MAHLER, FIELDS

Operated by MMGL TXPH, LLC (P-5 101619) in the MENDOTA, NW. (GRANITE WASH, SW.) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 5811District 10Field 60462550NGPA filingOilCasinghead gasSaveExport
Value, all time
$28.3 M
Jan 1993 – May 2026
Value, last 12 filed months
$187 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 93 leases and 143 wells, and the rule below applies to all of them.

Discovered
1976-04-01
as the register files it
Field class
Oil and gas
the register's own label
Between wells
1,200 ft
minimum
From a lease line
467 ft
minimum

A drilling unit in this field needs at least 80 acres. The field rule took effect on 1984-02-27.

The Commission's schedule remark for this field reads: WASH) FIELD EFFECTIVE 12/05/17.

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
NGPA1none

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
OilDisposition176,671 bbl$11,029,522
Casinghead gasProduction3,129,174 Mcf$17,250,006
Total$28,279,528

181,229 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 (9)

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 35.8778, -100.6099. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.8 miles.

35.87805, -100.60944 · 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
11.1%
1 of 9 wells
With a plug date
11.1%
1 of 9 wells
Median depth
10,600 ft
9 wells filed one
Completion to plug
31.4 years
median over 1 well

What the state filed about each well

On the RRC proration schedule
111.1%
A plug date is filed
111.1%
BothOn the schedule and plugged. Neither fact cancels the other.
111.1%
NeitherNo plug date, and not on the schedule.
888.9%

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, 9 of 9 wells. Median 10,600 ft, with the middle half between 10,550 and 10,600 ft; the shallowest is 10,302 ft and the deepest 10,610 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, 9 of 9 wells, Feb 1978 – Jan 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 – Jan 2006
9 of 9 wells
Plug dates filed
Jan 2016
1 of 9 wells; 8 filed none

Last completion to plug: a median of 31.4 years across the 1 well that filed both dates, with the middle half between 31.4 years and 31.4 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

9 wells

42-39331740139810,600 ftJan 2006
42-39331739129810,600 ftDec 2005
42-39331738119810,610 ftNov 2005
42-393317171010,600 ftOct 2005
42-39331703909810,600 ftAug 2005
42-39331175809810,302 ftOct 1992
42-39331024709810,550 ftAug 1984Jan 2016Yes
42-39331019609810,608 ftJul 1984
42-39330260309810,400 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 20261752,221106.413.05$25,387
Apr 202642,44498.932.87$7,409
Mar 202602,51189.753.15$7,908
Feb 20261712,28063.503.75$19,409
Jan 20263512,49159.138.00$40,677
Dec 202542,46956.664.41$11,123
Nov 202502,44158.593.93$9,584
Oct 202502,54959.383.30$8,424
Sep 20252182,45662.743.08$21,234
Aug 20251812,51463.933.01$19,150
Jul 202502,63466.743.32$8,732
Jun 202502,42466.483.13$7,584
May 20251782,54760.553.23$19,011
Apr 20251652,61862.363.54$19,565
Mar 20251592,56267.704.27$21,700
Feb 202502,09770.884.34$9,103
Jan 202502,29674.324.28$9,824
Dec 20241672,80568.993.12$20,277
Nov 202402,65469.052.20$5,835
Oct 20241722,56271.372.28$18,121
Sep 20241602,49569.612.36$17,037
Aug 20241802,56775.632.06$18,911
Jul 202402,59379.932.15$5,566
Jun 202402,50178.082.63$6,588
May 20241582,61378.812.20$18,197
Apr 20241742,60384.451.66$19,013
Mar 20241502,79380.301.55$16,361
Feb 202442,33776.091.78$4,473
Jan 20241772,91173.023.30$22,524
Dec 202303,17271.262.61$8,281
Nov 202302,05677.892.81$5,772
Oct 20232832,45085.443.09$31,743
Sep 202302,58289.042.74$7,062
Aug 2023102,65480.522.67$7,899
Jul 20232442,78474.852.64$25,618
Jun 20232042,68068.962.26$20,121
May 202308,45570.622.23$18,833
Apr 2023412,66678.122.24$9,169
Mar 202302,72472.852.39$6,519
Feb 20231802,38575.112.47$19,400
Jan 2023112,32276.533.39$8,708
Dec 20221312,27276.415.73$23,026
Nov 20221852,62385.005.65$30,535
Oct 2022122,67187.185.86$16,708
Sep 20221842,47784.888.16$35,839
Aug 202202,54094.529.13$23,183
Jul 20223292,454101.587.54$51,928
Jun 20221582,724115.097.98$39,914
May 2022152,978109.378.43$26,754
Apr 20221772,927104.226.84$38,461
Mar 20223503,093108.885.08$53,809
Feb 202202,82191.054.86$13,707
Jan 20221793,62281.844.54$31,085
Dec 20211742,55671.323.90$22,376
Nov 202102,46977.435.24$12,930
Oct 20211732,59179.795.71$28,608
Sep 20211732,49769.865.35$25,447
Aug 20211852,73466.024.22$23,753
Jul 20211722,87270.783.98$23,611
Jun 202102,97869.493.38$10,067
May 202143,05463.483.02$9,470
Apr 20215203,19560.362.76$40,200
Mar 202103,27261.302.72$8,890
Feb 202141,67257.805.55$9,507
Jan 202163,25950.412.81$9,461
Dec 20205223,38844.642.68$32,367
Nov 202054,17638.772.71$11,496
Oct 20203384,33736.972.48$23,245
Sep 20201744,30837.091.99$15,031
Aug 20201704,47039.982.39$17,458
Jul 20201814,54838.371.83$15,246
Jun 202044,36134.901.69$7,511
May 20205294,28016.921.81$16,718
Apr 20201824,27314.751.80$10,395
Mar 202084,83730.341.86$9,221
Feb 20203514,64049.881.98$26,698
Jan 20201765,02257.252.09$20,596
Dec 20197034,95759.012.30$52,907
Nov 201904,80055.302.75$13,203
Oct 201904,74253.472.42$11,469
Sep 20191714,79655.052.66$22,158
Aug 20193454,56653.112.30$28,845
Jul 20195154,95056.272.46$41,156
Jun 20191774,88052.782.49$21,499
May 20191824,95658.482.74$24,224
Apr 20191744,97662.632.75$24,585
Mar 20191844,80756.803.06$25,171
Feb 20193654,39950.852.79$30,843
Jan 20191845,11246.033.23$24,972
Dec 20181835,21946.594.19$30,370
Nov 201805,10152.934.24$21,614
Oct 20185405,42261.443.40$51,602
Sep 20183655,41859.543.11$38,571
Aug 20181845,66859.403.07$28,311
Jul 20183535,65165.142.93$39,562
Jun 20181845,26360.183.08$27,267
May 20185275,57965.382.90$50,639
Apr 20181875,50163.842.90$27,895
Mar 20183765,86261.222.79$39,355
Feb 20181825,10361.782.77$25,359
Jan 20185455,79862.874.01$57,510
Dec 20173565,95457.272.92$37,783
Nov 201706,07855.423.12$18,953
Oct 20173666,06349.292.98$36,130
Sep 20175396,00947.523.09$44,165
Aug 20173626,36745.373.00$35,553
Jul 201706,36343.873.09$19,644
Jun 20173626,32142.493.09$34,896
May 20175466,91945.373.26$47,351
Apr 20178996,62147.933.21$64,353
Mar 20173604,74346.772.98$30,989
Feb 20175054,39650.452.95$38,457
Jan 20173614,87649.413.42$34,507
Dec 201604,71048.763.72$17,535
Nov 20163634,63342.492.64$27,675
Oct 201604,88746.193.09$15,102
Sep 20163554,71541.553.10$29,370
Aug 20168164,72741.442.92$47,638
Jul 201634,97741.622.92$14,679
Jun 20164634,73445.352.69$33,712
May 20162484,77642.521.99$20,054
Apr 20161814,94736.561.99$16,467
Mar 20164134,77233.011.79$22,194
Feb 201604,72526.472.06$9,751
Jan 20165195,19127.352.36$26,468
Dec 20154514,51932.362.00$23,639
Nov 2015144,74338.792.17$10,823
Oct 20155894,73243.552.43$37,134
Sep 201504,66442.992.76$12,865
Aug 20155324,85940.162.87$35,323
Jul 20151805,37348.152.95$24,491
Jun 20157215,40256.152.88$56,057
May 20151735,33455.212.96$25,316
Apr 20151755,44849.822.71$23,464
Mar 20157245,71142.892.93$47,812
Feb 201505,03944.662.98$14,997
Jan 20151805,58843.433.10$25,144
Dec 20147053054.693.59$38,664
Nov 20141845,44070.464.25$36,095
Oct 20141885,96278.303.90$37,978
Sep 20145905,91486.164.05$74,759
Aug 20141845,29089.394.04$37,794
Jul 20141854,67596.564.18$37,403
Jun 20141875,84198.164.74$46,024
May 20145427,09694.734.73$84,883
Apr 20145417,84195.944.81$89,612
Mar 20145397,08895.895.06$87,527
Feb 201404,67497.406.19$28,941
Jan 20143665,42290.404.86$59,441
Dec 20131895,24891.824.35$40,206
Nov 20133605,37288.853.74$52,068
Oct 201305,71397.423.78$21,591
Sep 20138405,772104.113.72$108,911
Aug 20137046,052104.253.52$94,711
Jul 20137146,136102.523.72$96,011
Jun 201305,92594.403.93$23,305
May 20137366,07794.834.15$95,009
Apr 20131915,88693.964.28$43,154
Mar 20135666,19393.623.91$77,221
Feb 201305,15091.233.42$17,613
Jan 20133676,13391.603.42$54,592
Dec 20127506,14186.773.42$86,081
Nov 20125506,00986.953.62$69,605
Oct 20121837,67489.383.40$42,446
Sep 20125327,54194.672.92$72,372
Aug 201207,84592.662.91$22,815
Jul 20127357,97285.133.02$86,652
Jun 20127288,05979.822.52$78,410
May 20123548,91191.612.49$54,603
Apr 201255412,698101.652.00$81,669
Mar 201208105.052.22$18
Feb 20121,0847,772101.102.57$129,568
Jan 20123639,50798.092.73$61,600
Dec 20111829,99796.873.24$50,018
Nov 201107,86395.723.31$26,037
Oct 20111,9849,46684.983.65$203,137
Sep 201109,47383.623.99$37,757
Aug 20111,2949,04083.404.15$145,429
Jul 20111839,77094.144.52$61,361
Jun 20111969,57592.904.64$62,635
May 201157210,64098.134.40$102,998
Apr 201156510,397105.964.33$104,921
Mar 201139411,12996.364.06$83,120
Feb 201141710,01485.644.18$77,570
Jan 2011011,94686.504.59$54,818
Dec 201038512,63485.734.35$87,936
Nov 201019711,23080.843.80$58,547
Oct 201056813,15578.103.51$90,520
Sep 201056712,56072.633.98$91,163
Aug 201076516,19073.684.42$127,915
Jul 201058417,12072.554.74$123,458
Jun 20101,16016,12770.364.91$160,808
May 201097216,71871.124.24$139,933
Apr 201058216,80681.694.12$116,830
Mar 2010016,95178.394.39$74,392
Feb 2010015,51773.585.44$84,449
Jan 201038917,01074.365.96$130,375
Dec 200939518,03171.445.48$127,096
Nov 200958717,90574.593.75$110,955
Oct 200993418,56872.544.11$144,071
Sep 20091,02918,17665.543.06$123,146
Aug 200994918,69967.423.22$124,164
Jul 200996618,60061.133.46$123,491
Jun 200938518,21166.163.90$96,403
May 20091,38219,92454.743.93$153,867
Apr 200938519,83246.773.59$89,154
Mar 20091,14019,76142.144.06$128,250
Feb 200995918,68432.814.63$118,028
Jan 200977520,90235.865.37$140,056
Dec 20081,36521,47937.105.98$179,024
Nov 200897422,10255.496.86$205,675
Oct 200857222,19675.246.92$196,678
Sep 200876321,940101.767.88$250,466
Aug 20081,68122,781114.228.48$385,256
Jul 20081,54122,844131.0811.39$462,174
Jun 20082,27322,400131.3313.03$590,444
May 20081,29124,370123.1711.57$441,078
Apr 20081,51420,874110.3110.45$385,244
Mar 200855724,591101.909.66$294,407
Feb 200874421,96992.538.77$261,523
Jan 20081,87024,03590.388.21$366,235
Dec 200754624,51588.337.30$227,236
Nov 200795025,21691.677.29$270,954
Oct 20071,10227,62082.856.92$282,486
Sep 200794127,88775.846.24$245,496
Aug 20071,29829,08669.066.39$275,440
Jul 20072,00929,31870.906.39$329,720
Jun 20071,47029,72862.007.55$315,540
May 20071,11831,57458.747.85$313,410
Apr 20071,30532,43659.617.81$330,961
Mar 20072,27435,09156.927.30$385,670
Feb 200772926,91055.108.22$261,260
Jan 20071,85331,55250.306.73$305,451
Dec 20061,46234,23256.656.92$319,654
Nov 200673734,17254.207.62$300,250
Oct 20062,24338,55654.906.01$355,009
Sep 20062,03340,14360.085.04$324,351
Aug 20062,02440,70568.717.34$437,840
Jul 20062,79146,92469.376.34$491,239
Jun 20062,76047,95466.286.38$489,065
May 20064,10751,16366.016.42$599,825
Apr 20064,43548,51464.397.36$642,656
Mar 20064,15144,88956.707.08$553,307
Feb 20064,21951,21357.597.75$639,930
Jan 20068,55668,26960.598.93$1,128,277
Dec 20055,18362,23454.9413.42$1,119,648
Nov 20053,73344,16054.6910.59$671,742
Oct 20055,50249,24558.3413.80$1,000,359
Sep 20052,71333,76561.4512.08$574,561
Aug 20052,0349,29261.519.80$216,144
Jul 200518298255.697.84$17,838
Jun 200501,50152.337.38$11,079
May 20051821,40045.226.65$17,542
Apr 200502,02249.207.36$14,883
Mar 200503,22650.377.15$23,082
Feb 20051823,01745.226.31$27,273
Jan 200503,34543.166.32$21,148
Dec 20043593,70339.866.75$39,309
Nov 20041872,71145.286.33$25,629
Oct 20041963,56149.706.52$32,941
Sep 200403,41643.245.28$18,050
Aug 20041853,34342.375.55$26,394
Jul 20041943,26138.286.08$27,267
Jun 200417114,67436.106.43$100,571
May 20041963,36637.486.49$29,207
Apr 200403,23834.475.86$18,970
Mar 200402,13134.365.53$11,785
Feb 20044002,04132.455.51$24,225
Jan 200402,33232.036.30$14,691
Dec 200302,47230.266.30$15,578
Nov 20032092,38028.804.60$16,956
Oct 200302,39928.174.76$11,418
Sep 200302,32726.314.75$11,052
Aug 20035442,40129.765.13$28,506
Jul 200302,39729.415.17$12,395
Jun 200302,33528.565.98$13,970
May 200302,44626.595.97$14,609
Apr 20031872,34526.675.41$17,667
Mar 200302,47731.146.10$15,100
Feb 200301,98433.487.93$15,725
Jan 20034102,42930.315.58$25,986
Dec 200202,40826.914.85$11,688
Nov 20021852,41224.664.14$14,540
Oct 200202,53126.464.23$10,704
Sep 200202,42327.443.64$8,808
Aug 20021872,39125.963.16$12,420
Jul 200202,42924.583.06$7,437
Jun 20023632,40623.733.34$16,646
May 200202,53024.663.58$9,068
Apr 200202,42123.653.51$8,503
Mar 20021892,44922.003.10$11,757
Feb 200202,21418.222.38$5,260
Jan 20021892,51717.172.38$9,225
Dec 20011812,50416.932.36$8,985
Nov 200102,34118.072.41$5,631
Oct 20011852,44619.782.53$9,845
Sep 20011802,38424.262.25$9,734
Aug 200102,39324.873.05$7,306
Jul 200102,46223.933.20$7,871
Jun 200102,42824.563.82$9,285
May 20011952,47025.524.31$15,615
Apr 20011952,40524.685.34$17,644
Mar 20011852,55624.545.38$18,282
Feb 200102,93627.755.77$16,932
Jan 200103,89627.478.40$32,722
Dec 200003,84226.889.12$35,049
Nov 20003813,26432.215.66$30,740
Oct 20001983,40631.235.15$23,709
Sep 200002,64931.875.19$13,739
Aug 20001982,44829.644.54$16,984
Jul 200002,59128.534.09$10,597
Jun 200002,49429.304.40$10,967
May 20001842,43427.263.68$13,972
Apr 200002,41924.513.12$7,538
Mar 20001882,54528.422.86$12,621
Feb 20001792,10927.622.73$10,694
Jan 20001862,49825.272.48$10,897
Dec 19991852,43024.282.42$10,381
Nov 199902,51023.192.43$6,109
Oct 199902,51820.982.80$7,060
Sep 19993632,38421.752.62$14,139
Aug 199902,59419.262.88$7,459
Jul 199902,73117.892.37$6,479
Jun 19991503,36515.942.36$10,339
May 19993923,20815.792.32$13,636
Apr 199901,65015.102.21$3,643
Mar 199903,28412.471.84$6,037
Feb 1999752,7499.981.82$5,746
Jan 19991972,93610.381.90$7,623
Dec 19981912,7469.201.77$6,627
Nov 19982303,03810.892.19$9,145
Oct 19981973,44612.421.97$9,233
Sep 199802,95712.592.08$6,158
Aug 19981852,84811.301.91$7,523
Jul 199803,09011.742.24$6,913
Jun 199802,45011.242.24$5,481
May 19981983,21112.622.21$9,583
Apr 19981592,01613.042.51$7,124
Mar 19981902,71212.802.31$8,695
Feb 199802,50713.952.30$5,764
Jan 199802,60214.702.15$5,607
Dec 19972732,37716.322.41$10,187
Nov 19971903,16018.193.09$13,215
Oct 1997822,80519.253.15$10,414
Sep 199702,98117.742.95$8,809
Aug 19972832,90117.862.55$12,466
Jul 199702,43717.582.25$5,476
Jun 199702,60117.242.26$5,871
May 19971882,65818.972.31$9,702
Apr 19971832,57017.882.08$8,625
Mar 19972972,58918.951.94$10,649
Feb 199702,90720.492.21$6,413
Jan 19972053,28123.483.54$16,427
Dec 19961133,41923.32$2,635
Nov 19962973,11721.97$6,525
Oct 199604,05823.31$0
Sep 19961923,40422.22$4,266
Aug 1996583,08020.26$1,175
Jul 19962314,11119.55$4,516
Jun 19961892,61618.73$3,540
May 199602,60919.43$0
Apr 19964093,55021.51$8,798
Mar 199604,42619.38$0
Feb 199603,12716.98$0
Jan 19965063,83017.07$8,637
Dec 199504,00117.19$0
Nov 199504,38516.00$0
Oct 1995574,45615.43$880
Sep 19954554,13916.18$7,362
Aug 199503,51515.92$0
Jul 19952994,00515.24$4,557
Jun 19953393,98916.41$5,563
May 19951903,43517.56$3,336
Apr 199503,57717.73$0
Mar 19956814,45316.44$11,196
Feb 199503,63516.58$0
Jan 19952984,30415.92$4,744
Dec 19943803,88715.03$5,711
Nov 19941453,96715.90$2,306
Oct 19943814,15315.58$5,936
Sep 199403,88615.29$0
Aug 19946363,69916.13$10,259
Jul 199403,29017.56$0
Jun 19942924,16917.09$4,990
May 19941902,75415.88$3,017
Apr 19941903,48714.14$2,687
Mar 19941873,70412.46$2,330
Feb 19942833,34012.50$3,538
Jan 19942894,17012.66$3,659
Dec 19931922,44912.33$2,367
Nov 19931893,94414.49$2,739
Oct 19933814,31715.85$6,039
Sep 19931893,90415.03$2,841
Aug 19933034,10215.66$4,745
Jul 19933004,26515.46$4,638
Jun 19931754,10916.79$2,938
May 19936174,36517.68$10,909
Apr 199304,13718.05$0
Mar 19935544,01718.14$10,050
Feb 19932873,84817.90$5,137
Jan 19932024,02516.93$3,420

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                  175 bbl  × $106.41 =    $18,622
Casinghead gas     2,221 Mcf  × $  3.05 =     $6,765

────────────────────────────────────────────────────
Month total                                  $25,387

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. 10/O/5811 is the state's own key, not one this site invented.