WELDER, J.F. HEIRS

Operated by PROLINE ENERGY RESOURCES INC (P-5 681327) in the ANGELITA NEW (FRIO) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 12778District 04Field 02868142OilCasinghead gasSaveExport
Value, all time
$7.2 M
Mar 1998 – May 2026
Value, last 12 filed months
$77 k
at the published price for each month
Months reported
339
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 10 leases and 14 wells, and the rule below applies to all of them.

Discovered
1962-11-03
as the register files it
Field class
Oil and gas
the register's own label
Between wells
no field rule filed
From a lease line
no field rule filed

The Commission's schedule remark for this field reads: AOF-1 AND AOF-2 EFFECTIVE 04/01/2002.

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
OilDisposition78,693 bbl$3,447,668
Casinghead gasProduction906,506 Mcf$3,799,988
Total$7,247,655

Wells on this lease (2)

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 27.9087, -97.6545. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.4 miles.

27.90874, -97.65447 · 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
50.0%
1 of 2 wells
With a plug date
50.0%
1 of 2 wells
Median depth
7,705 ft
2 wells filed one
Completion to plug
23.4 years
median over 1 well

What the state filed about each well

On the RRC proration schedule
150.0%
A plug date is filed
150.0%
BothOn the schedule and plugged. Neither fact cancels the other.
150.0%
NeitherNo plug date, and not on the schedule.
150.0%

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 7,601 and 7,809 ft, median 7,705 ft, over the 2 wells that filed a depth.

Completions filed
Jan 1999 – Jun 2011
2 of 2 wells
Plug dates filed
Jun 2022
1 of 2 wells; 1 filed none

Last completion to plug: a median of 23.4 years across the 1 well that filed both dates, with the middle half between 23.4 years and 23.4 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

2 wells

42-40903850S 17,601 ftJun 2011
42-40903870F 17,809 ftJan 1999Jun 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 (339)

Volume × price = value, one row per cycle. The price columns are the same series published on the prices page — nothing here is modelled.

339 months

May 20261130106.413.05$12,024
Apr 202617029598.932.87$17,665
Mar 2026045689.753.15$1,436
Feb 2026042063.503.75$1,575
Jan 202617939459.138.00$13,735
Dec 2025046256.664.41$2,039
Nov 202517144758.593.93$11,774
Oct 2025024259.383.30$800
Sep 202517143262.743.08$12,058
Aug 2025027563.933.01$829
Jul 2025046566.743.32$1,542
Jun 2025045066.483.13$1,408
May 2025046560.553.23$1,503
Apr 202517345062.363.54$12,383
Mar 2025046567.704.27$1,985
Feb 202517142070.884.34$13,944
Jan 202516645674.324.28$14,288
Dec 2024046568.993.12$1,451
Nov 2024045069.052.20$989
Oct 202416546571.372.28$12,837
Sep 2024045069.612.36$1,064
Aug 2024042175.632.06$869
Jul 202417319779.932.15$14,251
Jun 2024019778.082.63$519
May 202417312478.812.20$13,907
Apr 2024012084.451.66$199
Mar 202416610680.301.55$13,494
Feb 202415912176.091.78$12,314
Jan 2024016273.023.30$534
Dec 2023014271.262.61$371
Nov 202301777.892.81$48
Oct 2023052785.443.09$1,627
Sep 202317547189.042.74$16,870
Aug 2023047180.522.67$1,259
Jul 202317849674.852.64$14,634
Jun 2023046868.962.26$1,057
May 202316717570.622.23$12,183
Apr 2023020878.122.24$465
Mar 202317245672.852.39$13,621
Feb 2023031775.112.47$782
Jan 2023033176.533.39$1,121
Dec 202218223976.415.73$15,276
Nov 2022034985.005.65$1,971
Oct 20221809987.185.86$16,273
Sep 2022025384.888.16$2,065
Aug 202217933294.529.13$19,949
Jul 20220254101.587.54$1,916
Jun 2022180164115.097.98$22,024
May 20220416109.378.43$3,508
Apr 2022185363104.226.84$21,763
Mar 20220272108.885.08$1,381
Feb 202218429991.054.86$18,206
Jan 2022039081.844.54$1,770
Dec 202117739071.323.90$14,144
Nov 2021030877.435.24$1,613
Oct 202117254079.795.71$16,809
Sep 2021071269.865.35$3,810
Aug 202118171266.024.22$14,955
Jul 2021089970.783.98$3,580
Jun 2021089969.493.38$3,039
May 202117989963.483.02$14,076
Apr 202117920060.362.76$11,356
Mar 2021029761.302.72$807
Feb 2021021457.805.55$1,187
Jan 202118041850.412.81$10,248
Dec 2020062844.642.68$1,680
Nov 202018257838.772.71$8,621
Oct 2020058236.972.48$1,442
Sep 20200037.091.99$0
Aug 2020180039.982.39$7,196
Jul 20200038.371.83$0
Jun 2020182034.901.69$6,352
May 2020112016.921.81$1,895
Apr 2020112014.751.80$1,652
Mar 2020158030.341.86$4,794
Feb 20200049.881.98$0
Jan 2020182057.252.09$10,420
Dec 2019037059.012.30$853
Nov 2019037055.302.75$1,018
Oct 201915924053.472.42$9,082
Sep 20199418155.052.66$5,656
Aug 20199418153.112.30$5,409
Jul 2019020856.272.46$512
Jun 201925119352.782.49$13,729
May 2019019358.482.74$529
Apr 201918235362.632.75$12,370
Mar 2019031956.803.06$977
Feb 201916727250.852.79$9,251
Jan 201917047446.033.23$9,355
Dec 2018030146.594.19$1,260
Nov 2018179052.934.24$9,474
Oct 201818037561.443.40$12,333
Sep 2018027059.543.11$839
Aug 2018016259.403.07$497
Jul 20180065.142.93$0
Jun 2018169060.183.08$10,170
May 201818039765.382.90$12,920
Apr 2018031163.842.90$902
Mar 201817518961.222.79$11,240
Feb 2018022161.782.77$611
Jan 201817528062.874.01$12,125
Dec 201717228957.272.92$10,695
Nov 201717630155.423.12$10,693
Oct 2017033649.292.98$1,003
Sep 2017035547.523.09$1,096
Aug 201717131845.373.00$8,714
Jul 2017022543.873.09$695
Jun 2017173042.493.09$7,351
May 2017179045.373.26$8,121
Apr 20170047.933.21$0
Mar 2017023946.772.98$713
Feb 20170050.452.95$0
Jan 2017170049.413.42$8,400
Dec 2016172048.763.72$8,387
Nov 20160042.492.64$0
Oct 2016163046.193.09$7,529
Sep 2016171041.553.10$7,105
Aug 2016173041.442.92$7,169
Jul 2016173041.622.92$7,200
Jun 2016167045.352.69$7,573
May 20160042.521.99$0
Apr 2016180036.561.99$6,581
Mar 20160033.011.79$0
Feb 20160026.472.06$0
Jan 201606227.352.36$147
Dec 2015022632.362.00$452
Nov 2015033138.792.17$717
Oct 2015050043.552.43$1,213
Sep 201518150442.992.76$9,171
Aug 201517848940.162.87$8,553
Jul 2015084648.152.95$2,492
Jun 20150056.152.88$0
May 201518145755.212.96$11,344
Apr 201517063149.822.71$10,177
Mar 2015057542.892.93$1,687
Feb 201518347344.662.98$9,581
Jan 2015052543.433.10$1,628
Dec 20143611,25054.693.59$24,232
Nov 20141811,33070.464.25$18,408
Oct 20143591,41378.303.90$33,622
Sep 20141811,53686.164.05$21,809
Aug 20143562,03889.394.04$40,046
Jul 20141782,13196.564.18$26,094
Jun 20143501,06298.164.74$39,387
May 201416371694.734.73$18,825
Apr 20143441,82095.944.81$41,756
Mar 20141722,10395.895.06$27,128
Feb 201435897197.406.19$40,882
Jan 20141791,23990.404.86$22,204
Dec 20133661,17291.824.35$38,710
Nov 201317922288.853.74$16,734
Oct 20133607,55697.423.78$63,628
Sep 20131752,243104.113.72$26,558
Aug 20133562,333104.253.52$45,331
Jul 20131713,326102.523.72$29,896
Jun 20133501,79894.403.93$40,112
May 20131711,59494.834.15$22,830
Apr 20133601,70793.964.28$41,136
Mar 20132671,68593.623.91$31,590
Feb 20133641,25091.233.42$37,483
Jan 20131821,11591.603.42$20,484
Dec 20125331,55586.773.42$51,567
Nov 20123611,13186.953.62$35,489
Oct 201201,17389.383.40$3,988
Sep 20123551,15994.672.92$36,990
Aug 20123681,45592.662.91$38,330
Jul 20121801,36785.133.02$19,453
Jun 20123631,45679.822.52$32,642
May 201235532991.612.49$33,340
Apr 20121790101.652.00$18,195
Mar 20121811,086105.052.22$21,427
Feb 20123511,309101.102.57$38,851
Jan 20123251,68598.092.73$36,486
Dec 20111841,74396.873.24$23,471
Nov 20113671,78295.723.31$41,030
Oct 20111821,99584.983.65$22,745
Sep 20113632,06783.623.99$38,593
Aug 20113592,36183.404.15$39,737
Jul 20111801,39894.144.52$23,260
Jun 20115131,99492.904.64$56,910
May 20111811,74498.134.40$25,444
Apr 20111811,502105.964.33$25,687
Mar 201114970396.364.06$17,210
Feb 201117427085.644.18$16,030
Jan 201107786.504.59$353
Dec 2010034785.734.35$1,509
Nov 201005380.843.80$201
Oct 2010027778.103.51$972
Sep 201006772.633.98$267
Aug 201008173.684.42$358
Jul 2010013272.554.74$625
Jun 201017878470.364.91$16,374
May 20101681,28171.124.24$17,373
Apr 201001,76481.694.12$7,272
Mar 20101751,93378.394.39$22,202
Feb 20101832,53973.585.44$27,283
Jan 20101803,02774.365.96$31,438
Dec 200902,00771.445.48$11,006
Nov 20091772,90374.593.75$24,093
Oct 200902072.544.11$82
Sep 200907965.543.06$242
Aug 20091792,49667.423.22$20,102
Jul 200902,90861.133.46$10,075
Jun 20091802,70466.163.90$22,441
May 20091792,43254.743.93$19,346
Apr 200902,14446.773.59$7,692
Mar 20091832,69442.144.06$18,647
Feb 20091762,18932.814.63$15,916
Jan 20091842,27835.865.37$18,833
Dec 200802,64037.105.98$15,780
Nov 20081813,58855.496.86$34,659
Oct 20081832,76175.246.92$32,881
Sep 200802,734101.767.88$21,536
Aug 20081642,950114.228.48$43,757
Jul 20081792,796131.0811.39$55,308
Jun 200803,005131.3313.03$39,163
May 20081803,136123.1711.57$58,468
Apr 20081823,687110.3110.45$58,623
Mar 20081801,432101.909.66$32,181
Feb 200801,60592.538.77$14,077
Jan 20081841,97190.388.21$32,803
Dec 20071834,00688.337.30$45,416
Nov 200704,13491.677.29$30,144
Oct 20073543,01182.856.92$50,171
Sep 2007057275.846.24$3,572
Aug 20070069.066.39$0
Jul 200702,22570.906.39$14,213
Jun 20071782,82162.007.55$32,330
May 20071812,34358.747.85$29,016
Apr 20071805,03359.617.81$50,013
Mar 20071841,57556.927.30$21,974
Feb 200701,34655.108.22$11,059
Jan 20071831,88450.306.73$21,878
Dec 20061821,94556.656.92$23,767
Nov 20061812,03754.207.62$25,327
Oct 2006180054.906.01$9,882
Sep 200602,09260.085.04$10,538
Aug 20061791,65668.717.34$24,454
Jul 200601,67969.376.34$10,649
Jun 20061821,44566.286.38$21,288
May 20061802,19266.016.42$25,965
Apr 20061852,08964.397.36$27,288
Mar 200602,48056.707.08$17,566
Feb 20061822,24057.597.75$27,844
Jan 20061822,48060.598.93$33,182
Dec 20051822,48054.9413.42$43,269
Nov 20051801,99554.6910.59$30,968
Oct 20051792,01558.3413.80$38,241
Sep 200501,75561.4512.08$21,199
Aug 20051812,01561.519.80$30,874
Jul 20051802,01555.697.84$25,829
Jun 20051811,95052.337.38$23,865
May 20051782,01545.226.65$21,451
Apr 20051832,01549.207.36$23,835
Mar 20051831,78550.377.15$21,989
Feb 20051831,54045.226.31$17,996
Jan 200501,71943.166.32$10,868
Dec 20041821,74939.866.75$19,062
Nov 20041851,68645.286.33$19,050
Oct 20041701,82849.706.52$20,359
Sep 20041821,88343.245.28$17,819
Aug 20041812,19542.375.55$19,853
Jul 2004521,22238.286.08$9,425
Jun 20043533,08636.106.43$32,596
May 20041733,31837.486.49$28,033
Apr 20041711,90034.475.86$17,025
Mar 20041582,53934.365.53$19,470
Feb 20043482,69332.455.51$26,130
Jan 20041693,82132.036.30$29,484
Dec 200303,88130.266.30$24,457
Nov 200303,72028.804.60$17,094
Oct 20031403,88728.174.76$22,445
Sep 200303,79026.314.75$18,000
Aug 20031432,97929.765.13$19,537
Jul 20031302,91329.415.17$18,886
Jun 20031474,24128.565.98$29,572
May 200303,59626.595.97$21,478
Apr 20031803,48026.675.41$23,618
Mar 20031803,65931.146.10$27,911
Feb 20031534,06233.487.93$37,317
Jan 20031784,24230.315.58$29,074
Dec 20021594,76226.914.85$27,392
Nov 20021664,44324.664.14$22,474
Oct 20021485,31326.464.23$26,385
Sep 20021265,80727.443.64$24,567
Aug 20021434,26725.963.16$17,214
Jul 200202,18224.583.06$6,681
Jun 20023125,76123.733.34$26,635
May 20023076,94324.663.58$32,454
Apr 20022937,26023.653.51$32,429
Mar 20023146,98422.003.10$28,577
Feb 20023006,84018.222.38$21,716
Jan 20023017,28917.172.38$22,485
Dec 20015867,35016.932.36$27,299
Nov 20014687,20718.072.41$25,793
Oct 20013167,29219.782.53$24,691
Sep 20014946,94224.262.25$27,613
Aug 20014847,79924.873.05$35,849
Jul 20014528,61823.933.20$38,369
Jun 20014818,67124.563.82$44,973
May 20016359,23925.524.31$56,001
Apr 200166210,12924.685.34$70,380
Mar 200166910,70224.545.38$73,956
Feb 200168310,90127.755.77$81,820
Jan 200186110,91127.478.40$115,291
Dec 200069915,84126.889.12$163,299
Nov 20006909,35232.215.66$75,139
Oct 20006958,70031.235.15$66,471
Sep 200085410,12331.875.19$79,720
Aug 20006939,73829.644.54$64,758
Jul 200087011,03828.534.09$69,964
Jun 200086310,73329.304.40$72,482
May 20001,04512,27427.263.68$73,652
Apr 20001,00612,02024.513.12$62,111
Mar 20001,01213,09128.422.86$66,198
Feb 20001,01913,53827.622.73$65,056
Jan 20001,19814,45225.272.48$66,122
Dec 19991,19014,60324.282.42$64,287
Nov 19991,42824,07923.192.43$91,723
Oct 19991,46817,02620.982.80$78,535
Sep 19991,29415,56321.752.62$68,902
Aug 19991,46015,62719.262.88$73,057
Jul 19991,64017,84017.892.37$71,663
Jun 19991,65117,96115.942.36$68,743
May 19991,89919,75315.792.32$75,832
Apr 19992,25116,36215.102.21$70,118
Mar 19992,74419,93312.471.84$70,861
Feb 19992,51416,3269.981.82$54,767
Jan 19992738,78410.381.90$19,523
Dec 19983308,1309.201.77$17,453
Nov 19983108,19710.892.19$21,292
Oct 19983199,04812.421.97$21,779
Sep 19983299,15612.592.08$23,211
Aug 19983567,26611.301.91$17,882
Jul 19984017,77511.742.24$22,103
Jun 19983414,96811.242.24$14,948
May 19981302,29812.622.21$6,711
Apr 19984267113.042.51$2,229
Mar 199808012.802.31$185

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                  113 bbl  × $106.41 =    $12,024
Casinghead gas         0 Mcf  × $  3.05 =         $0

────────────────────────────────────────────────────
Month total                                  $12,024

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. 04/O/12778 is the state's own key, not one this site invented.