HALFF & OPPENHEIMER -C-

Operated by MAVERICK ENERGY GROUP, INC. (P-5 534219) in the PEARSALL (AUSTIN CHALK) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 4586District 01Field 69981125OilCasinghead gasSaveExport
Value, all time
$2.1 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

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 1,992 leases and 3,388 wells, and the rule below applies to all of them.

Discovered
1936-12-28
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 2025-06-17.

The Commission's schedule remark for this field reads: LEASE PLAT. PRORATION PLAT IS NOT REQUIRED.

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
OilDisposition27,072 bbl$1,076,133
Casinghead gasProduction236,457 Mcf$1,064,219
Total$2,140,352

26,802 Mcf of this lease's gas, across 23 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 (4)

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 28.8419, -99.1884. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.6 miles.

28.84224, -99.18787 · 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
100.0%
4 of 4 wells
With a plug date
100.0%
4 of 4 wells
Median depth
5,923 ft
4 wells filed one
Completion to plug
32.8 years
median over 4 wells

What the state filed about each well

On the RRC proration schedule
4100.0%
A plug date is filed
4100.0%
BothOn the schedule and plugged. Neither fact cancels the other.
4100.0%
NeitherNo plug date, and not on the schedule.
00.0%

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

Between 5,725 and 6,005 ft, median 5,923 ft, over the 4 wells that filed a depth.

Completions filed
Oct 1974 – Jun 1976
4 of 4 wells
Plug dates filed
Mar 1994 – Aug 2022
4 of 4 wells

Last completion to plug: a median of 32.8 years across the 4 wells that filed both dates, with the middle half between 18.8 years and 46.8 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

4 wells

42-1633038645,725 ftJun 1976Mar 1994Yes
42-1633018035,950 ftMar 1976Aug 2022Yes
42-1633013426,005 ftJun 1975Jul 1994Yes
42-1633009415,895 ftOct 1974Aug 2022Yes

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 20170047.933.21$0
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 201567042.892.93$2,874
Feb 20150044.662.98$0
Jan 201562043.433.10$2,693
Dec 20140054.693.59$0
Nov 20140070.464.25$0
Oct 201492078.303.90$7,204
Sep 20140086.164.05$0
Aug 20140089.394.04$0
Jul 201470096.564.18$6,759
Jun 20140098.164.74$0
May 201469094.734.73$6,536
Apr 2014160095.944.81$15,350
Mar 20140095.895.06$0
Feb 20140097.406.19$0
Jan 2014314090.404.86$28,386
Dec 20130091.824.35$0
Nov 20130088.853.74$0
Oct 2013145097.423.78$14,126
Sep 201300104.113.72$0
Aug 20131100104.253.52$11,468
Jul 201300102.523.72$0
Jun 2013159094.403.93$15,010
May 20130094.834.15$0
Apr 2013154093.964.28$14,470
Mar 2013157093.623.91$14,698
Feb 20130091.233.42$0
Jan 20130091.603.42$0
Dec 2012140086.773.42$12,148
Nov 20120086.953.62$0
Oct 2012147089.383.40$13,139
Sep 20120094.672.92$0
Aug 20120092.662.91$0
Jul 20120085.133.02$0
Jun 2012134079.822.52$10,696
May 20120091.612.49$0
Apr 20121520101.652.00$15,451
Mar 201200105.052.22$0
Feb 20121560101.102.57$15,772
Jan 20120098.092.73$0
Dec 20110096.873.24$0
Nov 20110095.723.31$0
Oct 201101,00384.983.65$3,659
Sep 20111541,00383.623.99$16,875
Aug 2011062983.404.15$2,610
Jul 20111481,12394.144.52$19,006
Jun 20111531,09492.904.64$19,290
May 201101,24198.134.40$5,466
Apr 20111591,624105.964.33$23,885
Mar 201101,48796.364.06$6,033
Feb 201114060185.644.18$14,502
Jan 20111582,06986.504.59$23,161
Dec 201001,82485.734.35$7,930
Nov 20101552,28480.843.80$21,199
Oct 20101611,62178.103.51$18,262
Sep 20106431,11772.633.98$51,146
Aug 20101591,95273.684.42$20,342
Jul 201009372.554.74$440
Jun 2010012570.364.91$614
May 2010084071.124.24$3,558
Apr 201015899381.694.12$17,001
Mar 20101551,03178.394.39$16,675
Feb 2010090973.585.44$4,947
Jan 2010077974.365.96$4,646
Dec 20091441,01171.445.48$15,831
Nov 200915898874.593.75$15,492
Oct 200901,22572.544.11$5,035
Sep 2009029665.543.06$907
Aug 2009092367.423.22$2,971
Jul 2009096461.133.46$3,340
Jun 2009091466.163.90$3,560
May 20091021,09554.743.93$9,882
Apr 2009058146.773.59$2,084
Mar 20091511,10242.144.06$10,836
Feb 2009070632.814.63$3,271
Jan 200911759235.865.37$7,375
Dec 2008059037.105.98$3,527
Nov 200817459055.496.86$13,703
Oct 2008065275.246.92$4,513
Sep 2008175756101.767.88$23,763
Aug 200801,057114.228.48$8,967
Jul 2008161661131.0811.39$28,632
Jun 200801,493131.3313.03$19,458
May 20081831,210123.1711.57$36,545
Apr 200801,033110.3110.45$10,800
Mar 2008161733101.909.66$23,490
Feb 200801,38092.538.77$12,103
Jan 20081671,72590.388.21$29,248
Dec 20071591,36688.337.30$24,019
Nov 200716889291.677.29$21,905
Oct 2007087182.856.92$6,029
Sep 2007085875.846.24$5,357
Aug 2007093669.066.39$5,979
Jul 2007079070.906.39$5,046
Jun 200714074362.007.55$14,289
May 200701,07358.747.85$8,419
Apr 2007090559.617.81$7,064
Mar 200701,38356.927.30$10,099
Feb 20071301,60655.108.22$20,358
Jan 200701,81050.306.73$12,176
Dec 20061511,71656.656.92$20,426
Nov 20061471,59154.207.62$20,087
Oct 200601,20754.906.01$7,259
Sep 200601,31060.085.04$6,599
Aug 20061291,14468.717.34$17,260
Jul 200601,14469.376.34$7,256
Jun 20061531,67966.286.38$20,859
May 200601,79866.016.42$11,552
Apr 2006691,79864.397.36$17,677
Mar 20061311,34156.707.08$16,926
Feb 200601,54157.597.75$11,944
Jan 20061571,58660.598.93$23,681
Dec 20053521,16454.9413.42$34,954
Nov 20051711,07154.6910.59$20,692
Oct 200501,12358.3413.80$15,493
Sep 20051661,11561.4512.08$23,669
Aug 200501,17261.519.80$11,482
Jul 20051561,11655.697.84$17,441
Jun 20051591,09152.337.38$16,373
May 20051681,20945.226.65$15,638
Apr 20051691,38349.207.36$18,494
Mar 2005080950.377.15$5,788
Feb 200517988745.226.31$13,693
Jan 200501,08843.166.32$6,879
Dec 200401,11539.866.75$7,527
Nov 200401,03945.286.33$6,577
Oct 20041711,13849.706.52$15,913
Sep 200401,21143.245.28$6,399
Aug 20041631,14042.375.55$13,234
Jul 200401,07938.286.08$6,565
Jun 20041091,07236.106.43$10,831
May 200401,14637.486.49$7,443
Apr 200401,14534.475.86$6,708
Mar 200415998034.365.53$10,883
Feb 200401,10432.455.51$6,083
Jan 20041211,29132.036.30$12,008
Dec 20031301,35730.266.30$12,485
Nov 20031661,45228.804.60$11,453
Oct 200301,10728.174.76$5,269
Sep 2003092926.314.75$4,412
Aug 2003090529.765.13$4,642
Jul 200301,31529.415.17$6,800
Jun 200301,04328.565.98$6,240
May 200301,13526.595.97$6,779
Apr 200301,06026.675.41$5,732
Mar 200301,21031.146.10$7,376
Feb 200301,13433.487.93$8,988
Jan 2003881,42930.315.58$10,644
Dec 2002921,47426.914.85$9,630
Nov 200201,44624.664.14$5,982
Oct 2002881,41126.464.23$8,296
Sep 2002951,39727.443.64$7,685
Aug 200201,46425.963.16$4,632
Jul 20021431,47624.583.06$8,034
Jun 200201,57123.733.34$5,244
May 20021621,63624.663.58$9,858
Apr 20021741,44623.653.51$9,194
Mar 20021781,42722.003.10$8,344
Feb 200201,29218.222.38$3,069
Jan 20021151,65317.172.38$5,902
Dec 20011611,63216.932.36$6,584
Nov 20011751,35618.072.41$6,424
Oct 200101,45519.782.53$3,680
Sep 20011621,46424.262.25$7,226
Aug 20011251,48824.873.05$7,652
Jul 200101,47623.933.20$4,719
Jun 20011182,15824.563.82$11,151
May 20012612,25125.524.31$16,357
Apr 20013412,63924.685.34$22,496
Mar 20013652,95924.545.38$24,866
Feb 200101,30227.755.77$7,509
Jan 20013161,48827.478.40$21,178
Dec 200001,53126.889.12$13,967
Nov 20005261,51332.215.66$25,503
Oct 200001,60931.235.15$8,279
Sep 20000031.875.19$0
Aug 200001,02829.644.54$4,668
Jul 200001,03828.534.09$4,245
Jun 2000058229.304.40$2,559
May 200001,02927.263.68$3,786
Apr 200001,21024.513.12$3,770
Mar 200001,21028.422.86$3,460
Feb 2000091127.622.73$2,484
Jan 200001,25325.272.48$3,108
Dec 19991621,24424.282.42$6,948
Nov 19991621,37523.192.43$7,104
Oct 19991761,30120.982.80$7,340
Sep 19991641,45621.752.62$7,380
Aug 19991691,61919.262.88$7,911
Jul 19993331,61917.892.37$9,798
Jun 19991661,53515.942.36$6,272
May 19993211,76815.792.32$9,172
Apr 19991641,65115.102.21$6,122
Mar 19993301,41012.471.84$6,707
Feb 19991631,0459.981.82$3,526
Jan 1999076610.381.90$1,455
Dec 199801,0099.201.77$1,789
Nov 19981701,18910.892.19$4,450
Oct 19981351,52512.421.97$4,680
Sep 19981651,01812.592.08$4,197
Aug 199817458211.301.91$3,076
Jul 199816878111.742.24$3,720
Jun 199832086111.242.24$5,523
May 199815982212.622.21$3,820
Apr 199832689913.042.51$6,503
Mar 199834591012.802.31$6,518
Feb 19985071,33813.952.30$10,149
Jan 19980114.702.15$2
Dec 19970116.322.41$2
Nov 1997110118.193.09$330
Oct 199749678619.253.15$12,024
Sep 19971881,11217.742.95$6,621
Aug 199732887617.862.55$8,096
Jul 19971083117.582.25$2,043
Jun 19973281,33717.242.26$8,673
May 19976891,64218.972.31$16,861
Apr 1997428717.882.08$669
Mar 199701,75618.951.94$3,405
Feb 19971692320.492.21$2,364
Jan 1997343323.483.54$1,603
Dec 199635560723.32$8,279
Nov 19961681,16221.97$3,691
Oct 19961881,36823.31$4,382
Sep 19964961,94422.22$11,021
Aug 19963381,43020.26$6,848
Jul 19965001,58819.55$9,775
Jun 19961661,12518.73$3,109
May 19963441,77919.43$6,684
Apr 19965111,19821.51$10,992
Mar 199611,05519.38$19
Feb 19961651,30816.98$2,802
Jan 19963441,54017.07$5,872
Dec 19953301,98417.19$5,673
Nov 19958254,18116.00$13,200
Oct 19952551,39215.43$3,935
Sep 199522352316.18$3,608
Aug 199516575515.92$2,627
Jul 199532171715.24$4,892
Jun 199524824616.41$4,070
May 199528417.56$35
Apr 199508117.73$0
Mar 19950016.44$0
Feb 19950016.58$0
Jan 19950015.92$0
Dec 19940015.03$0
Nov 19940015.90$0
Oct 1994073415.58$0
Sep 19940015.29$0
Aug 19940016.13$0
Jul 1994135017.56$2,371
Jun 19940017.09$0
May 19940015.88$0
Apr 19940114.14$0
Mar 19940012.46$0
Feb 19940012.50$0
Jan 199468012.66$861
Dec 19930012.33$0
Nov 19930014.49$0
Oct 19930015.85$0
Sep 19930015.03$0
Aug 19930015.66$0
Jul 19930015.46$0
Jun 19930016.79$0
May 19930017.68$0
Apr 19930018.05$0
Mar 19930018.14$0
Feb 19930017.90$0
Jan 19930016.93$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.

Mar 2015 — as filed, then multipliedworked
Oil                   67 bbl  × $ 42.89 =     $2,874
Casinghead gas         0 Mcf  × $  2.93 =         $0

────────────────────────────────────────────────────
Month total                                   $2,874

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/4586 is the state's own key, not one this site invented.