MAYO, J. H.

Operated by MOUNTAIN CREEK OIL COMPANY, INC. (P-5 592053) in the CLAY COUNTY REGULAR field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 18802District 09Field 18707001OilCasinghead gasSaveExport
Value, all time
$1.7 M
Jan 1993 – May 2026
Value, last 12 filed months
$60 k
at the published price for each month
Months reported
401
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 615 leases and 2,793 wells, and the rule below applies to all of them.

Discovered
1902-12-31
as the register files it
Field class
Oil and gas
the register's own label
Between wells
no field rule filed
From a lease line
no field rule filed

The Commission's schedule remark for this field reads: ENTITY FOR DENSITY APPROVED 3/17/98

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
OilDisposition36,583 bbl$1,704,557
Casinghead gasProduction134 Mcf$346
Total$1,704,903

47 Mcf of this lease's gas, across 47 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 (25)

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 34.0046, -98.2251. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.4 miles.

34.00546, -98.22549 · 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
24.0%
6 of 25 wells
With a plug date
24.0%
6 of 25 wells
Median depth
1,030 ft
19 wells filed one
Completion to plug
12.0 years
median over 6 wells

What the state filed about each well

On the RRC proration schedule
624.0%
A plug date is filed
624.0%
BothOn the schedule and plugged. Neither fact cancels the other.
624.0%
NeitherNo plug date, and not on the schedule.
1976.0%

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

Total depth in feet, 19 of 25 wells. Median 1,030 ft, with the middle half between 414 and 1,049 ft; the shallowest is 190 ft and the deepest 1,999 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, 25 of 25 wells, Feb 1978 – Jul 2006. This is the LAST completion filed on each wellbore, not the first — a well recompleted in 2019 counts once, in the 2010s.

Completions filed
Feb 1978 – Jul 2006
25 of 25 wells
Plug dates filed
May 1996 – Jan 2012
6 of 25 wells; 19 filed none

Last completion to plug: a median of 12.0 years across the 6 wells that filed both dates, with the middle half between 7.2 years and 16.4 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

25 wells

42-077349484A1,064 ftJul 2006Sep 2011Yes
42-077349463A1,066 ftJul 2006Jan 2012Yes
42-077349422A1,074 ftMay 2006
42-077349411A1,019 ftMay 2006
42-07731362141,050 ftJul 1998
42-07731309101,037 ftSep 1987
42-07734148211,047 ftApr 1987
42-077333440201,999 ftOct 1984
42-077310541417 ftMay 1984May 1996Yes
42-07731727161,030 ftMay 1984May 1996Yes
42-0773280819410 ftNov 1982
42-07732788181,040 ftOct 1982
42-07732574171,045 ftMar 1982
42-0773148015190 ftSep 1979
42-0773132111900 ftSep 1979Aug 1997Yes
42-0773134513Mar 1979
42-0773134612Mar 1979
42-077312979Nov 1978
42-077311898280 ftOct 1978
42-077311907Sep 1978
42-077311416427 ftAug 1978
42-077311154Aug 1978
42-077311145360 ftMar 1978Aug 1997Yes
42-077310703Feb 1978
42-077310712409 ftFeb 1978

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 2026690106.413.05$7,342
Apr 2026102098.932.87$10,091
Mar 20260089.753.15$0
Feb 202680063.503.75$5,080
Jan 2026103059.138.00$6,090
Dec 20250056.664.41$0
Nov 2025128058.593.93$7,500
Oct 20250059.383.30$0
Sep 202595062.743.08$5,960
Aug 2025101063.933.01$6,457
Jul 2025103066.743.32$6,874
Jun 202564066.483.13$4,255
May 2025117060.553.23$7,084
Apr 20250062.363.54$0
Mar 202592067.704.27$6,228
Feb 2025111070.884.34$7,868
Jan 202533074.324.28$2,453
Dec 20240068.993.12$0
Nov 202482069.052.20$5,662
Oct 20240071.372.28$0
Sep 20240069.612.36$0
Aug 202455075.632.06$4,160
Jul 20240079.932.15$0
Jun 20240078.082.63$0
May 202488078.812.20$6,935
Apr 20240084.451.66$0
Mar 20240080.301.55$0
Feb 202443076.091.78$3,272
Jan 20240073.023.30$0
Dec 202347071.262.61$3,349
Nov 20230077.892.81$0
Oct 202387085.443.09$7,433
Sep 20230089.042.74$0
Aug 20230080.522.67$0
Jul 20230074.852.64$0
Jun 202377068.962.26$5,310
May 202360070.622.23$4,237
Apr 2023103078.122.24$8,046
Mar 20230072.852.39$0
Feb 20230075.112.47$0
Jan 202339076.533.39$2,985
Dec 20220076.415.73$0
Nov 2022126085.005.65$10,710
Oct 20220087.185.86$0
Sep 20220084.888.16$0
Aug 202298094.529.13$9,263
Jul 202200101.587.54$0
Jun 2022840115.097.98$9,668
May 20221120109.378.43$12,249
Apr 202200104.226.84$0
Mar 2022790108.885.08$8,602
Feb 202280091.054.86$7,284
Jan 202290081.844.54$7,366
Dec 2021131071.323.90$9,343
Nov 20210077.435.24$0
Oct 20210079.795.71$0
Sep 2021110069.865.35$7,685
Aug 20210066.024.22$0
Jul 20210070.783.98$0
Jun 20210069.493.38$0
May 202139063.483.02$2,476
Apr 202176060.362.76$4,587
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 202045036.972.48$1,664
Sep 20200037.091.99$0
Aug 202053039.982.39$2,119
Jul 202065038.371.83$2,494
Jun 202078034.901.69$2,722
May 202046016.921.81$778
Apr 20200014.751.80$0
Mar 2020102030.341.86$3,095
Feb 20200049.881.98$0
Jan 20200057.252.09$0
Dec 201955059.012.30$3,246
Nov 20190055.302.75$0
Oct 201972053.472.42$3,850
Sep 20190055.052.66$0
Aug 20190053.112.30$0
Jul 201940056.272.46$2,251
Jun 20190052.782.49$0
May 2019100058.482.74$5,848
Apr 20190062.632.75$0
Mar 20190056.803.06$0
Feb 201951050.852.79$2,593
Jan 201971046.033.23$3,268
Dec 20180046.594.19$0
Nov 201893052.934.24$4,922
Oct 20180061.443.40$0
Sep 20180059.543.11$0
Aug 201876059.403.07$4,514
Jul 20180065.142.93$0
Jun 20180060.183.08$0
May 20180065.382.90$0
Apr 201840063.842.90$2,554
Mar 201862061.222.79$3,796
Feb 20180061.782.77$0
Jan 201864062.874.01$4,024
Dec 20170057.272.92$0
Nov 201738055.423.12$2,106
Oct 201753049.292.98$2,612
Sep 20170047.523.09$0
Aug 201733045.373.00$1,497
Jul 201748043.873.09$2,106
Jun 201760042.493.09$2,549
May 20170045.373.26$0
Apr 201726047.933.21$1,246
Mar 201762046.772.98$2,900
Feb 20170050.452.95$0
Jan 201762049.413.42$3,063
Dec 20160048.763.72$0
Nov 201638042.492.64$1,615
Oct 201647046.193.09$2,171
Sep 201658041.553.10$2,410
Aug 201670041.442.92$2,901
Jul 20160041.622.92$0
Jun 201638045.352.69$1,723
May 201644042.521.99$1,871
Apr 201642036.561.99$1,536
Mar 201646033.011.79$1,518
Feb 201672026.472.06$1,906
Jan 201697027.352.36$2,653
Dec 201541032.362.00$1,327
Nov 20150038.792.17$0
Oct 201542043.552.43$1,829
Sep 201568042.992.76$2,923
Aug 201575040.162.87$3,012
Jul 20150048.152.95$0
Jun 201547056.152.88$2,639
May 201573055.212.96$4,030
Apr 20150049.822.71$0
Mar 201542042.892.93$1,801
Feb 201595044.662.98$4,243
Jan 201537043.433.10$1,607
Dec 20140054.693.59$0
Nov 201460070.464.25$4,228
Oct 201466078.303.90$5,168
Sep 201454086.164.05$4,653
Aug 201498089.394.04$8,760
Jul 201495096.564.18$9,173
Jun 201451098.164.74$5,006
May 20140094.734.73$0
Apr 201461095.944.81$5,852
Mar 20140095.895.06$0
Feb 2014124097.406.19$12,078
Jan 20140090.404.86$0
Dec 201381091.824.35$7,437
Nov 20130088.853.74$0
Oct 201336097.423.78$3,507
Sep 2013370104.113.72$3,852
Aug 2013780104.253.52$8,132
Jul 2013470102.523.72$4,818
Jun 201380094.403.93$7,552
May 201344094.834.15$4,173
Apr 201338093.964.28$3,570
Mar 2013163093.623.91$15,260
Feb 201340091.233.42$3,649
Jan 20130091.603.42$0
Dec 201236086.773.42$3,124
Nov 201257086.953.62$4,956
Oct 201290089.383.40$8,044
Sep 201295094.672.92$8,994
Aug 201241092.662.91$3,799
Jul 201282085.133.02$6,981
Jun 20120079.822.52$0
May 201286091.612.49$7,878
Apr 2012890101.652.00$9,047
Mar 20121030105.052.22$10,820
Feb 20121440101.102.57$14,558
Jan 201255098.092.73$5,395
Dec 20110096.873.24$0
Nov 20110095.723.31$0
Oct 201142084.983.65$3,569
Sep 201145083.623.99$3,763
Aug 201143083.404.15$3,586
Jul 20110094.144.52$0
Jun 2011116092.904.64$10,776
May 201164098.134.40$6,280
Apr 2011450105.964.33$4,768
Mar 2011133096.364.06$12,816
Feb 2011111085.644.18$9,506
Jan 201144086.504.59$3,806
Dec 2010110085.734.35$9,430
Nov 2010194080.843.80$15,683
Oct 20100078.103.51$0
Sep 2010171072.633.98$12,420
Aug 2010114073.684.42$8,400
Jul 201068072.554.74$4,933
Jun 2010226070.364.91$15,901
May 2010103071.124.24$7,325
Apr 2010220081.694.12$17,972
Mar 2010101078.394.39$7,917
Feb 201080073.585.44$5,886
Jan 201090074.365.96$6,692
Dec 2009175071.445.48$12,502
Nov 200967074.593.75$4,998
Oct 2009149072.544.11$10,808
Sep 2009165065.543.06$10,814
Aug 2009123067.423.22$8,293
Jul 2009221061.133.46$13,510
Jun 2009119066.163.90$7,873
May 20090054.743.93$0
Apr 2009249046.773.59$11,646
Mar 200996042.144.06$4,045
Feb 200966032.814.63$2,165
Jan 2009277035.865.37$9,933
Dec 2008129037.105.98$4,786
Nov 2008237055.496.86$13,151
Oct 200872075.246.92$5,417
Sep 20082740101.767.88$27,882
Aug 20081290114.228.48$14,734
Jul 20082330131.0811.39$30,542
Jun 20083060131.3313.03$40,187
May 200800123.1711.57$0
Apr 20081100110.3110.45$12,134
Mar 20081610101.909.66$16,406
Feb 2008388092.538.77$35,902
Jan 20080090.388.21$0
Dec 2007226088.337.30$19,963
Nov 200786091.677.29$7,884
Oct 200791082.856.92$7,539
Sep 2007232075.846.24$17,595
Aug 2007217069.066.39$14,986
Jul 2007373070.906.39$26,446
Jun 2007183062.007.55$11,346
May 2007231058.747.85$13,569
Apr 2007128059.617.81$7,630
Mar 2007130056.927.30$7,400
Feb 2007115055.108.22$6,337
Jan 200750050.306.73$2,515
Dec 2006138056.656.92$7,818
Nov 200647054.207.62$2,547
Oct 200680054.906.01$4,392
Sep 200688060.085.04$5,287
Aug 200650068.717.34$3,436
Jul 2006116069.376.34$8,047
Jun 200656066.286.38$3,712
May 200674066.016.42$4,885
Apr 200653064.397.36$3,413
Mar 2006306056.707.08$17,350
Feb 2006103057.597.75$5,932
Jan 2006115060.598.93$6,968
Dec 20050054.9413.42$0
Nov 2005129054.6910.59$7,055
Oct 20050058.3413.80$0
Sep 200548061.4512.08$2,950
Aug 2005124061.519.80$7,627
Jul 20050055.697.84$0
Jun 200561052.337.38$3,192
May 200596045.226.65$4,341
Apr 2005105049.207.36$5,166
Mar 2005102050.377.15$5,138
Feb 20050045.226.31$0
Jan 2005109043.166.32$4,704
Dec 200468139.866.75$2,717
Nov 20040145.286.33$6
Oct 200455149.706.52$2,740
Sep 200451143.245.28$2,211
Aug 2004111142.375.55$4,709
Jul 200490138.286.08$3,451
Jun 200467136.106.43$2,425
May 200496137.486.49$3,605
Apr 200473134.475.86$2,522
Mar 200454134.365.53$1,861
Feb 200498132.455.51$3,186
Jan 200451132.036.30$1,640
Dec 2003120130.266.30$3,638
Nov 20030128.804.60$5
Oct 2003105128.174.76$2,963
Sep 2003128126.314.75$3,372
Aug 2003127129.765.13$3,785
Jul 2003126129.415.17$3,711
Jun 2003141128.565.98$4,033
May 200363126.595.97$1,681
Apr 2003146126.675.41$3,899
Mar 200355131.146.10$1,719
Feb 200351133.487.93$1,715
Jan 200356130.315.58$1,703
Dec 200247126.914.85$1,270
Nov 20020124.664.14$4
Oct 2002115126.464.23$3,047
Sep 200249127.443.64$1,348
Aug 2002131125.963.16$3,404
Jul 200251124.583.06$1,257
Jun 2002122123.733.34$2,898
May 2002128124.663.58$3,160
Apr 200257123.653.51$1,352
Mar 200249122.003.10$1,081
Feb 2002132118.222.38$2,407
Jan 200259117.172.38$1,015
Dec 200150116.932.36$849
Nov 200147118.072.41$852
Oct 200162119.782.53$1,229
Sep 2001114124.262.25$2,768
Aug 2001125124.873.05$3,112
Jul 2001298123.933.20$7,134
Jun 2001348124.563.82$8,551
May 2001355125.524.31$9,064
Apr 2001353124.685.34$8,717
Mar 2001352124.545.38$8,643
Feb 2001352127.755.77$9,774
Jan 2001372127.478.40$10,227
Dec 2000377126.889.12$10,143
Nov 2000433132.215.66$13,953
Oct 2000508131.235.15$15,870
Sep 2000638131.875.19$20,338
Aug 2000378129.644.54$11,208
Jul 2000246128.534.09$7,022
Jun 2000376129.304.40$11,021
May 2000377127.263.68$10,281
Apr 2000255124.513.12$6,253
Mar 2000380128.422.86$10,802
Feb 2000248127.622.73$6,852
Jan 2000257125.272.48$6,497
Dec 1999245124.282.42$5,951
Nov 1999231123.192.43$5,359
Oct 1999127120.982.80$2,667
Sep 1999110121.752.62$2,395
Aug 1999122119.262.88$2,353
Jul 1999110117.892.37$1,970
Jun 1999122115.942.36$1,947
May 19990115.792.32$2
Apr 19990115.102.21$2
Mar 1999307112.471.84$3,830
Feb 199912819.981.82$1,279
Jan 19990110.381.90$2
Dec 1998019.201.77$2
Nov 19980110.892.19$2
Oct 19980112.421.97$2
Sep 1998130112.592.08$1,639
Aug 19980111.301.91$2
Jul 19980111.742.24$2
Jun 19980011.242.24$0
May 19980012.622.21$0
Apr 19980013.042.51$0
Mar 19980012.802.31$0
Feb 19980013.952.30$0
Jan 19980014.702.15$0
Dec 19970016.322.41$0
Nov 19970018.193.09$0
Oct 19970019.253.15$0
Sep 1997111117.742.95$1,972
Aug 19970117.862.55$3
Jul 1997107117.582.25$1,883
Jun 1997108117.242.26$1,864
May 1997103118.972.31$1,956
Apr 1997114117.882.08$2,040
Mar 1997114118.951.94$2,162
Feb 1997118120.492.21$2,420
Jan 1997116123.483.54$2,727
Dec 1996120123.32$2,798
Nov 1996152121.97$3,339
Oct 19960123.31$0
Sep 1996117122.22$2,600
Aug 1996127120.26$2,573
Jul 1996124119.55$2,424
Jun 1996150118.73$2,810
May 1996178119.43$3,459
Apr 19960121.51$0
Mar 1996128119.38$2,481
Feb 1996121116.98$2,055
Jan 1996123117.07$2,100
Dec 1995126117.19$2,166
Nov 1995127116.00$2,032
Oct 1995201115.43$3,101
Sep 19950116.18$0
Aug 199589115.92$1,417
Jul 1995111115.24$1,692
Jun 1995115116.41$1,887
May 1995125117.56$2,195
Apr 1995126117.73$2,234
Mar 1995123116.44$2,022
Feb 1995114116.58$1,890
Jan 1995174115.92$2,770
Dec 1994162115.03$2,435
Nov 1994127115.90$2,019
Oct 1994185115.58$2,882
Sep 1994183115.29$2,798
Aug 19940116.13$0
Jul 1994125117.56$2,195
Jun 1994124017.09$2,119
May 1994162115.88$2,573
Apr 1994183114.14$2,588
Mar 1994178112.46$2,218
Feb 1994126112.50$1,575
Jan 1994169112.66$2,140
Dec 1993180112.33$2,219
Nov 1993163114.49$2,362
Oct 1993176115.85$2,790
Sep 1993160115.03$2,405
Aug 1993152115.66$2,380
Jul 1993152115.46$2,350
Jun 1993126116.79$2,116
May 1993160117.68$2,829
Apr 1993168118.05$3,032
Mar 1993125118.14$2,268
Feb 1993129117.90$2,309
Jan 1993171116.93$2,895

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                   69 bbl  × $106.41 =     $7,342
Casinghead gas         0 Mcf  × $  3.05 =         $0

────────────────────────────────────────────────────
Month total                                   $7,342

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. 09/O/18802 is the state's own key, not one this site invented.