MARY

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 15535District 7CField 85279200OilCasinghead gasSaveExport
Value, all time
$50.5 M
Jun 2004 – May 2026
Value, last 12 filed months
$890 k
at the published price for each month
Months reported
264
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
OilDisposition660,900 bbl$42,613,867
Casinghead gasProduction2,109,817 Mcf$7,849,504
Total$50,463,371

Wells on this lease (8)

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 31.3979, -102.0358. A lease has no coordinate of its own — that point is the mean of its wells, and they span 1.0 miles.

31.39876, -102.03643 · 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
12.5%
1 of 8 wells
With a plug date
12.5%
1 of 8 wells
Median depth
10,473 ft
8 wells filed one
Completion to plug
7.2 years
median over 1 well

What the state filed about each well

On the RRC proration schedule
112.5%
A plug date is filed
112.5%
BothOn the schedule and plugged. Neither fact cancels the other.
112.5%
NeitherNo plug date, and not on the schedule.
787.5%

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, 8 of 8 wells. Median 10,473 ft, with the middle half between 10,138 and 10,501 ft; the shallowest is 9,025 ft and the deepest 10,550 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, 8 of 8 wells, Jun 2006 – Dec 2015. This is the LAST completion filed on each wellbore, not the first — a well recompleted in 2019 counts once, in the 2010s.

Completions filed
Jun 2006 – Dec 2015
8 of 8 wells
Plug dates filed
May 2018
1 of 8 wells; 7 filed none

Last completion to plug: a median of 7.2 years across the 1 well that filed both dates, with the middle half between 7.2 years and 7.2 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

8 wells

42-46139692510,480 ftDec 2015
42-46139848212H9,230 ftMar 2015
42-46138877211H9,025 ftJan 2014
42-461369073A10,440 ftMar 2011May 2018Yes
42-46136780410,485 ftOct 2010
42-46134523110,550 ftJun 2006
42-46134572210,550 ftJun 2006
42-46134573310,465 ftJun 2006

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 (264)

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

264 months

May 20266427,507106.413.05$91,180
Apr 20267107,31298.932.87$91,224
Mar 20267187,28189.753.15$87,372
Feb 20266816,33863.503.75$67,013
Jan 20266815,95359.138.00$87,879
Dec 20258566,41556.664.41$76,813
Nov 20257025,98858.593.93$64,642
Oct 20258175,94759.383.30$68,167
Sep 20256175,54862.743.08$55,781
Aug 20258025,02463.933.01$66,418
Jul 20256765,14166.743.32$62,160
Jun 20258484,68666.483.13$71,036
May 20258544,48560.553.23$66,207
Apr 20259383,50062.363.54$70,895
Mar 20256592,25367.704.27$54,231
Feb 20256521,45970.884.34$52,547
Jan 20251,0412,14874.324.28$86,558
Dec 20249691,36268.993.12$71,103
Nov 202461165069.052.20$43,619
Oct 202462561571.372.28$46,009
Sep 202465150469.612.36$46,508
Aug 202450969075.632.06$39,920
Jul 202465169379.932.15$53,522
Jun 202460198878.082.63$49,528
May 2024590078.812.20$46,498
Apr 20249741,23884.451.66$84,308
Mar 202459177180.301.55$48,649
Feb 202478787376.091.78$61,440
Jan 20241,1631,04473.023.30$88,365
Dec 202332049371.262.61$24,090
Nov 20235561,23877.892.81$46,783
Oct 20237701,56185.443.09$70,608
Sep 20236781,65389.042.74$64,890
Aug 20237892,14880.522.67$69,272
Jul 20238802,10774.852.64$71,434
Jun 20238381,73868.962.26$61,714
May 20239171,34570.622.23$67,754
Apr 20238272,07278.122.24$69,242
Mar 20238592,11372.852.39$67,635
Feb 20239251,52875.112.47$73,244
Jan 20239401,51076.533.39$77,054
Dec 20229341,65576.415.73$80,849
Nov 20228881,35085.005.65$83,102
Oct 20229981,74587.185.86$97,238
Sep 20221,0301,61384.888.16$100,594
Aug 20226831,30394.529.13$76,450
Jul 20229791,429101.587.54$110,224
Jun 20221,0821,721115.097.98$138,256
May 20221,3452,398109.378.43$167,325
Apr 20221,0601,675104.226.84$121,926
Mar 2022659977108.885.08$76,712
Feb 20229361,17191.054.86$90,913
Jan 20229421,23781.844.54$82,706
Dec 202180999871.323.90$61,589
Nov 202167797077.435.24$57,500
Oct 202180089679.795.71$68,952
Sep 20211,6931,29269.865.35$125,186
Aug 202126587166.024.22$21,171
Jul 20216392,31570.783.98$54,447
Jun 20211,2903,19469.493.38$100,440
May 20211,0853,06763.483.02$78,131
Apr 20211,4782,92660.362.76$97,283
Mar 20211,5712,89461.302.72$104,165
Feb 20217001,25057.805.55$47,395
Jan 20211,3962,76050.412.81$78,129
Dec 20201,5102,60344.642.68$74,371
Nov 20201,4252,37938.772.71$61,686
Oct 20201,3873,04536.972.48$58,824
Sep 20201,3642,09937.091.99$54,770
Aug 20201,4602,74139.982.39$64,908
Jul 20201,3152,27338.371.83$54,605
Jun 20201,4301,88134.901.69$53,086
May 20201,2831,81416.921.81$25,000
Apr 20201,2351,31914.751.80$20,596
Mar 20201,1411,07430.341.86$36,612
Feb 20201,1441,05949.881.98$59,160
Jan 20201,41195357.252.09$82,776
Dec 20199479859.012.30$7,386
Nov 201916334455.302.75$9,960
Oct 20191,67911,51553.472.42$117,626
Sep 20191,74512,32255.052.66$128,805
Aug 20191,80312,22053.112.30$123,917
Jul 20191,74811,90856.272.46$127,654
Jun 20191,69711,50352.782.49$118,224
May 20192,21112,40958.482.74$163,304
Apr 20191,48610,91462.632.75$123,089
Mar 20192,21617,97856.803.06$180,919
Feb 20192,14516,32950.852.79$154,667
Jan 20192,74217,65846.033.23$183,217
Dec 20182,60218,04046.594.19$196,733
Nov 20182,37316,85752.934.24$197,030
Oct 20182,51518,33461.443.40$216,822
Sep 20182,24917,38959.543.11$187,950
Aug 20182,26520,31459.403.07$196,835
Jul 20182,70822,10665.142.93$241,211
Jun 20182,44620,66060.183.08$210,769
May 20183,00519,14365.382.90$251,997
Apr 20182,91518,97263.842.90$241,128
Mar 20183,68418,89861.222.79$278,200
Feb 20183,12815,30961.782.77$235,594
Jan 20183,21517,71962.874.01$273,168
Dec 20174,01118,77857.272.92$284,570
Nov 20173,54918,63455.423.12$254,793
Oct 20173,84720,20849.292.98$249,913
Sep 20174,38919,36747.523.09$268,357
Aug 20174,09420,22645.373.00$246,512
Jul 20173,88720,92743.873.09$235,130
Jun 20171,56620,44642.493.09$129,662
May 20177,26920,29345.373.26$396,019
Apr 20174,52120,11147.933.21$281,280
Mar 20174,28117,76546.772.98$253,227
Feb 20174,34716,56150.452.95$268,204
Jan 20175,24817,96449.413.42$320,719
Dec 20165,40520,98048.763.72$341,653
Nov 20165,50121,68242.492.64$291,072
Oct 20165,63622,61646.193.09$330,216
Sep 20165,87323,45541.553.10$316,748
Aug 20166,04625,67941.442.92$325,640
Jul 20165,88425,66141.622.92$319,934
Jun 20165,74328,26145.352.69$336,349
May 20166,67729,07242.521.99$341,790
Apr 20167,40436,19936.561.99$342,764
Mar 201611,53243,07633.011.79$457,950
Feb 20168,78621,41726.472.06$276,762
Jan 201614,72826,45127.352.36$465,350
Dec 20157,63118,47632.362.00$283,917
Nov 20156,08013,71438.792.17$265,566
Oct 20154,75612,73543.552.43$238,026
Sep 20156,76619,85142.992.76$345,628
Aug 20157,37823,26640.162.87$363,132
Jul 20159,14528,29048.152.95$523,648
Jun 201512,48436,86756.152.88$807,259
May 201510,60517,35955.212.96$636,806
Apr 201514,67318,63249.822.71$781,438
Mar 20154,1015,50342.892.93$192,042
Feb 20152,9449,17644.662.98$158,789
Jan 20153,3266,90643.433.10$165,861
Dec 20143,1707,66354.693.59$200,888
Nov 20143,72510,26770.464.25$306,117
Oct 20144,99411,80978.303.90$437,097
Sep 20141,9858,65586.164.05$206,041
Aug 20144,78116,59789.394.04$494,344
Jul 20145,47218,20696.564.18$604,470
Jun 20146,44618,67098.164.74$721,177
May 20147,21721,14294.734.73$783,595
Apr 20147,99518,19595.944.81$854,542
Mar 201415,69533,51295.895.06$1,674,457
Feb 20149,94613,37097.406.19$1,051,527
Jan 20141,5393,61590.404.86$156,697
Dec 20131,1257,55391.824.35$136,187
Nov 20131,14010,81788.853.74$141,726
Oct 20131,12511,40897.423.78$152,712
Sep 20131,10611,721104.113.72$158,721
Aug 20131,30313,952104.253.52$184,985
Jul 20131,49314,021102.523.72$205,189
Jun 20131,48013,94094.403.93$194,544
May 20131,85315,53994.834.15$240,193
Apr 20131,49015,07793.964.28$204,569
Mar 20132,78315,63593.623.91$321,722
Feb 20131,50812,52091.233.42$180,392
Jan 20132,63212,67591.603.42$284,439
Dec 20122,63813,63186.773.42$275,519
Nov 20122,62610,89786.953.62$267,832
Oct 20122,2439,32889.383.40$232,192
Sep 20122,9918,81594.672.92$308,884
Aug 20122,5858,87792.662.91$265,342
Jul 20123,3639,09385.133.02$313,760
Jun 20122,9567,96279.822.52$256,005
May 20123,4647,76491.612.49$336,656
Apr 20123,2639,086101.652.00$349,827
Mar 20123,8668,236105.052.22$424,424
Feb 20122,6185,707101.102.57$279,348
Jan 20123,3286,60698.092.73$344,505
Dec 20113,3706,80296.873.24$348,489
Nov 20113,7066,25595.723.31$375,450
Oct 20113,7067,05784.983.65$340,684
Sep 20113,1926,69483.623.99$293,596
Aug 20114,0737,68683.404.15$371,580
Jul 20114,3978,15194.144.52$450,754
Jun 20114,2469,20192.904.64$437,145
May 20115,55015,85398.134.40$614,451
Apr 20117,98515,100105.964.33$911,523
Mar 20114,0616,84796.364.06$419,099
Feb 20113,3054,36185.644.18$301,269
Jan 20115,6527,11386.504.59$521,538
Dec 20105,8616,39485.734.35$530,263
Nov 20105,0495,87280.843.80$430,447
Oct 20101,3332,59378.103.51$113,206
Sep 20103711,95172.633.98$34,710
Aug 20105662,06873.684.42$50,842
Jul 20103752,09672.554.74$37,134
Jun 20105652,06270.364.91$49,879
May 20103922,01671.124.24$36,417
Apr 20105762,01681.694.12$55,365
Mar 20105542,09978.394.39$52,640
Feb 20105471,81373.585.44$50,115
Jan 20107202,03074.365.96$65,646
Dec 20095412,23171.445.48$50,883
Nov 20095352,27174.593.75$48,425
Oct 20097062,47172.544.11$61,370
Sep 20097222,41465.543.06$54,718
Aug 20095221,83467.423.22$41,096
Jul 20096821,95961.133.46$48,478
Jun 20097122,71166.163.90$57,665
May 20093552,04154.743.93$27,445
Apr 20098872,33546.773.59$49,862
Mar 20095352,44142.144.06$32,453
Feb 20091931,76132.814.63$14,491
Jan 20093762,33635.865.37$26,030
Dec 20089192,37737.105.98$48,303
Nov 20085462,51655.496.86$47,558
Oct 20085451,15775.246.92$49,015
Sep 20087311,387101.767.88$85,312
Aug 20087141,485114.228.48$94,150
Jul 20088831,675131.0811.39$134,821
Jun 20081,7792,287131.3313.03$263,442
May 20081,0712,364123.1711.57$159,277
Apr 20081,5842,329110.3110.45$199,080
Mar 20081,4412,329101.909.66$169,346
Feb 20081,7822,34092.538.77$185,412
Jan 20082,3292,46190.388.21$230,689
Dec 20071,4322,51888.337.30$144,875
Nov 20071,9562,54991.677.29$197,893
Oct 20071,2434,16182.856.92$131,785
Sep 20071,5824,96475.846.24$150,975
Aug 20071,9125,01369.066.39$164,065
Jul 20071,5904,60570.906.39$142,147
Jun 20071,6104,02062.007.55$130,165
May 20072,2194,60658.747.85$166,484
Apr 20071,4244,72159.617.81$121,733
Mar 20071,6713,00856.927.30$117,078
Feb 20077351,37155.108.22$51,763
Jan 20071,0901,52350.306.73$65,072
Dec 20061,0611,66256.656.92$71,604
Nov 20061,0961,68254.207.62$72,216
Oct 20068861,94954.906.01$60,362
Sep 20061,2712,07760.085.04$86,824
Aug 20061,6392,90768.717.34$133,953
Jul 20062,2734,19069.376.34$184,254
Jun 200655442966.286.38$39,458
May 200656438466.016.42$39,697
Apr 20061,3104,41964.397.36$116,877
Mar 20061,7035,02556.707.08$132,152
Feb 20061,4934,85857.597.75$123,637
Jan 20061,6585,95060.598.93$153,611
Dec 20051,8375,46154.9413.42$174,186
Nov 20052,0145,48954.6910.59$168,265
Oct 20051,5655,07058.3413.80$161,247
Sep 20052,2495,70961.4512.08$207,160
Aug 20052,3986,56361.519.80$211,798
Jul 20052,0882,46255.697.84$135,592
Jun 20051,7592,37852.337.38$109,601
May 20052,6537,36445.226.65$168,948
Apr 20053,0156,95949.207.36$199,560
Mar 20054,4199,87150.377.15$293,211
Feb 20054,9827,64145.226.31$273,515
Jan 20053,9072,17243.166.32$182,358
Dec 20042,0652,98039.866.75$102,429
Nov 20044,4673,98345.286.33$227,480
Oct 20042,0163,40949.706.52$122,405
Sep 20042,6504,50843.245.28$138,406
Aug 20044,3785,25542.375.55$214,665
Jul 20045,3748,42538.286.08$256,976
Jun 2004021536.106.43$1,383

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                  642 bbl  × $106.41 =    $68,315
Casinghead gas     7,507 Mcf  × $  3.05 =    $22,865

────────────────────────────────────────────────────
Month total                                  $91,180

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/15535 is the state's own key, not one this site invented.