MAHLER

Operated by UNIT PETROLEUM COMPANY (P-5 877099) 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 5257District 10Field 60462550OilCasinghead gasSave
Value, all time
$19.8 M
Jan 1993 – May 2026
Value, last 12 filed months
$0
at the published price for each month
Months reported
401
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
OilDisposition120,712 bbl$6,956,529
Casinghead gasProduction2,504,865 Mcf$12,854,265
Total$19,810,794

435,476 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 (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 35.8766, -100.5931. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.8 miles.

35.87689, -100.59233 · 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%
6 of 8 wells
With a plug date
37.5%
3 of 8 wells
Median depth
11,075 ft
8 wells filed one
Completion to plug
18.7 years
median over 3 wells

What the state filed about each well

On the RRC proration schedule
675.0%
A plug date is filed
337.5%
BothOn the schedule and plugged. Neither fact cancels the other.
337.5%
NeitherNo plug date, and not on the schedule.
225.0%

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

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

Total depth in feet, 8 of 8 wells. Median 11,075 ft, with the middle half between 10,680 and 11,263 ft; the shallowest is 10,600 ft and the deepest 12,938 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

80s
90s
00s
10s
20s

Last completion by decade, 8 of 8 wells, May 1980 – Sep 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
May 1980 – Sep 2025
8 of 8 wells
Plug dates filed
Mar 2013 – Apr 2026
3 of 8 wells; 5 filed none

Last completion to plug: a median of 18.7 years across the 3 wells that filed both dates, with the middle half between 18.6 years and 25.8 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

8 wells

42-39330694210,600 ftSep 2025
42-393320531010,900 ftMar 2008Yes
42-39331958811,250 ftAug 2007Apr 2026Yes
42-39331947911,250 ftJul 2007Yes
42-39331888711,300 ftJan 2007Yes
42-39330726410,600 ftMar 2006Sep 2024Yes
42-393308565 L10,706 ftOct 1982
42-393307373 U12,938 ftMay 1980Mar 2013Yes

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 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 20250058.593.93$0
Oct 20250059.383.30$0
Sep 20250062.743.08$0
Aug 20250063.933.01$0
Jul 20250066.743.32$0
Jun 20250066.483.13$0
May 20250060.553.23$0
Apr 20250062.363.54$0
Mar 20250067.704.27$0
Feb 20250070.884.34$0
Jan 20250074.324.28$0
Dec 20240068.993.12$0
Nov 20240069.052.20$0
Oct 20240071.372.28$0
Sep 20240069.612.36$0
Aug 20240075.632.06$0
Jul 20240079.932.15$0
Jun 20240078.082.63$0
May 20240078.812.20$0
Apr 20240084.451.66$0
Mar 20240080.301.55$0
Feb 20240076.091.78$0
Jan 20240073.023.30$0
Dec 20230071.262.61$0
Nov 20230077.892.81$0
Oct 20230085.443.09$0
Sep 20230089.042.74$0
Aug 20230080.522.67$0
Jul 20230074.852.64$0
Jun 20230068.962.26$0
May 20230070.622.23$0
Apr 20230078.122.24$0
Mar 20230072.852.39$0
Feb 20230075.112.47$0
Jan 20230076.533.39$0
Dec 20220076.415.73$0
Nov 20220085.005.65$0
Oct 20220087.185.86$0
Sep 20220084.888.16$0
Aug 20220094.529.13$0
Jul 202200101.587.54$0
Jun 202200115.097.98$0
May 202200109.378.43$0
Apr 202200104.226.84$0
Mar 202200108.885.08$0
Feb 20220091.054.86$0
Jan 20220081.844.54$0
Dec 20210071.323.90$0
Nov 20210077.435.24$0
Oct 20210079.795.71$0
Sep 20210069.865.35$0
Aug 20210066.024.22$0
Jul 20210070.783.98$0
Jun 20210069.493.38$0
May 20210063.483.02$0
Apr 20210060.362.76$0
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 20200036.972.48$0
Sep 20200037.091.99$0
Aug 20200039.982.39$0
Jul 20200038.371.83$0
Jun 20200034.901.69$0
May 20200016.921.81$0
Apr 20200014.751.80$0
Mar 20200030.341.86$0
Feb 20200049.881.98$0
Jan 20200057.252.09$0
Dec 20190059.012.30$0
Nov 20190055.302.75$0
Oct 20190053.472.42$0
Sep 20190055.052.66$0
Aug 20190053.112.30$0
Jul 20190056.272.46$0
Jun 20190052.782.49$0
May 20190058.482.74$0
Apr 20190062.632.75$0
Mar 20190056.803.06$0
Feb 20190050.852.79$0
Jan 20190046.033.23$0
Dec 20180046.594.19$0
Nov 20180052.934.24$0
Oct 20180061.443.40$0
Sep 20180059.543.11$0
Aug 20180059.403.07$0
Jul 20180065.142.93$0
Jun 20180060.183.08$0
May 20180065.382.90$0
Apr 20180063.842.90$0
Mar 20180061.222.79$0
Feb 20180061.782.77$0
Jan 20180062.874.01$0
Dec 20170057.272.92$0
Nov 20170055.423.12$0
Oct 20170049.292.98$0
Sep 20170047.523.09$0
Aug 20170045.373.00$0
Jul 20170043.873.09$0
Jun 20170042.493.09$0
May 20170045.373.26$0
Apr 201798047.933.21$4,697
Mar 20170046.772.98$0
Feb 20170050.452.95$0
Jan 20170049.413.42$0
Dec 20160048.763.72$0
Nov 20160042.492.64$0
Oct 20160046.193.09$0
Sep 20160041.553.10$0
Aug 20160041.442.92$0
Jul 20160041.622.92$0
Jun 20160045.352.69$0
May 20160042.521.99$0
Apr 20160036.561.99$0
Mar 20160033.011.79$0
Feb 20160026.472.06$0
Jan 20160027.352.36$0
Dec 20150032.362.00$0
Nov 20150038.792.17$0
Oct 20150043.552.43$0
Sep 20150042.992.76$0
Aug 20150040.162.87$0
Jul 20150048.152.95$0
Jun 20150056.152.88$0
May 20150055.212.96$0
Apr 20150049.822.71$0
Mar 20150042.892.93$0
Feb 20150044.662.98$0
Jan 20150043.433.10$0
Dec 20140054.693.59$0
Nov 20140070.464.25$0
Oct 20140078.303.90$0
Sep 20140086.164.05$0
Aug 20140089.394.04$0
Jul 20140096.564.18$0
Jun 20140098.164.74$0
May 20140094.734.73$0
Apr 20140095.944.81$0
Mar 20140095.895.06$0
Feb 20140097.406.19$0
Jan 20140090.404.86$0
Dec 20130091.824.35$0
Nov 20130088.853.74$0
Oct 20130097.423.78$0
Sep 201300104.113.72$0
Aug 201300104.253.52$0
Jul 201300102.523.72$0
Jun 20130094.403.93$0
May 20130094.834.15$0
Apr 20130093.964.28$0
Mar 20130093.623.91$0
Feb 20130091.233.42$0
Jan 20130091.603.42$0
Dec 20120086.773.42$0
Nov 20120086.953.62$0
Oct 20120089.383.40$0
Sep 20120094.672.92$0
Aug 20120092.662.91$0
Jul 20120085.133.02$0
Jun 20120079.822.52$0
May 2012022591.612.49$560
Apr 2012086101.652.00$172
Mar 201201,674105.052.22$3,720
Feb 201205101.102.57$13
Jan 201235258698.092.73$36,130
Dec 201102,69796.873.24$8,738
Nov 2011089595.723.31$2,964
Oct 20110084.983.65$0
Sep 20111901,12683.623.99$20,376
Aug 201101,66583.404.15$6,909
Jul 20113441,69194.144.52$40,023
Jun 20111741,83492.904.64$24,674
May 201102,21498.134.40$9,752
Apr 2011611,337105.964.33$12,257
Mar 201101,53196.364.06$6,212
Feb 20113461,68985.644.18$36,691
Jan 201101,85986.504.59$8,531
Dec 201001,80785.734.35$7,856
Nov 201001,81280.843.80$6,877
Oct 20103431,82178.103.51$33,178
Sep 20101702,69372.633.98$23,064
Aug 20101773,11873.684.42$26,821
Jul 20101663,14072.554.74$26,916
Jun 20102703,12670.364.91$34,347
May 20106922,97271.124.24$61,802
Apr 201051016,31381.694.12$108,915
Mar 20101,22024,33778.394.39$202,443
Feb 20101,06223,98273.585.44$208,661
Jan 20101,23427,54674.365.96$256,047
Dec 20091,76926,40171.445.48$271,154
Nov 20091,04823,52974.593.75$166,439
Oct 20091,06925,77172.544.11$183,471
Sep 20091,04825,54265.543.06$146,966
Aug 20091,02726,28067.423.22$153,823
Jul 20091,21127,37661.133.46$168,873
Jun 20091,21227,01966.163.90$185,425
May 20091,22328,16454.743.93$177,512
Apr 20091,00827,06446.773.59$144,236
Mar 20091,45228,21542.144.06$175,712
Feb 20091,59928,61232.814.63$185,023
Jan 20092,00430,56135.865.37$236,007
Dec 200836832,77337.105.98$209,542
Nov 20081,40936,88955.496.86$331,257
Oct 20081,27140,09475.246.92$373,160
Sep 20081,90440,417101.767.88$512,119
Aug 20082,10546,171114.228.48$632,103
Jul 20081,58951,613131.0811.39$796,129
Jun 20082,64551,183131.3313.03$1,014,417
May 20082,60863,847123.1711.57$1,060,211
Apr 20084,04665,359110.3110.45$1,129,633
Mar 20083,21540,826101.909.66$722,154
Feb 200891126,63792.538.77$317,917
Jan 20081,48631,10590.388.21$389,544
Dec 20071,48648,77888.337.30$487,434
Nov 20072,21351,76991.677.29$580,350
Oct 20072,39764,45582.856.92$644,748
Sep 20072,26054,35575.846.24$510,800
Aug 20072,67446,24669.066.39$480,083
Jul 20073,52234,19670.906.39$468,152
Jun 20072,22118,65862.007.55$278,541
May 20072,71615,11858.747.85$278,158
Apr 20072,46713,64659.617.81$253,568
Mar 20072,2828,57056.927.30$192,469
Feb 20073,54213,97255.108.22$309,958
Jan 20071923,52550.306.73$33,370
Dec 20061934,37156.656.92$41,174
Nov 200603,38754.207.62$25,800
Oct 200603,60954.906.01$21,704
Sep 20063864,74360.085.04$47,082
Aug 20061896,05768.717.34$57,444
Jul 200604,76669.376.34$30,230
Jun 20061905,74766.286.38$49,281
May 20065715,49266.016.42$72,978
Apr 20061895,26864.397.36$50,945
Mar 200605,92156.707.08$41,938
Feb 200603,89357.597.75$30,175
Jan 20061946,76960.598.93$72,224
Dec 20051945,90754.9413.42$89,903
Nov 20053825,41054.6910.59$78,175
Oct 200506,92358.3413.80$95,508
Sep 20051887,00461.4512.08$96,154
Aug 20051926,40961.519.80$74,598
Jul 20051905,51355.697.84$53,823
Jun 200505,52252.337.38$40,758
May 20051924,75645.226.65$40,315
Apr 20051805,39449.207.36$48,558
Mar 20051975,55350.377.15$49,654
Feb 20051494,61945.226.31$35,893
Jan 20051935,71043.166.32$44,430
Dec 20041915,10739.866.75$42,091
Nov 20041935,53045.286.33$43,746
Oct 20041896,44849.706.52$51,403
Sep 20041175,74943.245.28$35,436
Aug 20045506,91342.375.55$61,675
Jul 20043465,52438.286.08$46,854
Jun 20041775,91736.106.43$44,454
May 20041897,28637.486.49$54,403
Apr 20041768,52134.475.86$55,987
Mar 20041909,09634.365.53$56,831
Feb 20041938,48932.455.51$53,034
Jan 20041837,66432.036.30$54,142
Dec 20031826,79430.266.30$48,321
Nov 20033736,42928.804.60$40,285
Oct 20033726,58828.174.76$41,836
Sep 20031847,46326.314.75$40,286
Aug 200301,34929.765.13$6,920
Jul 2003032629.415.17$1,686
Jun 20031943,10328.565.98$24,106
May 20031875,37026.595.97$37,046
Apr 20031915,13026.675.41$32,833
Mar 20031886,24631.146.10$43,930
Feb 20031915,22733.487.93$47,823
Jan 20032846,14330.315.58$42,899
Dec 20021925,75726.914.85$33,110
Nov 20021805,47424.664.14$27,085
Oct 20021945,08926.464.23$26,655
Sep 20021917,20627.443.64$31,436
Aug 20021746,19725.963.16$24,125
Jul 20021927,20524.583.06$26,779
Jun 20021936,32923.733.34$25,708
May 200207,18224.663.58$25,740
Apr 20025356,32723.653.51$34,875
Mar 20021826,47322.003.10$24,088
Feb 20023596,36918.222.38$21,672
Jan 20021876,22217.172.38$17,992
Dec 20011885,38316.932.36$15,910
Nov 20011857,67418.072.41$21,803
Oct 20011856,87519.782.53$21,045
Sep 20011847,35424.262.25$21,020
Aug 20011836,81824.873.05$25,368
Jul 20011826,55823.933.20$25,322
Jun 20013637,81724.563.82$38,809
May 20011836,74325.524.31$33,714
Apr 20015366,44324.685.34$47,604
Mar 20011846,59324.545.38$39,962
Feb 20013596,39127.755.77$46,820
Jan 20011867,17427.478.40$65,362
Dec 20001775,61626.889.12$55,990
Nov 20001845,41732.215.66$36,576
Oct 20001705,44231.235.15$33,311
Sep 20003456,77131.875.19$46,113
Aug 200005,70329.644.54$25,896
Jul 20001825,42128.534.09$27,363
Jun 20001725,30329.304.40$28,358
May 20001826,42627.263.68$28,607
Apr 20001775,40824.513.12$21,190
Mar 20003636,20428.422.86$28,058
Feb 200006,68227.622.73$18,218
Jan 20003485,42525.272.48$22,251
Dec 19991845,07324.282.42$16,763
Nov 19991835,49523.192.43$17,619
Oct 199906,14820.982.80$17,237
Sep 19991866,83421.752.62$21,943
Aug 19995486,17219.262.88$28,303
Jul 19993615,48717.892.37$19,475
Jun 19991885,26015.942.36$15,421
May 199905,10415.792.32$11,846
Apr 19991755,24815.102.21$14,230
Mar 19993625,68712.471.84$14,969
Feb 19991765,3299.981.82$11,443
Jan 19991815,03510.381.90$11,445
Dec 19981833,8189.201.77$8,454
Nov 19981844,01710.892.19$10,784
Oct 199804,29212.421.97$8,452
Sep 19981782,36212.592.08$7,160
Aug 19983364,61411.301.91$12,597
Jul 19981775,37211.742.24$14,097
Jun 19985344,74911.242.24$16,627
May 19981825,30312.622.21$13,997
Apr 19983655,26813.042.51$17,958
Mar 199804,16112.802.31$9,610
Feb 19981844,46413.952.30$12,830
Jan 19987155,02214.702.15$21,332
Dec 19971775,53716.322.41$16,239
Nov 199704,36418.193.09$13,477
Oct 19971815,46119.253.15$20,685
Sep 19971745,90817.742.95$20,544
Aug 19971836,04317.862.55$18,707
Jul 19973535,88717.582.25$19,433
Jun 19973747,22317.242.26$22,752
May 19978839,31818.972.31$38,261
Apr 199736410,67217.882.08$28,736
Mar 199737110,30518.951.94$27,013
Feb 199755110,57320.492.21$34,613
Jan 199754510,64123.483.54$50,463
Dec 199670311,61423.32$16,394
Nov 19963599,42621.97$7,887
Oct 199637711,48123.31$8,788
Sep 199637710,83622.22$8,377
Aug 19963779,05320.26$7,638
Jul 1996010,45219.55$0
Jun 19963634,87918.73$6,799
May 19961945,66819.43$3,769
Apr 19963255,71821.51$6,991
Mar 19961846,27419.38$3,566
Feb 19965637,56516.98$9,560
Jan 19961737,74717.07$2,953
Dec 19952029,08717.19$3,472
Nov 19953618,42216.00$5,776
Oct 19951815,73315.43$2,793
Sep 19958868,37216.18$14,335
Aug 19951787,71115.92$2,834
Jul 19955337,93015.24$8,123
Jun 1995477,34216.41$771
May 19951757,03917.56$3,073
Apr 19957578,57217.73$13,422
Mar 19954849,25016.44$7,957
Feb 19951777,37316.58$2,935
Jan 19957206,38415.92$11,462
Dec 19941748,90515.03$2,615
Nov 199435511,09715.90$5,645
Oct 199435711,97215.58$5,562
Sep 199435211,47515.29$5,382
Aug 199417510,29616.13$2,823
Jul 19941,1637,77817.56$20,422
Jun 199408,91417.09$0
May 19941809,09615.88$2,858
Apr 19943529,26514.14$4,977
Mar 199488410,96112.46$11,015
Feb 19941769,26312.50$2,200
Jan 1994010,54012.66$0
Dec 1993010,77712.33$0
Nov 19937249,51314.49$10,491
Oct 199335410,61315.85$5,611
Sep 199354610,29715.03$8,206
Aug 199353210,46115.66$8,331
Jul 199371111,14415.46$10,992
Jun 19931779,07116.79$2,972
May 19931,08010,19717.68$19,094
Apr 199391010,72218.05$16,426
Mar 199336710,54818.14$6,657
Feb 19939258,56817.90$16,558
Jan 199337010,07516.93$6,264

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.

Apr 2017 — as filed, then multipliedworked
Oil                   98 bbl  × $ 47.93 =     $4,697
Casinghead gas         0 Mcf  × $  3.21 =         $0

────────────────────────────────────────────────────
Month total                                   $4,697

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/5257 is the state's own key, not one this site invented.