LOCKHART "A" 36

Operated by PRESIDIO PETROLEUM LLC (P-5 676084) in the FELDMAN (TONKAWA) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 4989District 10Field 30526750NGPA filingOilCasinghead gasSaveExport
Value, all time
$8.6 M
Jan 1993 – May 2026
Value, last 12 filed months
$20 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 140 leases and 207 wells, and the rule below applies to all of them.

Discovered
1957-04-27
as the register files it
Field class
Oil and gas
the register's own label
Between wells
660 ft
minimum
From a lease line
467 ft
minimum

A drilling unit in this field needs at least 160 acres. The field rule took effect on 2009-09-29.

The Commission's schedule remark for this field reads: FELDMAN (TONKAWA) FIELD.

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
NGPA3none

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
OilDisposition86,060 bbl$6,200,656
Casinghead gasProduction682,598 Mcf$2,444,996
Total$8,645,652

21,766 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 (5)

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 36.0045, -100.1577. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.8 miles.

36.00397, -100.15951 · centre of 4 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
40.0%
2 of 5 wells
With a plug date
40.0%
2 of 5 wells
Median depth
7,892 ft
5 wells filed one
Completion to plug
29.5 years
median over 2 wells

What the state filed about each well

On the RRC proration schedule
240.0%
A plug date is filed
240.0%
BothOn the schedule and plugged. Neither fact cancels the other.
240.0%
NeitherNo plug date, and not on the schedule.
360.0%

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 7,700 and 12,294 ft, median 7,892 ft, over the 5 wells that filed a depth.

Completions filed
Jan 1982 – Apr 2012
5 of 5 wells
Plug dates filed
Sep 2011 – Oct 2011
2 of 5 wells; 3 filed none

Last completion to plug: a median of 29.5 years across the 2 wells that filed both dates, with the middle half between 29.4 years and 29.6 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

5 wells

42-211349957HC7,700 ftApr 2012
42-21133530612,294 ftMay 2007
42-21133302511,203 ftNov 2005
42-2113146227,860 ftJun 1982Oct 2011Yes
42-2113140717,892 ftJan 1982Sep 2011Yes

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 20260595106.413.05$1,812
Apr 20260098.932.87$0
Mar 20260089.753.15$0
Feb 20260063.503.75$0
Jan 20260059.138.00$0
Dec 202501356.664.41$57
Nov 20251289658.593.93$7,876
Oct 2025018559.383.30$611
Sep 2025033162.743.08$1,018
Aug 2025033663.933.01$1,013
Jul 2025032566.743.32$1,077
Jun 202502,13766.483.13$6,686
May 202507160.553.23$229
Apr 20250062.363.54$0
Mar 202513576367.704.27$12,396
Feb 20251831,69470.884.34$20,324
Jan 20251911,75974.324.28$21,721
Dec 202402,00168.993.12$6,246
Nov 20241891,90369.052.20$17,234
Oct 202402,19171.372.28$4,999
Sep 20241902,31969.612.36$18,709
Aug 20241102,58775.632.06$13,658
Jul 20243052,75279.932.15$30,286
Jun 20243413,19778.082.63$35,046
May 202402,66378.812.20$5,854
Apr 202403984.451.66$65
Mar 20240080.301.55$0
Feb 202413772176.091.78$11,710
Jan 202401,06573.023.30$3,512
Dec 202301,47471.262.61$3,848
Nov 20231811,79677.892.81$19,140
Oct 20231801,97685.443.09$21,480
Sep 20231842,07489.042.74$22,056
Aug 20231802,14880.522.67$20,235
Jul 202302,13774.852.64$5,646
Jun 20231881,98568.962.26$17,448
May 20232601,96870.622.23$22,745
Apr 20231931,81178.122.24$19,130
Mar 202301,74472.852.39$4,174
Feb 20231971,53475.112.47$18,579
Jan 20231901,67576.533.39$20,215
Dec 202201,78676.415.73$10,232
Nov 20223082,04485.005.65$37,721
Oct 202202,31187.185.86$13,551
Sep 20223662,29784.888.16$49,818
Aug 202201,60594.529.13$14,649
Jul 20221852,047101.587.54$34,231
Jun 20221871,860115.097.98$36,359
May 202201,859109.378.43$15,677
Apr 20221912,099104.226.84$34,258
Mar 20221902,049108.885.08$31,089
Feb 20221901,77391.054.86$25,914
Jan 20221901,81881.844.54$23,799
Dec 202101,96771.323.90$7,670
Nov 20211932,02777.435.24$25,559
Oct 20211862,20279.795.71$27,423
Sep 20211882,10769.865.35$24,408
Aug 20211852,21766.024.22$21,571
Jul 20211812,22770.783.98$21,679
Jun 20211732,19569.493.38$19,442
May 20211782,38163.483.02$18,485
Apr 20211791,67960.362.76$15,436
Mar 20213831,87561.302.72$28,572
Feb 202101,16857.805.55$6,480
Jan 20210050.412.81$0
Dec 2020811,13044.642.68$6,639
Nov 2020902,07338.772.71$9,100
Oct 20202952,24236.972.48$16,463
Sep 20201842,24337.091.99$11,290
Aug 20201832,35239.982.39$12,926
Jul 20201892,47038.371.83$11,760
Jun 20201912,46934.901.69$10,839
May 202002,55916.921.81$4,644
Apr 20203782,57614.751.80$10,224
Mar 20201832,65830.341.86$10,486
Feb 20201752,56749.881.98$13,813
Jan 20201802,81757.252.09$16,206
Dec 20191823,06659.012.30$17,805
Nov 20191822,99055.302.75$18,289
Oct 20191823,01353.472.42$17,019
Sep 20191803,08455.052.66$18,104
Aug 20191823,42953.112.30$17,568
Jul 20191813,56356.272.46$18,950
Jun 20191813,76852.782.49$18,940
May 20195524,29458.482.74$44,048
Apr 20193664,06862.632.75$34,112
Mar 201901,26756.803.06$3,880
Feb 201901,94050.852.79$5,417
Jan 20193633,53546.033.23$28,121
Dec 20181833,60346.594.19$23,606
Nov 20181783,40452.934.24$23,845
Oct 20185063,80461.443.40$44,015
Sep 20181783,74059.543.11$22,222
Aug 20181844,01459.403.07$23,239
Jul 20181794,32665.142.93$24,343
Jun 20183544,19760.183.08$34,218
May 20183544,52765.382.90$36,276
Apr 20181784,45463.842.90$24,284
Mar 20185444,77161.222.79$46,600
Feb 20183544,39961.782.77$34,038
Jan 20181764,68962.874.01$29,865
Dec 20173505,65057.272.92$36,551
Nov 20175355,74455.423.12$47,562
Oct 20175376,23949.292.98$45,084
Sep 20173695,42847.523.09$34,293
Aug 20173595,39745.373.00$32,503
Jul 201752424143.873.09$23,732
Jun 201736024142.493.09$16,040
May 20175425,20045.373.26$41,560
Apr 20177285,07247.933.21$51,182
Mar 20173624,43846.772.98$30,172
Feb 20173653,82350.452.95$29,702
Jan 20173744,36249.413.42$33,392
Dec 20169035,18148.763.72$63,318
Nov 20163673,85542.492.64$25,788
Oct 20167225,25846.193.09$49,598
Sep 20165294,53741.553.10$36,048
Aug 20161792,29241.442.92$14,120
Jul 20161811,73141.622.92$12,595
Jun 20163592,44945.352.69$22,858
May 20163622,85142.521.99$21,069
Apr 20163472,79836.561.99$18,257
Mar 20163642,98933.011.79$17,378
Feb 20163652,57826.472.06$14,982
Jan 20165672,00627.352.36$20,250
Dec 20151882,85832.362.00$11,804
Nov 20153662,59838.792.17$19,828
Oct 20155463,04443.552.43$31,165
Sep 20153602,00842.992.76$21,015
Aug 20153572,66440.162.87$21,989
Jul 20153572,58448.152.95$24,800
Jun 20155353,09256.152.88$38,954
May 20155463,33755.212.96$40,007
Apr 20153603,35449.822.71$27,013
Mar 20157373,65142.892.93$42,325
Feb 20157293,26844.662.98$42,283
Jan 20155743,05243.433.10$34,392
Dec 20143772,93954.693.59$31,173
Nov 20141911,64170.464.25$20,435
Oct 201418581078.303.90$17,645
Sep 20145644,27986.164.05$65,905
Aug 20147184,33389.394.04$81,666
Jul 20145504,82596.564.18$73,275
Jun 20145495,27198.164.74$78,858
May 20145375,97294.734.73$79,097
Apr 20145936,08595.944.81$86,156
Mar 20149196,70995.895.06$122,049
Feb 20149196,42997.406.19$129,319
Jan 20147047,08090.404.86$98,056
Dec 20131,0656,75691.824.35$127,207
Nov 20138936,09888.853.74$102,139
Oct 20138936,68397.423.78$112,254
Sep 20138746,841104.113.72$116,425
Aug 20131,3998,075104.253.52$174,291
Jul 20137019,036102.523.72$105,460
Jun 20131,3879,41094.403.93$167,946
May 20131,23210,10694.834.15$158,761
Apr 20131,3609,21093.964.28$167,228
Mar 20131,8398,86293.623.91$206,843
Feb 20131,1409,49591.233.42$136,474
Jan 20132,01912,18691.603.42$226,615
Dec 20121,69111,26986.773.42$185,270
Nov 20121,80410,84886.953.62$196,181
Oct 20121,82810,33989.383.40$198,536
Sep 20122,26610,76694.672.92$245,942
Aug 20123,01013,47792.662.91$318,100
Jul 20123,48015,41185.133.02$342,806
Jun 20124,36815,60979.822.52$387,973
May 20124,0478,40391.612.49$391,655
Apr 20120614101.652.00$1,226
Mar 20120661105.052.22$1,469
Feb 20120627101.102.57$1,612
Jan 2012061998.092.73$1,692
Dec 2011061996.873.24$2,005
Nov 2011067795.723.31$2,242
Oct 201119070184.983.65$18,704
Sep 2011065983.623.99$2,627
Aug 201118670383.404.15$18,429
Jul 2011067194.144.52$3,031
Jun 2011068692.904.64$3,183
May 2011071898.134.40$3,163
Apr 2011191685105.964.33$23,207
Mar 201119774696.364.06$22,010
Feb 2011059585.644.18$2,487
Jan 2011070986.504.59$3,253
Dec 2010071985.734.35$3,126
Nov 2010070580.843.80$2,676
Oct 2010078278.103.51$2,744
Sep 2010074972.633.98$2,981
Aug 201037580473.684.42$31,183
Jul 2010066972.554.74$3,169
Jun 201018860970.364.91$16,218
May 2010075171.124.24$3,181
Apr 201019065481.694.12$18,217
Mar 2010075178.394.39$3,296
Feb 2010068273.585.44$3,712
Jan 2010074574.365.96$4,443
Dec 2009080171.445.48$4,392
Nov 2009082074.593.75$3,076
Oct 2009058972.544.11$2,421
Sep 2009075365.543.06$2,308
Aug 2009076867.423.22$2,472
Jul 200919676161.133.46$14,618
Jun 2009072666.163.90$2,828
May 2009094554.743.93$3,710
Apr 200948588846.773.59$25,869
Mar 2009098242.144.06$3,986
Feb 2009041232.814.63$1,909
Jan 2009092135.865.37$4,947
Dec 2008090037.105.98$5,379
Nov 2008088755.496.86$6,085
Oct 200820192775.246.92$21,540
Sep 20080945101.767.88$7,444
Aug 20080907114.228.48$7,694
Jul 2008198948131.0811.39$36,751
Jun 20080984131.3313.03$12,824
May 200801,036123.1711.57$11,991
Apr 20082021,029110.3110.45$33,041
Mar 200801,075101.909.66$10,389
Feb 2008048592.538.77$4,254
Jan 2008072090.388.21$5,908
Dec 200720399388.337.30$25,182
Nov 200701,10791.677.29$8,072
Oct 200701,17082.856.92$8,099
Sep 200701,17575.846.24$7,337
Aug 20072001,23669.066.39$21,707
Jul 20072001,21970.906.39$21,967
Jun 200701,19462.007.55$9,013
May 20072011,23558.747.85$21,497
Apr 2007199059.617.81$11,862
Mar 200701,07156.927.30$7,820
Feb 20071931,11555.108.22$19,795
Jan 200701,13050.306.73$7,601
Dec 200601,33456.656.92$9,229
Nov 20060054.207.62$0
Oct 20060054.906.01$0
Sep 20060060.085.04$0
Aug 20060068.717.34$0
Jul 20060069.376.34$0
Jun 20060066.286.38$0
May 20060066.016.42$0
Apr 20060064.397.36$0
Mar 20061991,44856.707.08$21,539
Feb 20061941,42457.597.75$22,210
Jan 20065902,83960.598.93$61,110
Dec 20053962,83954.9413.42$59,843
Nov 200501,84854.6910.59$19,567
Oct 20050058.3413.80$0
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 20030030.266.30$0
Nov 20030028.804.60$0
Oct 20030028.174.76$0
Sep 20030026.314.75$0
Aug 20030029.765.13$0
Jul 20030029.415.17$0
Jun 20030028.565.98$0
May 20030026.595.97$0
Apr 20030026.675.41$0
Mar 20030031.146.10$0
Feb 20030033.487.93$0
Jan 20030030.315.58$0
Dec 20020026.914.85$0
Nov 20020024.664.14$0
Oct 20020026.464.23$0
Sep 20020027.443.64$0
Aug 20020025.963.16$0
Jul 20020024.583.06$0
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 20010016.932.36$0
Nov 20010018.072.41$0
Oct 20010019.782.53$0
Sep 20010024.262.25$0
Aug 20010024.873.05$0
Jul 20010023.933.20$0
Jun 20010024.563.82$0
May 20010025.524.31$0
Apr 20010024.685.34$0
Mar 20010024.545.38$0
Feb 20010027.755.77$0
Jan 20010027.478.40$0
Dec 20000026.889.12$0
Nov 20000032.215.66$0
Oct 20000031.235.15$0
Sep 20000031.875.19$0
Aug 20000029.644.54$0
Jul 20000028.534.09$0
Jun 20000029.304.40$0
May 20000027.263.68$0
Apr 20000024.513.12$0
Mar 20000028.422.86$0
Feb 20000027.622.73$0
Jan 20000125.272.48$2
Dec 19990124.282.42$2
Nov 1999202123.192.43$4,687
Oct 19990120.982.80$3
Sep 1999197021.752.62$4,285
Aug 1999370019.262.88$7,126
Jul 1999190017.892.37$3,399
Jun 19990015.942.36$0
May 19990015.792.32$0
Apr 19990015.102.21$0
Mar 19990112.471.84$2
Feb 1999009.981.82$0
Jan 19990010.381.90$0
Dec 1998019.201.77$2
Nov 19980110.892.19$2
Oct 19980112.421.97$2
Sep 19980112.592.08$2
Aug 19980111.301.91$2
Jul 19980111.742.24$2
Jun 19980111.242.24$2
May 19980112.622.21$2
Apr 199801713.042.51$43
Mar 1998014112.802.31$326
Feb 199803413.952.30$78
Jan 19980014.702.15$0
Dec 199707116.322.41$171
Nov 1997022518.193.09$695
Oct 199718127119.253.15$4,338
Sep 1997127817.742.95$839
Aug 199718729417.862.55$4,091
Jul 1997037517.582.25$843
Jun 199707217.242.26$163
May 19970018.972.31$0
Apr 19970117.882.08$2
Mar 199708118.951.94$157
Feb 199708920.492.21$196
Jan 19971819223.483.54$4,576
Dec 199601723.32$0
Nov 1996039921.97$0
Oct 1996030823.31$0
Sep 199611535822.22$2,555
Aug 1996035720.26$0
Jul 19966836119.55$1,329
Jun 199615939018.73$2,978
May 1996045919.43$0
Apr 1996045221.51$0
Mar 19969947919.38$1,919
Feb 199617941116.98$3,039
Jan 1996040617.07$0
Dec 1995050117.19$0
Nov 199517444316.00$2,784
Oct 1995028915.43$0
Sep 1995016816.18$0
Aug 1995044715.92$0
Jul 199517547315.24$2,667
Jun 1995045216.41$0
May 1995042617.56$0
Apr 19959033517.73$1,596
Mar 1995032116.44$0
Feb 1995036116.58$0
Jan 199518057415.92$2,866
Dec 1994077015.03$0
Nov 199417460215.90$2,767
Oct 1994072515.58$0
Sep 199417390315.29$2,645
Aug 199417399116.13$2,790
Jul 199417417617.56$3,055
Jun 199418071717.09$3,076
May 1994056615.88$0
Apr 199418548814.14$2,616
Mar 1994011112.46$0
Feb 199418550612.50$2,313
Jan 1994012312.66$0
Dec 199318863612.33$2,318
Nov 1993050014.49$0
Oct 1993011715.85$0
Sep 199318148415.03$2,720
Aug 1993068015.66$0
Jul 1993062615.46$0
Jun 199318440116.79$3,089
May 1993044417.68$0
Apr 1993056818.05$0
Mar 199319363918.14$3,501
Feb 1993035917.90$0
Jan 199317844716.93$3,014

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                    0 bbl  × $106.41 =         $0
Casinghead gas       595 Mcf  × $  3.05 =     $1,812

────────────────────────────────────────────────────
Month total                                   $1,812

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/4989 is the state's own key, not one this site invented.