TAMMY

Operated by COG OPERATING LLC (P-5 166150) 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 16051District 7CField 85279200OilCasinghead gasSaveExport
Value, all time
$23.5 M
Oct 2006 – May 2026
Value, last 12 filed months
$36 k
at the published price for each month
Months reported
236
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 7,461 leases and 22,481 wells, and the rule below applies to all of them.

Discovered
1904-12-31
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 80 acres. The field rule took effect on 2016-03-08.

The Commission's schedule remark for this field reads: AREA) 85279200.

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
OilDisposition237,189 bbl$19,315,846
Casinghead gasProduction970,569 Mcf$4,232,865
Total$23,548,711

Wells on this lease (4)

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 31.4300, -102.0478. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.5 miles.

31.42955, -102.04784 · 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
75.0%
3 of 4 wells
With a plug date
75.0%
3 of 4 wells
Median depth
10,494 ft
4 wells filed one
Completion to plug
4.7 years
median over 3 wells

What the state filed about each well

On the RRC proration schedule
375.0%
A plug date is filed
375.0%
BothOn the schedule and plugged. Neither fact cancels the other.
375.0%
NeitherNo plug date, and not on the schedule.
125.0%

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 10,472 and 10,585 ft, median 10,494 ft, over the 4 wells that filed a depth.

Completions filed
Oct 2006 – Mar 2013
4 of 4 wells
Plug dates filed
Sep 2010 – May 2017
3 of 4 wells; 1 filed none

Last completion to plug: a median of 4.7 years across the 3 wells that filed both dates, with the middle half between 4.3 years and 7.3 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

4 wells

42-46138577310,585 ftMar 2013
42-46136703410,483 ftJul 2010Mar 2015Yes
42-46135272210,504 ftMay 2007May 2017Yes
42-46134905110,472 ftOct 2006Sep 2010Yes

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 (236)

Volume × price = value, one row per cycle. The price columns are the same series published on the prices page — nothing here is modelled.

236 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 202515122158.593.93$9,715
Oct 2025033059.383.30$1,091
Sep 202516533562.743.08$11,383
Aug 2025036163.933.01$1,088
Jul 202516036966.743.32$11,902
Jun 2025035966.483.13$1,123
May 2025036660.553.23$1,183
Apr 202516338562.363.54$11,529
Mar 2025037667.704.27$1,605
Feb 202516632370.884.34$13,168
Jan 2025042474.324.28$1,814
Dec 202418643068.993.12$14,174
Nov 2024041469.052.20$910
Oct 202417744271.372.28$13,641
Sep 2024043969.612.36$1,038
Aug 202416534475.632.06$13,189
Jul 2024010079.932.15$215
Jun 202415830878.082.63$13,148
May 20240078.812.20$0
Apr 202415847684.451.66$14,133
Mar 2024047180.301.55$728
Feb 202416443276.091.78$13,249
Jan 2024036373.023.30$1,197
Dec 202318248871.262.61$14,243
Nov 2023047977.892.81$1,345
Oct 202317049685.443.09$16,056
Sep 202315650489.042.74$15,269
Aug 2023053980.522.67$1,441
Jul 202316856074.852.64$14,054
Jun 2023053568.962.26$1,208
May 202317658070.622.23$13,721
Apr 2023054478.122.24$1,217
Mar 202322061772.852.39$17,504
Feb 2023061575.112.47$1,516
Jan 202317968176.533.39$16,006
Dec 202224967076.415.73$22,865
Nov 2022064385.005.65$3,631
Oct 2022064787.185.86$3,794
Sep 202222461884.888.16$24,058
Aug 2022063994.529.13$5,832
Jul 2022262682101.587.54$31,758
Jun 20220668115.097.98$5,329
May 20220689109.378.43$5,810
Apr 2022258686104.226.84$31,579
Mar 20220589108.885.08$2,990
Feb 202228814891.054.86$26,942
Jan 2022050581.844.54$2,292
Dec 202126965171.323.90$21,723
Nov 2021062577.435.24$3,273
Oct 202126553879.795.71$24,218
Sep 2021050269.865.35$2,686
Aug 2021046666.024.22$1,967
Jul 202131846170.783.98$24,344
Jun 2021056269.493.38$1,900
May 2021054663.483.02$1,648
Apr 202129543660.362.76$19,009
Mar 202132947761.302.72$21,464
Feb 2021034057.805.55$1,886
Jan 2021037350.412.81$1,048
Dec 2020047644.642.68$1,274
Nov 202016147938.772.71$7,538
Oct 2020041636.972.48$1,031
Sep 2020038437.091.99$765
Aug 202027139839.982.39$11,784
Jul 2020038938.371.83$710
Jun 2020035734.901.69$603
May 202025149516.921.81$5,145
Apr 2020061414.751.80$1,108
Mar 2020082230.341.86$1,526
Feb 202054574149.881.98$28,652
Jan 2020080457.252.09$1,684
Dec 2019083659.012.30$1,926
Nov 2019081155.302.75$2,231
Oct 201925688553.472.42$15,829
Sep 2019083955.052.66$2,229
Aug 201923076753.112.30$13,983
Jul 2019087256.272.46$2,145
Jun 201923584252.782.49$14,501
May 2019086358.482.74$2,365
Apr 201923678362.632.75$16,934
Mar 201922878756.803.06$15,360
Feb 2019075050.852.79$2,094
Jan 2019077846.033.23$2,512
Dec 2018091546.594.19$3,830
Nov 201824391252.934.24$16,726
Oct 201838192061.443.40$26,535
Sep 2018085759.543.11$2,664
Aug 2018088059.403.07$2,699
Jul 201841786065.142.93$29,685
Jun 2018080560.183.08$2,477
May 2018090465.382.90$2,622
Apr 2018084763.842.90$2,457
Mar 201839187161.222.79$26,364
Feb 2018078361.782.77$2,166
Jan 201824887462.874.01$19,096
Dec 201729087257.272.92$19,156
Nov 2017087155.423.12$2,716
Oct 201723782249.292.98$14,134
Sep 201720582247.523.09$12,279
Aug 2017092145.373.00$2,767
Jul 201722882343.873.09$12,543
Jun 201723191242.493.09$12,631
May 201777498545.373.26$38,331
Apr 2017032147.933.21$1,031
Mar 201704446.772.98$131
Feb 2017070050.452.95$2,067
Jan 201739878349.413.42$22,342
Dec 2016077048.763.72$2,867
Nov 2016079542.492.64$2,102
Oct 201636979846.193.09$19,510
Sep 2016026641.553.10$825
Aug 20160041.442.92$0
Jul 2016364041.622.92$15,150
Jun 2016027445.352.69$736
May 201636573942.521.99$16,991
Apr 201636373436.561.99$14,733
Mar 2016068633.011.79$1,231
Feb 201635933826.472.06$10,200
Jan 20160027.352.36$0
Dec 201505032.362.00$100
Nov 201536228538.792.17$14,660
Oct 201518625143.552.43$8,709
Sep 201536015642.992.76$15,907
Aug 2015010040.162.87$287
Jul 201534013648.152.95$16,772
Jun 201504,19456.152.88$12,091
May 20157114,76755.212.96$53,343
Apr 20153424,66349.822.71$29,659
Mar 20157405,09642.892.93$46,694
Feb 20153485,08544.662.98$30,676
Jan 20153465,74643.433.10$32,843
Dec 20148796,12554.693.59$70,070
Nov 20143676,04070.464.25$51,540
Oct 20147436,65478.303.90$84,134
Sep 20147406,62886.164.05$90,572
Aug 20147367,07489.394.04$94,335
Jul 20147427,29796.564.18$102,146
Jun 20141,1137,15798.164.74$143,154
May 20141,1137,18694.734.73$139,400
Apr 20141,4769,58195.944.81$187,684
Mar 20141,49611,76095.895.06$202,919
Feb 20142,26311,20697.406.19$289,804
Jan 20141,8838,74490.404.86$212,725
Dec 20131,1327,46391.824.35$136,438
Nov 20131,8779,11488.853.74$200,842
Oct 20132,60210,79797.423.78$294,293
Sep 20132,2139,289104.113.72$264,930
Aug 20132,6039,301104.253.52$304,127
Jul 20133,73311,546102.523.72$425,632
Jun 20135,01913,05694.403.93$525,148
May 20135,72111,27994.834.15$589,320
Apr 20133,5897,16093.964.28$367,886
Mar 20133721,33193.623.91$40,035
Feb 20133781,60191.233.42$39,960
Jan 20137521,56491.603.42$74,232
Dec 20125624,40486.773.42$63,827
Nov 20127433,87986.953.62$78,665
Oct 20127445,89389.383.40$86,533
Sep 20127355,60094.672.92$85,925
Aug 20127405,83992.662.91$85,549
Jul 20129276,22085.133.02$97,705
Jun 20125455,35779.822.52$56,996
May 20129224,04391.612.49$94,525
Apr 20123575,398101.652.00$47,068
Mar 20121,3208,491105.052.22$157,534
Feb 20121,69440,213101.102.57$274,620
Jan 20121,10333,95098.092.73$201,015
Dec 20112,04922,37596.873.24$270,976
Nov 20111,27727,25295.723.31$212,473
Oct 20111,47014,34584.983.65$177,259
Sep 20113671,75183.623.99$37,668
Aug 20117432,42483.404.15$72,024
Jul 20111,49125,53094.144.52$255,688
Jun 20113,05759,60492.904.64$560,551
May 20114,95763,18998.134.40$764,767
Apr 20114,83441,644105.964.33$692,666
Mar 20118,17743,51296.364.06$964,479
Feb 20117,68124,04485.644.18$758,304
Jan 201111,56922,72786.504.59$1,105,008
Dec 201010,31213,39885.734.35$942,299
Nov 20108,4807,32480.843.80$713,320
Oct 201012,3709,90478.103.51$1,000,849
Sep 201014,06213,97372.633.98$1,076,928
Aug 20109,26211,31673.684.42$732,434
Jul 20104,8526,54972.554.74$383,032
Jun 201038363070.364.91$30,041
May 201019055371.124.24$15,855
Apr 201018755381.694.12$17,556
Mar 201038667478.394.39$33,217
Feb 201018469873.585.44$17,337
Jan 201035975774.365.96$31,210
Dec 200935774571.445.48$29,589
Nov 20095251,11974.593.75$43,358
Oct 20097111,64872.544.11$58,350
Sep 20098671,68965.543.06$62,000
Aug 20097081,77767.423.22$53,453
Jul 20091,0601,82261.133.46$71,110
Jun 20097121,33266.163.90$52,294
May 200970993154.743.93$42,466
Apr 20091,06679546.773.59$52,709
Mar 200970988642.144.06$33,474
Feb 20091,13194232.814.63$41,472
Jan 20097191,19535.865.37$32,202
Dec 20089111,46637.105.98$42,561
Nov 20088901,63355.496.86$60,589
Oct 20089191,45075.246.92$79,182
Sep 20081,1145,848101.767.88$159,426
Aug 20088964,990114.228.48$144,671
Jul 20081,0572,408131.0811.39$165,977
Jun 20081,0582,488131.3313.03$171,372
May 20081,2372,859123.1711.57$185,452
Apr 20081,2543,133110.3110.45$171,084
Mar 20081,0753,507101.909.66$143,434
Feb 20081,2663,42392.538.77$147,165
Jan 20082,1434,00290.388.21$226,524
Dec 20071,2574,13088.337.30$141,188
Nov 20071,9718,62791.677.29$243,587
Oct 20073,71210,42182.856.92$379,673
Sep 20073,0064,83575.846.24$258,166
Aug 20073,6895,96269.066.39$292,847
Jul 20077124,06270.906.39$76,429
Jun 20071,2343,57962.007.55$103,524
May 20071,2324,83658.747.85$110,312
Apr 20076976,15859.617.81$89,613
Mar 20071,3078,04056.927.30$133,102
Feb 20071,5278,81255.108.22$156,537
Jan 20073,6615,70550.306.73$222,525
Dec 20064,5255,85156.656.92$296,821
Nov 20062,0131,89054.207.62$123,502
Oct 20063,0873,31954.906.01$189,436

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.

Nov 2025 — as filed, then multipliedworked
Oil                  151 bbl  × $ 58.59 =     $8,847
Casinghead gas       221 Mcf  × $  3.93 =       $868

────────────────────────────────────────────────────
Month total                                   $9,715

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. 7C/O/16051 is the state's own key, not one this site invented.