LAMBERT, M. F.

Operated by HILCORP ENERGY COMPANY (P-5 386310) in the GRETA (4400) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 4001District 02Field 36867780OilCasinghead gasSaveExport
Value, all time
$8.8 M
Jan 1993 – May 2026
Value, last 12 filed months
$1.5 M
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 63 leases and 296 wells, and the rule below applies to all of them.

Discovered
1963-05-22
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 25 acres. The field rule took effect on 2020-12-08.

The Commission's schedule remark for this field reads: CHANGED MIN. ACRES FROM 25 TO 40, AND ADDED OPTIONAL ACRES.

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
OilDisposition140,959 bbl$8,232,381
Casinghead gasProduction211,293 Mcf$529,608
Total$8,761,989

94,095 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 (13)

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 28.3698, -97.1836. A lease has no coordinate of its own — that point is the mean of its wells, and they span 1.2 miles.

28.36761, -97.18408 · 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
46.2%
6 of 13 wells
With a plug date
38.5%
5 of 13 wells
Median depth
5,158 ft
11 wells filed one
Completion to plug
40.3 years
median over 4 wells

What the state filed about each well

On the RRC proration schedule
646.2%
A plug date is filed
538.5%
BothOn the schedule and plugged. Neither fact cancels the other.
538.5%
NeitherNo plug date, and not on the schedule.
753.8%

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, 11 of 13 wells. Median 5,158 ft, with the middle half between 4,547 and 5,671 ft; the shallowest is 4,330 ft and the deepest 6,507 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, 10 of 13 wells, Feb 1934 – Jun 2024. 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 1934 – Jun 2024
10 of 13 wells; 3 filed none
Plug dates filed
May 1971 – May 2026
5 of 13 wells; 8 filed none

Last completion to plug: a median of 40.3 years across the 4 wells that filed both dates, with the middle half between 28.0 years and 47.1 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

13 wells

42-39101207134,330 ftMay 2026Yes
42-391011198
42-3910120612
42-391312891444,535 ftJun 2024
42-39101205H 196,269 ftJul 2021Aug 2021Yes
42-39101209145,158 ftMar 2021
42-39101210156,507 ftMar 2009Yes
42-39101188835,930 ftApr 2007
42-39131384H1184,552 ftMar 1980
42-39131371H1144,542 ftFeb 1980Jun 2023Yes
42-39131298H1124,762 ftDec 1978
42-3910111875,412 ftMar 1963Jul 2021Yes
42-3910111465,412 ftFeb 1934May 1971Yes

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 20261,78711106.413.05$190,188
Apr 20261,7321898.932.87$171,398
Mar 20261,723889.753.15$154,664
Feb 20261,461763.503.75$92,800
Jan 20261,699759.138.00$100,518
Dec 20251,844256.664.41$104,490
Nov 20251,5891258.593.93$93,147
Oct 20251,466059.383.30$87,051
Sep 20252,299662.743.08$144,258
Aug 20252,4221263.933.01$154,875
Jul 20251,9592066.743.32$130,810
Jun 20251,1596566.483.13$77,254
May 20251,4991160.553.23$90,800
Apr 20252,0791962.363.54$129,714
Mar 20252,3172367.704.27$156,959
Feb 20252,0841470.884.34$147,775
Jan 20251,62031774.324.28$121,755
Dec 20242,32133968.993.12$161,184
Nov 20242,0242769.052.20$139,817
Oct 20242,1552471.372.28$153,857
Sep 20242,343069.612.36$163,096
Aug 20242,7481475.632.06$207,860
Jul 20242,578479.932.15$206,068
Jun 20242,7859178.082.63$217,692
May 20241,9451,25178.812.20$156,036
Apr 2024366784.451.66$30,920
Mar 20240080.301.55$0
Feb 20240076.091.78$0
Jan 202424073.023.30$1,752
Dec 20231091371.262.61$7,801
Nov 20232272377.892.81$17,746
Oct 2023196085.443.09$16,746
Sep 20231991089.042.74$17,746
Aug 20232492980.522.67$20,127
Jul 202328657274.852.64$22,918
Jun 202315243568.962.26$11,464
May 20230070.622.23$0
Apr 202326078.122.24$2,031
Mar 20231212,58772.852.39$15,006
Feb 2023309075.112.47$23,209
Jan 202339926776.533.39$31,440
Dec 202235494776.415.73$32,475
Nov 20223163,00785.005.65$43,838
Oct 20223361,41687.185.86$37,596
Sep 20224413,46984.888.16$65,752
Aug 20224901,51594.529.13$60,142
Jul 202257038101.587.54$58,187
Jun 20222292115.097.98$26,372
May 20223764109.378.43$41,157
Apr 20225790104.226.84$60,343
Mar 20226430108.885.08$70,010
Feb 2022632091.054.86$57,544
Jan 20227333081.844.54$60,125
Dec 2021714071.323.90$50,922
Nov 20216513177.435.24$50,569
Oct 20216598279.795.71$53,050
Sep 2021525069.865.35$36,677
Aug 2021171566.024.22$11,311
Jul 20210070.783.98$0
Jun 20210069.493.38$0
May 202111063.483.02$698
Apr 2021312160.362.76$1,929
Mar 2021611661.302.72$3,783
Feb 2021592557.805.55$3,549
Jan 20211478650.412.81$7,652
Dec 2020297044.642.68$13,258
Nov 2020314038.772.71$12,174
Oct 2020307036.972.48$11,350
Sep 2020220037.091.99$8,160
Aug 2020140039.982.39$5,597
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 202010049.881.98$499
Jan 2020512157.252.09$2,964
Dec 201945359.012.30$2,662
Nov 2019362355.302.75$2,054
Oct 2019331453.472.42$1,798
Sep 20191341755.052.66$7,422
Aug 2019146053.112.30$7,754
Jul 20198017456.272.46$4,930
Jun 2019641952.782.49$3,425
May 20195316458.482.74$3,549
Apr 201984062.632.75$5,261
Mar 2019274456.803.06$1,668
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 201617027.352.36$465
Dec 2015606732.362.00$2,076
Nov 201574038.792.17$2,870
Oct 201515235343.552.43$7,476
Sep 201513054342.992.76$7,087
Aug 2015025340.162.87$727
Jul 20152125448.152.95$1,759
Jun 201510257256.152.88$7,376
May 201514760255.212.96$9,895
Apr 201514534049.822.71$8,144
Mar 201511518942.892.93$5,487
Feb 201510810344.662.98$5,130
Jan 20157548843.433.10$4,770
Dec 20148334054.693.59$5,760
Nov 201410611570.464.25$7,958
Oct 20141108678.303.90$8,948
Sep 201414128386.164.05$13,293
Aug 201432388889.394.04$32,456
Jul 201439474296.564.18$41,146
Jun 201440072198.164.74$42,679
May 201459668194.734.73$59,678
Apr 201468320895.944.81$66,527
Mar 20148721195.895.06$83,672
Feb 20144289497.406.19$42,269
Jan 20146003990.404.86$54,430
Dec 201370652091.824.35$67,089
Nov 201375088988.853.74$69,961
Oct 201378674497.423.78$79,384
Sep 2013577154104.113.72$60,644
Aug 2013635118104.253.52$66,614
Jul 2013742111102.523.72$76,483
Jun 20135637994.403.93$53,458
May 20131,11744894.834.15$107,784
Apr 20131,69764593.964.28$162,212
Mar 20131,56831793.623.91$148,037
Feb 20131,32122591.233.42$121,284
Jan 20131,31314391.603.42$120,760
Dec 20121,36018886.773.42$118,650
Nov 20121,20913086.953.62$105,594
Oct 201296313189.383.40$86,518
Sep 20121,07817594.672.92$102,565
Aug 20129147092.662.91$84,895
Jul 20128752585.133.02$8,992
Jun 2012514679.822.52$767
May 20120091.612.49$0
Apr 201200101.652.00$0
Mar 201200105.052.22$0
Feb 201200101.102.57$0
Jan 20120098.092.73$0
Dec 20110096.873.24$0
Nov 20110095.723.31$0
Oct 20110084.983.65$0
Sep 20110083.623.99$0
Aug 20110083.404.15$0
Jul 20110094.144.52$0
Jun 20110092.904.64$0
May 20110098.134.40$0
Apr 201100105.964.33$0
Mar 20110096.364.06$0
Feb 20110085.644.18$0
Jan 20110086.504.59$0
Dec 20100085.734.35$0
Nov 20100080.843.80$0
Oct 20100078.103.51$0
Sep 20100072.633.98$0
Aug 20100073.684.42$0
Jul 20100072.554.74$0
Jun 2010520070.364.91$36,587
May 20100071.124.24$0
Apr 2010024181.694.12$994
Mar 201013412978.394.39$11,070
Feb 20101191573.585.44$8,838
Jan 201088074.365.96$6,544
Dec 2009033371.445.48$1,826
Nov 20095223574.593.75$4,760
Oct 200911732672.544.11$9,827
Sep 2009019565.543.06$598
Aug 20097134767.423.22$5,904
Jul 200915998761.133.46$13,139
Jun 20094431366.163.90$4,130
May 200916227254.743.93$9,936
Apr 2009027346.773.59$979
Mar 20097828842.144.06$4,456
Feb 200912429132.814.63$5,417
Jan 2009029835.865.37$1,601
Dec 200837981837.105.98$18,950
Nov 200832864855.496.86$22,646
Oct 2008081975.246.92$5,669
Sep 20080538101.767.88$4,238
Aug 2008371589114.228.48$47,372
Jul 20080642131.0811.39$7,312
Jun 200886774131.3313.03$21,382
May 2008147533123.1711.57$24,275
Apr 2008160724110.3110.45$25,219
Mar 20080576101.909.66$5,567
Feb 200824055392.538.77$27,057
Jan 200816258490.388.21$19,434
Dec 200725386388.337.30$28,649
Nov 200730676791.677.29$33,644
Oct 2007080482.856.92$5,565
Sep 2007075975.846.24$4,739
Aug 20074451,01569.066.39$37,215
Jul 200701,37570.906.39$8,783
Jun 20072101,89262.007.55$27,302
May 20074822058.747.85$28,470
Apr 2007057059.617.81$4,449
Mar 200728358956.927.30$20,409
Feb 200733964455.108.22$23,970
Jan 2007071350.306.73$4,796
Dec 200643346556.656.92$27,747
Nov 200642045054.207.62$26,192
Oct 200640946554.906.01$25,251
Sep 200633884060.085.04$24,538
Aug 200668889468.717.34$53,834
Jul 200636374469.376.34$29,900
Jun 200677969066.286.38$56,037
May 200657666766.016.42$42,307
Apr 2006036064.397.36$2,650
Mar 20060056.707.08$0
Feb 20060057.597.75$0
Jan 20060060.598.93$0
Dec 20050054.9413.42$0
Nov 20050054.6910.59$0
Oct 200514,39858.3413.80$60,732
Sep 20050061.4512.08$0
Aug 20050061.519.80$0
Jul 20050055.697.84$0
Jun 20050052.337.38$0
May 20050045.226.65$0
Apr 20050049.207.36$0
Mar 20050050.377.15$0
Feb 20050045.226.31$0
Jan 20050043.166.32$0
Dec 20040039.866.75$0
Nov 20040045.286.33$0
Oct 20040049.706.52$0
Sep 20040043.245.28$0
Aug 20040042.375.55$0
Jul 20040038.286.08$0
Jun 20040036.106.43$0
May 20040037.486.49$0
Apr 20040034.475.86$0
Mar 20040034.365.53$0
Feb 20040032.455.51$0
Jan 20040032.036.30$0
Dec 20031030.266.30$30
Nov 2003345028.804.60$2,154
Oct 20031105028.174.76$3,337
Sep 2003477826.314.75$1,607
Aug 20033088129.765.13$9,582
Jul 20031783329.415.17$5,406
Jun 20037333228.565.98$21,126
May 20031693226.595.97$4,685
Apr 20033503626.675.41$9,529
Mar 2003010331.146.10$628
Feb 2003828133.487.93$27,729
Jan 200307430.315.58$413
Dec 200204526.914.85$218
Nov 2002023224.664.14$960
Oct 2002013926.464.23$588
Sep 200205027.443.64$182
Aug 200204525.963.16$142
Jul 2002843024.583.06$20,721
Jun 20020023.733.34$0
May 20020024.663.58$0
Apr 20020023.653.51$0
Mar 20020022.003.10$0
Feb 20020018.222.38$0
Jan 20020017.172.38$0
Dec 2001322016.932.36$5,451
Nov 2001703018.072.41$12,703
Oct 20010019.782.53$0
Sep 20010024.262.25$0
Aug 2001076024.873.05$2,320
Jul 200101,35223.933.20$4,322
Jun 2001351024.563.82$8,621
May 20010025.524.31$0
Apr 2001696024.685.34$17,177
Mar 20010024.545.38$0
Feb 20010027.755.77$0
Jan 20010027.478.40$0
Dec 20000026.889.12$0
Nov 2000358032.215.66$11,531
Oct 20000031.235.15$0
Sep 2000796031.875.19$25,369
Aug 20000029.644.54$0
Jul 20000028.534.09$0
Jun 2000344029.304.40$10,079
May 2000837027.263.68$22,817
Apr 20000024.513.12$0
Mar 20000128.422.86$3
Feb 2000340127.622.73$9,394
Jan 2000844125.272.48$21,330
Dec 19990124.282.42$2
Nov 1999050023.192.43$1,217
Oct 199933952320.982.80$8,579
Sep 199984255121.752.62$19,756
Aug 1999062319.262.88$1,792
Jul 199933366617.892.37$7,537
Jun 19998302,23815.942.36$18,517
May 199902,24415.792.32$5,208
Apr 199901,50815.102.21$3,330
Mar 19992991,35712.471.84$6,223
Feb 199901,2919.981.82$2,347
Jan 19998141,37510.381.90$11,062
Dec 199801,3519.201.77$2,396
Nov 199801,38810.892.19$3,034
Oct 19983281,34512.421.97$6,722
Sep 199801,38812.592.08$2,891
Aug 19988221,37611.301.91$11,913
Jul 199801,61111.742.24$3,604
Jun 199801,32111.242.24$2,955
May 19983351,65912.622.21$7,888
Apr 19981641,46613.042.51$5,811
Mar 19986761,77412.802.31$12,750
Feb 199801,40013.952.30$3,219
Jan 19983211,69514.702.15$8,371
Dec 19976511,77416.322.41$14,902
Nov 199701,74418.193.09$5,386
Oct 199701,97319.253.15$6,215
Sep 19973321,33317.742.95$9,829
Aug 19976631,70717.862.55$16,202
Jul 1997077817.582.25$1,748
Jun 1997084517.242.26$1,907
May 19973381,78018.972.31$10,521
Apr 199702,25617.882.08$4,699
Mar 19973401,85818.951.94$10,046
Feb 19976491,89620.492.21$17,480
Jan 19976481,53423.483.54$20,645
Dec 199602,02023.32$0
Nov 19965141,46521.97$11,293
Oct 199601,89123.31$0
Sep 19968122,05222.22$18,043
Aug 199602,13120.26$0
Jul 19968262,18119.55$16,148
Jun 19968362,31218.73$15,658
May 199602,42819.43$0
Apr 19968422,28621.51$18,111
Mar 199602,41119.38$0
Feb 19968102,20116.98$13,754
Jan 19968512,22417.07$14,527
Dec 199502,38817.19$0
Nov 19958291,75316.00$13,264
Oct 199501,81215.43$0
Sep 19958361,84916.18$13,526
Aug 199501,99315.92$0
Jul 19958262,00715.24$12,588
Jun 199502,17816.41$0
May 19958052,48017.56$14,136
Apr 19958532,53417.73$15,124
Mar 199502,38116.44$0
Feb 19956372,47016.58$10,561
Jan 19956741,94315.92$10,730
Dec 19941642,27215.03$2,465
Nov 19946722,25715.90$10,685
Oct 19943482,55015.58$5,422
Sep 19946793,02615.29$10,382
Aug 19946654,05916.13$10,726
Jul 19947364,42417.56$12,924
Jun 19941,31896317.09$22,525
May 1994082715.88$0
Apr 19941,1971,04214.14$16,926
Mar 19949021,21112.46$11,239
Feb 1994097712.50$0
Jan 19948731,23512.66$11,052
Dec 19931,1501,18112.33$14,180
Nov 199354798814.49$7,926
Oct 19935051,48415.85$8,004
Sep 19931,0301,44815.03$15,481
Aug 19937301,57915.66$11,432
Jul 19936731,91415.46$10,405
Jun 19936701,75016.79$11,249
May 19936632,05417.68$11,722
Apr 199301,18718.05$0
Mar 19936441,25718.14$11,682
Feb 19937481,39817.90$13,389
Jan 199301,62216.93$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.

May 2026 — as filed, then multipliedworked
Oil                1,787 bbl  × $106.41 =   $190,155
Casinghead gas        11 Mcf  × $  3.05 =        $34

────────────────────────────────────────────────────
Month total                                 $190,188

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. 02/O/4001 is the state's own key, not one this site invented.