455.51$13,196
Jan 20041611,62432.036.30$15,387
Dec 20033251,58930.266.30$19,848
Nov 200301,53328.804.60$7,044
Oct 20033311,52228.174.76$16,568
Sep 20031581,57626.314.75$11,642
Aug 20031591,65829.765.13$13,237
Jul 20031771,63929.415.17$13,681
Jun 20031611,60028.565.98$14,171
May 20031661,60126.595.97$13,976
Apr 20031641,64126.675.41$13,247
Mar 20031621,57731.146.10$14,658
Feb 20031661,57133.487.93$18,009
Jan 20031701,79230.315.58$15,156
Dec 20021671,82226.914.85$13,338
Nov 20021461,75124.664.14$10,844
Oct 20021641,84626.464.23$12,146
Sep 20023251,81927.443.64$15,530
Aug 20021621,89225.963.16$10,192
Jul 20021641,88224.583.06$9,793
Jun 20021621,82223.733.34$9,927
May 20021532,50424.663.58$12,747
Apr 20023252,58523.653.51$16,766
Mar 20021542,22322.003.10$10,285
Feb 20023261,93618.222.38$10,539
Jan 200202,73617.172.38$6,500
Dec 20011652,66716.932.36$9,099
Nov 20013242,48018.072.41$11,820
Oct 20011592,32919.782.53$9,035
Sep 20011672,10724.262.25$8,795
Aug 20011671,95724.873.05$10,128
Jul 20011651,92023.933.20$10,087
Jun 20011691,52424.563.82$9,979
May 20013341,86825.524.31$16,570
Apr 20011641,88724.685.34$14,115
Mar 20011681,89224.545.38$14,295
Feb 20011661,75127.755.77$14,705
Jan 20011711,95927.478.40$21,151
Dec 20001691,99526.889.12$22,742
Nov 20003281,99732.215.66$21,864
Oct 20001641,53631.235.15$13,025
Sep 20001631,89031.875.19$14,997
Aug 20001571,96729.644.54$13,585
Jul 20003251,98628.534.09$17,394
Jun 20001621,89629.304.40$13,084
May 20001602,01027.263.68$11,758
Apr 20001651,95824.513.12$10,145
Mar 20003332,06228.422.86$15,361
Feb 20001711,95727.622.73$10,059
Jan 20001672,16825.272.48$9,598
Dec 19991682,19324.282.42$9,394
Nov 19993421,96123.192.43$12,704
Oct 19991702,07820.982.80$9,393
Sep 19991672,00621.752.62$8,886
Aug 19993332,15219.262.88$12,602
Jul 19991642,19417.892.37$8,139
Jun 19993322,17615.942.36$10,432
May 19993332,20015.792.32$10,364
Apr 199901,95915.102.21$4,326
Mar 199902,06312.471.84$3,792
Feb 19991651,8149.981.82$4,944
Jan 199902,07810.381.90$3,948
Dec 19981632,1709.201.77$5,348
Nov 19981682,11010.892.19$6,441
Oct 19981652,18312.421.97$6,348
Sep 19981642,12812.592.08$6,497
Aug 19983312,28411.301.91$8,097
Jul 19981632,19211.742.24$6,818
Jun 19981691,89411.242.24$6,137
May 19981672,13112.622.21$6,809
Apr 19983322,04713.042.51$9,458
Mar 19981672,07012.802.31$6,918
Feb 19981721,94113.952.30$6,862
Jan 19981702,04314.702.15$6,901
Dec 19973372,09816.322.41$10,558
Nov 19971652,13118.193.09$9,582
Oct 19971682,17319.253.15$10,079
Sep 19972482,07617.742.95$10,534
Aug 19971682,25517.862.55$8,761
Jul 19973262,28317.582.25$10,861
Jun 19971652,21917.242.26$7,853
May 19971662,34818.972.31$8,569
Apr 19973322,32117.882.08$10,770
Mar 19971742,43518.951.94$8,019
Feb 19971752,00720.492.21$8,013
Jan 19971682,23823.483.54$11,866
Dec 19961692,36423.32—$3,941
Nov 19963442,22721.97—$7,558
Oct 19961662,44323.31—$3,869
Sep 19961682,43322.22—$3,733
Aug 19963482,44420.26—$7,050
Jul 19961612,54619.55—$3,148
Jun 19961662,39918.73—$3,109
May 19963242,41419.43—$6,295
Apr 19961702,40521.51—$3,657
Mar 19961662,48519.38—$3,217
Feb 19963312,33516.98—$5,620
Jan 19961662,48917.07—$2,834
Dec 19953352,47917.19—$5,759
Nov 19951622,22416.00—$2,592
Oct 19951672,84315.43—$2,577
Sep 19951722,76116.18—$2,783
Aug 19953362,96215.92—$5,349
Jul 19952842,91115.24—$4,328
Jun 19951632,86816.41—$2,675
May 19951612,90417.56—$2,827
Apr 19953292,83417.73—$5,833
Mar 19951662,91516.44—$2,729
Feb 19953272,62816.58—$5,422
Jan 19951642,92915.92—$2,611
Dec 19943272,97915.03—$4,915
Nov 19941643,02515.90—$2,608
Oct 19943283,10315.58—$5,110
Sep 19941613,08315.29—$2,462
Aug 19943223,27616.13—$5,194
Jul 19941653,33017.56—$2,897
Jun 19943283,24617.09—$5,606
May 19941623,24915.88—$2,573
Apr 19943273,09414.14—$4,624
Mar 19941673,10112.46—$2,081
Feb 19943362,91912.50—$4,200
Jan 19943303,35312.66—$4,178
Dec 19931653,30712.33—$2,034
Nov 19933303,31414.49—$4,782
Oct 19931593,39715.85—$2,520
Sep 19933283,38015.03—$4,930
Aug 19931623,67215.66—$2,537
Jul 19933163,62915.46—$4,885
Jun 19931583,44916.79—$2,653
May 19933313,65117.68—$5,852
Apr 19931663,44118.05—$2,996
Mar 19933413,53618.14—$6,186
Feb 19931633,34517.90—$2,918
Jan 19933293,72816.93—$5,570

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                  165 bbl  × $ 98.93 =    $16,323
Casinghead gas         0 Mcf  × $  2.87 =         $0

────────────────────────────────────────────────────
Month total                                  $16,323

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/21881 is the state's own key, not one this site invented.