MIDDLE MCCOWEN

Operated by MARATHON OIL EF LLC (P-5 525398) in the EAGLEVILLE (EAGLE FORD-1) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 15638District 01Field 27135700OilCasinghead gasSave
Value, all time
$2.19 bn
Aug 2011 – May 2026
Value, last 12 filed months
$277.1 M
at the published price for each month
Months reported
178
no gaps in the span
Streams
2
oil, casinghead gas

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
OilDisposition30,610,308 bbl$2,108,008,327
Casinghead gasProduction24,956,216 Mcf$81,893,960
Total$2,189,902,286

Wells on this lease (123)

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 28.6657, -98.3612. A lease has no coordinate of its own — that point is the mean of its wells, and they span 7.5 miles.

28.66678, -98.36886 · 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
0.8%
1 of 123 wells
With a plug date
0.8%
1 of 123 wells
Median depth
10,686 ft
123 wells filed one
Completion to plug
7 months
median over 1 wells

What the state filed about each well

On the RRC proration schedule
10.8%
A plug date is filed
10.8%
BothOn the schedule and plugged. Neither fact cancels the other.
10.8%
NeitherNo plug date, and not on the schedule.
12299.2%

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

0k
2k
4k
6k
8k
10k
12k
15k
20k+

Total depth in feet, 123 of 123 wells. Median 10,686 ft, with the middle half between 10,498 and 10,750 ft; the shallowest is 9,794 ft and the deepest 11,313 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

10s
20s

Last completion by decade, 123 of 123 wells, Jul 2011 – Aug 2025. This is the LAST completion filed on each wellbore, not the first — a well recompleted in 2019 counts once, in the 2010s.

Completions filed
Jul 2011 – Aug 2025
123 of 123 wells
Plug dates filed
Jul 2025
1 of 123 wells; 122 filed none

Last completion to plug: a median of 7 months across the 1 well that filed both dates, with the middle half between 7 months and 7 months. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

123 wells

42-01336194197H10,357 ftAug 2025
42-01336188139H10,660 ftAug 2025
42-01336189138H10,692 ftJul 2025
42-01336196137H10,643 ftJul 2025
42-01336195140H10,674 ftApr 2025
42-01336190136H10,690 ftApr 2025
42-01336191196H10,384 ftApr 2025
42-01336192195H10,361 ftApr 2025
42-01336193194H10,404 ftApr 2025
42-01336197191H10,652 ftMar 2025
42-01336198192H10,713 ftMar 2025
42-01336215133HR10,692 ftMar 2025
42-01336199133H10,592 ftDec 2024Jul 2025Yes
42-0133458021H10,859 ftJul 2024
42-01336106183H10,523 ftJun 2024
42-01336107184H10,487 ftMay 2024
42-01336101179H10,529 ftMay 2024
42-01336102176H10,500 ftMay 2024
42-01336103180H10,495 ftMay 2024
42-01336104181H10,515 ftMay 2024
42-01336105182H10,479 ftMay 2024
42-01336099178H10,467 ftMay 2024
42-01336100177H10,522 ftMay 2024
42-01336095105H10,507 ftMay 2024
42-01336097174H10,510 ftMay 2024
42-01336098175H10,528 ftMay 2024
42-01335071156H10,724 ftApr 2024
42-01335076110H10,748 ftApr 2024
42-01335078155H10,534 ftApr 2024
42-01335080121H10,736 ftApr 2024
42-01335070112H10,779 ftApr 2024
42-01336096274H10,542 ftApr 2024
42-01336091257H10,517 ftApr 2024
42-01336092259H10,547 ftApr 2024
42-01336093260H10,805 ftApr 2024
42-01336094103H10,726 ftApr 2024
42-01335072111H10,509 ftApr 2024
42-0133457722H11,068 ftMar 2024
42-0133457623H11,087 ftMar 2024
42-3113553467H10,868 ftDec 2023
42-3113693299H10,503 ftDec 2023
42-01335530158H9,794 ftNov 2023
42-3113673593H10,510 ftSep 2023
42-01335966289H10,710 ftSep 2023
42-01335967290H10,686 ftSep 2023
42-01335955122H10,646 ftSep 2023
42-01335957124H10,637 ftSep 2023
42-01335954120H10,703 ftSep 2023
42-01335956123H10,697 ftSep 2023
42-01335532166H9,884 ftAug 2023
42-01335952118H10,736 ftJul 2023
42-01335950116H10,743 ftJul 2023
42-01335953119H10,708 ftJul 2023
42-01335949115H10,695 ftJul 2023
42-01335951117H10,690 ftJul 2023
42-01335962312H10,790 ftJul 2023
42-01335960106H10,758 ftJul 2023
42-01335964114H10,740 ftJul 2023
42-01335963113H10,708 ftJul 2023
42-01335961311H10,753 ftJul 2023
42-01335965188H10,705 ftJun 2023
42-0133457824H10,735 ftJun 2023
42-3113553669H10,775 ftNov 2022
42-0133456919H11,059 ftAug 2022
42-013343711H11,112 ftJul 2022
42-3113553366H10,806 ftJul 2022
42-013344808H10,718 ftApr 2022
42-01335826186H10,492 ftFeb 2022
42-01335825185H10,532 ftFeb 2022
42-01335827187H10,531 ftFeb 2022
42-0133457020H10,749 ftDec 2021
42-0133472348H11,095 ftSep 2021
42-3113646189H10,490 ftSep 2021
42-3113661290H10,502 ftSep 2021
42-01335782173H10,053 ftMar 2021
42-01335781172H10,327 ftMar 2021
42-01335780171H10,300 ftMar 2021
42-0133448210H11,119 ftJan 2021
42-013344787H10,700 ftJan 2021
42-0133467537H10,737 ftDec 2020
42-0133467638H10,733 ftNov 2020
42-0133456616H11,079 ftAug 2020
42-0133472953H10,706 ftAug 2020
42-3113550765H11,296 ftJul 2020
42-3113673692H10,488 ftJun 2020
42-0133449618H9,916 ftMar 2020
42-3113661391H10,514 ftJan 2020
42-31136935102H10,469 ftNov 2019
42-31136934101H10,507 ftNov 2019
42-31136933100H10,470 ftNov 2019
42-3113673498H10,483 ftOct 2019
42-01335533167H9,874 ftJul 2018
42-01335531157H9,824 ftJul 2018
42-3113484915H10,491 ftApr 2017
42-013343854H11,100 ftApr 2017
42-013343863H11,118 ftApr 2017
42-0133448311H11,118 ftJan 2017
42-0133448412H11,082 ftJan 2017
42-0133493673H9,825 ftJan 2017
42-31136611190H10,506 ftDec 2016
42-3113646088H10,483 ftOct 2016
42-3113544357H10,767 ftOct 2016
42-3113553568H10,825 ftOct 2016
42-3113544558H10,801 ftSep 2016
42-0133472851H10,742 ftSep 2016
42-3113544256H10,750 ftJul 2016
42-31136462189H10,467 ftJul 2016
42-0133472449H10,721 ftFeb 2016
42-0133512671H10,186 ftNov 2015
42-0133493772H9,812 ftMay 2015
42-3113544155H10,775 ftMay 2015
42-3113550870H11,313 ftJan 2015
42-0133457925H10,749 ftJul 2014
42-0133467739H10,750 ftJun 2013
42-3113491213H11,200 ftJan 2013
42-3113491114H10,750 ftJan 2013
42-0133451829H10,359 ftNov 2012
42-0133452030H9,973 ftNov 2012
42-0133449517H10,398 ftSep 2012
42-013344765H10,672 ftAug 2012
42-013344819H11,059 ftAug 2012
42-013344776H10,637 ftAug 2012
42-013343842H11,076 ftJul 2011

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 (178)

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

178 months

May 2026221,367181,541106.413.05$24,108,607
Apr 2026240,199200,98298.932.87$24,339,649
Mar 2026292,166232,96089.753.15$26,955,592
Feb 2026244,295195,56763.503.75$16,246,171
Jan 2026275,926199,82359.138.00$17,913,673
Dec 2025300,622214,97956.664.41$17,982,022
Nov 2025308,172212,46858.593.93$18,890,040
Oct 2025362,223274,47559.383.30$22,415,898
Sep 2025374,636240,76562.743.08$24,245,477
Aug 2025351,112232,87863.933.01$23,148,661
Jul 2025447,327291,68966.743.32$30,821,611
Jun 2025437,527307,28466.483.13$30,048,201
May 2025647,914423,41260.553.23$40,599,796
Apr 2025616,276363,58362.363.54$39,719,190
Mar 2025305,485229,01567.704.27$21,658,844
Feb 2025251,120195,90370.884.34$18,649,769
Jan 2025323,267250,30874.324.28$25,096,191
Dec 2024365,999301,29968.993.12$26,190,737
Nov 2024390,280320,12969.052.20$27,652,618
Oct 2024451,531322,41571.372.28$32,961,325
Sep 2024479,158345,53469.612.36$34,171,155
Aug 2024581,497406,96775.632.06$44,818,447
Jul 2024681,387471,41079.932.15$55,475,187
Jun 2024818,698535,99278.082.63$65,335,732
May 2024701,339432,45678.812.20$56,223,255
Apr 2024287,689182,27884.451.66$24,597,772
Mar 2024167,782160,86380.301.55$13,721,449
Feb 2024205,272199,72076.091.78$15,975,375
Jan 2024234,181220,59873.023.30$17,827,354
Dec 2023254,837227,94271.262.61$18,754,777
Nov 2023277,781223,59877.892.81$22,264,127
Oct 2023327,791255,25785.443.09$28,794,513
Sep 2023365,154280,45689.042.74$33,280,371
Aug 2023444,167329,71180.522.67$36,645,605
Jul 2023558,068371,33674.852.64$42,752,385
Jun 2023716,963463,97168.962.26$50,489,638
May 2023429,408252,60770.622.23$30,887,450
Apr 202345,58758,09978.122.24$3,691,268
Mar 202367,27074,26172.852.39$5,078,338
Feb 202370,96169,92375.112.47$5,502,288
Jan 202381,64974,75576.533.39$6,501,847
Dec 202275,86570,88376.415.73$6,202,939
Nov 202276,33573,15585.005.65$6,901,523
Oct 202286,25387,51887.185.86$8,032,721
Sep 202290,99687,96884.888.16$8,441,883
Aug 202293,48688,85594.529.13$9,647,291
Jul 202284,48291,806101.587.54$9,274,090
Jun 202289,48292,523115.097.98$11,036,558
May 202293,266117,151109.378.43$11,188,441
Apr 2022102,589115,880104.226.84$11,484,167
Mar 2022112,145127,306108.885.08$12,856,604
Feb 2022106,595126,50291.054.86$10,320,128
Jan 2022118,413147,18381.844.54$10,358,789
Dec 2021128,708157,98671.323.90$9,795,461
Nov 2021137,039117,71577.435.24$11,227,386
Oct 2021146,207126,83079.795.71$12,390,547
Sep 2021158,715164,91669.865.35$11,970,282
Aug 2021145,715105,51166.024.22$10,065,423
Jul 2021190,833135,48270.783.98$14,046,660
Jun 202171,72077,72069.493.38$5,246,565
May 202189,87091,51663.483.02$5,981,113
Apr 2021104,671100,52860.362.76$6,595,240
Mar 2021119,233112,23161.302.72$7,613,908
Feb 202199,14086,79757.805.55$6,211,837
Jan 2021134,395118,94350.412.81$7,109,114
Dec 2020166,573132,16444.642.68$7,789,418
Nov 202089,17684,16538.772.71$3,685,152
Oct 202085,58480,41036.972.48$3,363,331
Sep 202085,43873,54837.091.99$3,315,332
Aug 202093,32783,75539.982.39$3,930,978
Jul 202095,17286,39338.371.83$3,809,427
Jun 202092,76786,78834.901.69$3,384,267
May 202099,17592,74716.921.81$1,846,354
Apr 202099,00595,68514.751.80$1,632,976
Mar 2020110,329102,60530.341.86$3,537,840
Feb 2020105,32495,69049.881.98$5,443,091
Jan 2020121,820119,66057.252.09$7,224,852
Dec 2019142,508123,80859.012.30$8,694,695
Nov 2019147,075133,64855.302.75$8,500,873
Oct 2019159,059149,20453.472.42$8,865,741
Sep 2019185,455109,41055.052.66$10,500,031
Aug 2019178,343103,80753.112.30$9,711,005
Jul 201960,93870,58856.272.46$3,602,632
Jun 201925,57586,27452.782.49$1,564,774
May 201987,76469,55558.482.74$5,323,042
Apr 201986,87973,84362.632.75$5,644,352
Mar 201999,275102,56656.803.06$5,952,887
Feb 201996,173102,35950.852.79$5,176,206
Jan 2019114,84389,38846.033.23$5,574,784
Dec 2018116,71090,39546.594.19$5,815,862
Nov 2018116,98676,70752.934.24$6,517,095
Oct 2018130,606108,53461.443.40$8,393,240
Sep 2018136,507112,61859.543.11$8,477,644
Aug 2018168,642117,87159.403.07$10,378,793
Jul 2018169,740140,70565.142.93$11,469,394
Jun 2018102,21262,40760.183.08$6,343,140
May 2018112,700114,81765.382.90$7,701,387
Apr 2018116,67491,34963.842.90$7,713,453
Mar 2018135,655118,47461.222.79$8,634,967
Feb 2018139,85399,19761.782.77$8,914,509
Jan 2018180,941152,51862.874.01$11,987,254
Dec 2017157,367118,47457.272.92$9,358,532
Nov 201758,84868,11855.423.12$3,473,773
Oct 201780,41885,25049.292.98$4,218,162
Sep 201789,27857,96747.523.09$4,421,451
Aug 201775,89473,22945.373.00$3,663,320
Jul 201789,39997,49843.873.09$4,222,938
Jun 201798,096108,08642.493.09$4,501,791
May 2017106,510108,57345.373.26$5,186,676
Apr 2017113,247105,58547.933.21$5,767,026
Mar 2017129,231112,58746.772.98$6,380,057
Feb 2017130,722111,05650.452.95$6,922,829
Jan 2017174,200133,44149.413.42$9,063,430
Dec 201694,085101,02548.763.72$4,963,684
Nov 201669,77663,44042.492.64$3,132,540
Oct 201689,40885,77646.193.09$4,394,826
Sep 201676,05078,97241.553.10$3,404,740
Aug 201697,888109,59141.442.92$4,376,960
Jul 2016100,17199,10541.622.92$4,458,934
Jun 201698,89874,61345.352.69$4,685,422
May 2016110,120100,65442.521.99$4,882,709
Apr 2016108,67074,21536.561.99$4,120,740
Mar 2016124,770103,14333.011.79$4,303,697
Feb 2016133,856118,76226.472.06$3,788,249
Jan 2016172,364134,64427.352.36$5,032,502
Dec 2015103,984104,17432.362.00$3,573,417
Nov 2015105,043119,78938.792.17$4,334,240
Oct 2015122,130129,52843.552.43$5,633,072
Sep 2015110,724110,61742.992.76$5,065,153
Aug 2015125,305119,77740.162.87$5,376,307
Jul 2015141,904151,96348.152.95$7,280,221
Jun 2015143,306149,92156.152.88$8,478,833
May 2015134,309119,62155.212.96$7,768,734
Apr 2015144,826131,51949.822.71$7,571,197
Mar 2015172,447153,46742.892.93$7,846,633
Feb 2015174,174143,64544.662.98$8,206,126
Jan 2015216,562170,11243.433.10$9,932,742
Dec 2014236,222189,11654.693.59$13,598,165
Nov 2014191,657146,66970.464.25$14,127,765
Oct 2014170,897145,24978.303.90$13,947,846
Sep 2014199,762169,95886.164.05$17,899,049
Aug 2014164,359123,71989.394.04$15,191,272
Jul 2014153,222118,12396.564.18$15,288,823
Jun 2014159,749144,59798.164.74$16,365,900
May 2014168,241145,34094.734.73$16,624,428
Apr 2014172,537157,10595.944.81$17,308,737
Mar 2014157,867125,57395.895.06$15,772,864
Feb 201470,53970,49097.406.19$7,306,973
Jan 2014103,48699,49390.404.86$9,838,742
Dec 2013108,239100,59791.824.35$10,376,553
Nov 2013122,745108,87288.853.74$11,312,887
Oct 2013120,22394,85897.423.78$12,070,627
Sep 2013116,411106,462104.113.72$12,515,347
Aug 2013153,662154,319104.253.52$16,562,869
Jul 2013191,187160,315102.523.72$20,196,501
Jun 201369,94682,44594.403.93$6,927,192
May 201391,016101,76294.834.15$9,053,266
Apr 2013108,784109,10293.964.28$10,688,584
Mar 2013128,893136,16593.623.91$12,599,759
Feb 2013149,050123,81991.233.42$14,021,281
Jan 201383,360122,36591.603.42$8,054,253
Dec 2012114,398107,64186.773.42$10,294,464
Nov 2012135,344133,27086.953.62$12,251,259
Oct 2012177,760138,84489.383.40$16,360,214
Sep 2012109,47592,95294.672.92$10,635,269
Aug 201262,29956,79892.662.91$5,937,803
Jul 201261,36856,55485.133.02$5,395,096
Jun 201240,56944,20379.822.52$3,349,567
May 201226,45236,63791.612.49$2,514,432
Apr 201215,83924,356101.652.00$1,658,668
Mar 201225,79522,441105.052.22$2,759,630
Feb 201227,05626,406101.102.57$2,803,231
Jan 201232,12324,35898.092.73$3,217,542
Dec 201133,92325,82996.873.24$3,369,800
Nov 201147,82839,10695.723.31$4,707,587
Oct 201187,99764,52984.983.65$7,713,422
Sep 201131,00912,07683.623.99$2,641,105
Aug 20110083.404.15$0

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              221,367 bbl  × $106.41 = $23,555,662
Casinghead gas   181,541 Mcf  × $  3.05 =   $552,945

────────────────────────────────────────────────────
Month total                              $24,108,607

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. 01/O/15638 is the state's own key, not one this site invented.