BLOCK 31 UNIT

Operated by HILCORP ENERGY COMPANY (P-5 386310) in the BLOCK 31 (ELLENBURGER) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 445District 08Field 09358540Hydrogen sulphide fieldOilCasinghead gasSaveExport
Value, all time
$24.2 M
Jan 1993 – May 2026
Value, last 12 filed months
$812 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 2 leases and 15 wells, and the rule below applies to all of them.

Discovered
1945-11-07
as the register files it
Field class
Oil
the register's own label
Between wells
no field rule filed
From a lease line
no field rule filed

The register flags this field for hydrogen sulphide. That is a poisonous gas that occurs naturally in some formations. The flag is a property of the field as the Commission records it. It is not a measurement taken at this lease, and it is not a statement that gas is escaping anywhere.

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
OilDisposition477,248 bbl$22,264,939
Casinghead gasProduction588,966 Mcf$1,919,354
Total$24,184,293

3,518 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 (14)

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 31.4425, -102.4606. A lease has no coordinate of its own — that point is the mean of its wells, and they span 1.3 miles. 2 wells have no surveyed location and are left out of it.

31.44504, -102.46119 · centre of 12 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%
14 of 14 wells
With a plug date
14.3%
2 of 14 wells
Median depth
10,396 ft
12 wells filed one
Completion to plug
30.9 years
median over 1 well

What the state filed about each well

On the RRC proration schedule
14100.0%
A plug date is filed
214.3%
BothOn the schedule and plugged. Neither fact cancels the other.
214.3%
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

Total depth in feet, 12 of 14 wells. Median 10,396 ft, with the middle half between 10,339 and 10,447 ft; the shallowest is 10,295 ft and the deepest 10,831 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 14 wells, Nov 1983 – Apr 2013. This is the LAST completion filed on each wellbore, not the first — a well recompleted in 2019 counts once, in the 2010s.

Completions filed
Nov 1983 – Apr 2013
10 of 14 wells; 4 filed none
Plug dates filed
Apr 2003 – Oct 2022
2 of 14 wells; 12 filed none

Last completion to plug: a median of 30.9 years across the 1 well that filed both dates, with the middle half between 30.9 years and 30.9 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

14 wells

42-10303071B 2 L10,450 ftApr 2003Yes
42-10304684P 1 L10,440 ftYes
42-10380169F 1 TYes
42-10380170Z 2 TYes
42-10333144B 710,335 ftApr 2013Yes
42-10333112B 6L10,340 ftMay 2008Yes
42-10335082710,831 ftJan 2008Yes
42-10333440E 8L10,375 ftJul 1999Yes
42-10310644A 3 L10,333 ftOct 1995Yes
42-10303040A 1 T10,458 ftNov 1991Oct 2022Yes
42-10303050F 2 T10,446 ftJun 1991Yes
42-10303043E 310,416 ftNov 1986Yes
42-10332966B 510,295 ftOct 1986Yes
42-10333272P 5KL10,340 ftNov 1983Yes

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 2026902106.413.05$9,583
Apr 20268661,99698.932.87$91,401
Mar 20261,4673,14189.753.15$141,556
Feb 20261,4322,21363.503.75$99,231
Jan 20266331,23159.138.00$47,275
Dec 20251,1522,42056.664.41$75,953
Nov 20257211,96258.593.93$49,947
Oct 20258541,81359.383.30$56,702
Sep 20258951,97362.743.08$62,223
Aug 20258211,52163.933.01$57,072
Jul 20258481,82166.743.32$62,633
Jun 20257951,68166.483.13$58,111
May 20258381,19560.553.23$54,604
Apr 20251,0281,63862.363.54$69,910
Mar 20251,15075867.704.27$81,090
Feb 20251,0341,78070.884.34$81,017
Jan 20251,1551,53574.324.28$92,407
Dec 20241,2451,61468.993.12$90,930
Nov 20241,1282,41069.052.20$83,187
Oct 20241,2121,44371.372.28$89,793
Sep 20241,12897269.612.36$80,818
Aug 20241,1582,02275.632.06$91,752
Jul 20241,0572,04979.932.15$88,884
Jun 20241,04048978.082.63$82,491
May 20241,11979978.812.20$89,945
Apr 20249822,55984.451.66$87,176
Mar 20241,0483,16380.301.55$89,042
Feb 20248912,94876.091.78$73,054
Jan 20249792,71073.023.30$80,423
Dec 20238162,05171.262.61$63,503
Nov 20239012,84677.892.81$78,169
Oct 20231,0722,89385.443.09$100,523
Sep 20231,0263,00089.042.74$99,560
Aug 20231,4132,46180.522.67$120,353
Jul 20237151,80774.852.64$58,291
Jun 20231,2983,27568.962.26$96,907
May 20239624,48970.622.23$77,935
Apr 20231,0924,35778.122.24$95,057
Mar 20231,1835,02672.852.39$98,210
Feb 20231,0113,52675.112.47$84,630
Jan 20231,1663,06176.533.39$99,604
Dec 20221,1553,21576.415.73$106,673
Nov 20221,1374,46285.005.65$121,838
Oct 20221,0975,41887.185.86$127,406
Sep 20221,2124,05084.888.16$135,937
Aug 20221,5684,84594.529.13$192,428
Jul 20221,4066,599101.587.54$192,592
Jun 2022234895115.097.98$34,071
May 20229004,985109.378.43$140,472
Apr 20228574,680104.226.84$121,317
Mar 20229660108.885.08$105,178
Feb 20228503,49591.054.86$94,374
Jan 20228663,93481.844.54$88,725
Dec 20219468,86471.323.90$102,031
Nov 20219534,20977.435.24$95,833
Oct 20219144,56779.795.71$99,023
Sep 20218104,53569.865.35$80,853
Aug 20211,0264,31666.024.22$85,953
Jul 20218063,42370.783.98$70,679
Jun 20219404,00569.493.38$78,860
May 20211,1958,45163.483.02$101,361
Apr 20211,35119,03660.362.76$134,056
Mar 20211,0797,89261.302.72$87,585
Feb 20213872,72657.805.55$37,492
Jan 20219944,67050.412.81$63,232
Dec 20209644,88844.642.68$56,111
Nov 20201,0675,97138.772.71$57,529
Oct 20201,0106,44536.972.48$53,313
Sep 20209586,61637.091.99$48,705
Aug 20201,0667,11439.982.39$59,586
Jul 20201,1125,25038.371.83$52,249
Jun 20201,0247,34434.901.69$48,151
May 20209847,16316.921.81$29,648
Apr 20201,0647,68614.751.80$29,562
Mar 20201,0298,01730.341.86$46,101
Feb 20209797,71949.881.98$64,121
Jan 20201,0438,45657.252.09$77,425
Dec 20191,0603,00359.012.30$69,471
Nov 20191,0467,87155.302.75$79,495
Oct 20191,0439,12653.472.42$77,841
Sep 20191,0007,94655.052.66$76,165
Aug 20191,2008,40453.112.30$83,098
Jul 20191,0468,27156.272.46$79,206
Jun 20191,0357,65052.782.49$73,685
May 20191,0597,65558.482.74$82,907
Apr 20191,1076,96462.632.75$88,487
Mar 20191,1206,81156.803.06$84,472
Feb 20199856,62950.852.79$68,597
Jan 20191,0687,16546.033.23$72,290
Dec 20181,0457,51746.594.19$80,149
Nov 20181,0507,20652.934.24$86,110
Oct 20189403,02661.443.40$68,036
Sep 20181,1523,03959.543.11$78,035
Aug 20187702,14959.403.07$52,328
Jul 20189702,93765.142.93$71,797
Jun 20181,1783,18560.183.08$80,692
May 20181,1523,18865.382.90$84,566
Apr 20181,2863,13363.842.90$91,186
Mar 20181,1972,75561.222.79$80,958
Feb 20189742,89261.782.77$68,173
Jan 20181,0493,50462.874.01$79,999
Dec 20171,2883,35957.272.92$83,577
Nov 20171,2233,07655.423.12$77,371
Oct 20177702,90449.292.98$46,618
Sep 20175262,77447.523.09$33,560
Aug 20175682,38445.373.00$32,933
Jul 20175222,76043.873.09$31,421
Jun 20174792,56842.493.09$28,281
May 20175762,74045.373.26$35,075
Apr 20175692,67047.933.21$35,847
Mar 20175382,61546.772.98$32,965
Feb 20174932,13350.452.95$31,170
Jan 20176032,60549.413.42$38,700
Dec 20166832,49048.763.72$42,573
Nov 20166572,42142.492.64$34,318
Oct 20168042,32846.193.09$44,331
Sep 20165192,64841.553.10$29,775
Aug 20166881,89641.442.92$34,055
Jul 20166171,73141.622.92$30,742
Jun 20165351,53045.352.69$28,372
May 20165761,40842.521.99$27,295
Apr 20165911,69536.561.99$24,982
Mar 201656576333.011.79$20,019
Feb 20165251,12626.472.06$16,220
Jan 20166461,86327.352.36$22,073
Dec 20156931,86532.362.00$26,158
Nov 20157261,79838.792.17$32,058
Oct 20157891,74043.552.43$38,583
Sep 20157011,23242.992.76$33,534
Aug 201577795740.162.87$33,953
Jul 20159191,17748.152.95$47,716
Jun 20158251,02756.152.88$49,284
May 20159311,05655.212.96$54,521
Apr 201593975149.822.71$48,814
Mar 201574377242.892.93$34,133
Feb 20159331,19844.662.98$45,233
Jan 20159371,13243.433.10$44,204
Dec 201474770054.693.59$43,367
Nov 201470677470.464.25$53,036
Oct 201476669978.303.90$62,705
Sep 201490768586.164.05$80,918
Aug 201494350689.394.04$86,337
Jul 20141,30639596.564.18$127,758
Jun 20141,29811398.164.74$127,947
May 20141,67520994.734.73$159,661
Apr 20141,59119795.944.81$153,588
Mar 20141,09515395.895.06$105,773
Feb 201424312497.406.19$24,436
Jan 20141,13813490.404.86$103,527
Dec 20131,35510791.824.35$124,882
Nov 20131,45616688.853.74$129,986
Oct 20131,50629897.423.78$147,841
Sep 20131,4995,162104.113.72$175,252
Aug 20131,3814,931104.253.52$161,339
Jul 20131,166112102.523.72$119,955
Jun 20131,10811994.403.93$105,063
May 20131,18711294.834.15$113,028
Apr 20131,1304,83393.964.28$126,873
Mar 20131,1264,95893.623.91$124,816
Feb 20131,0512,89791.233.42$105,790
Jan 20131,1912,91891.603.42$119,075
Dec 20121,1833,07186.773.42$113,152
Nov 20121,2115,02986.953.62$123,526
Oct 20121,1391,95989.383.40$108,464
Sep 20121,08431394.672.92$103,536
Aug 20121,19332692.662.91$111,491
Jul 20121,20434585.133.02$103,539
Jun 20121,57233179.822.52$126,311
May 20129012,92191.612.49$89,809
Apr 20121,097647101.652.00$112,802
Mar 20121,0135,027105.052.22$117,586
Feb 20121,0663,230101.102.57$116,074
Jan 20121,0604,09598.092.73$115,171
Dec 20111,1452,44096.873.24$118,821
Nov 20111,1622,35795.723.31$119,031
Oct 20111,2052,63284.983.65$112,004
Sep 20111,1702,71683.623.99$108,661
Aug 20111,1132,78783.404.15$104,388
Jul 20111,0552,17494.144.52$109,138
Jun 20111,15827592.904.64$108,854
May 20111,09924398.134.40$108,915
Apr 201190457105.964.33$96,035
Mar 20115853696.364.06$56,517
Feb 20118535285.644.18$73,268
Jan 20118995586.504.59$78,016
Dec 20109175685.734.35$78,858
Nov 20109565680.843.80$77,496
Oct 20108312078.103.51$64,971
Sep 20108102072.633.98$58,910
Aug 20109922073.684.42$73,179
Jul 20101,09510872.554.74$79,954
Jun 20101,15111970.364.91$81,569
May 201088412471.124.24$63,395
Apr 20104511781.694.12$36,912
Mar 20105252178.394.39$41,247
Feb 2010496073.585.44$36,496
Jan 2010598074.365.96$44,467
Dec 2009709071.445.48$50,651
Nov 20091,047074.593.75$78,096
Oct 20091,102072.544.11$79,939
Sep 20091,173065.543.06$76,878
Aug 20091,091067.423.22$73,555
Jul 2009461061.133.46$28,181
Jun 2009220066.163.90$14,555
May 200921054.743.93$1,150
Apr 2009184046.773.59$8,606
Mar 2009276042.144.06$11,631
Feb 2009342032.814.63$11,221
Jan 2009780035.865.37$27,971
Dec 2008907037.105.98$33,650
Nov 2008817055.496.86$45,335
Oct 2008664075.246.92$49,959
Sep 20087770101.767.88$79,068
Aug 20089470114.228.48$108,166
Jul 20081,0370131.0811.39$135,930
Jun 20089870131.3313.03$129,623
May 20081,0170123.1711.57$125,264
Apr 20089650110.3110.45$106,449
Mar 20087650101.909.66$77,954
Feb 2008617092.538.77$57,091
Jan 2008877090.388.21$79,263
Dec 2007907088.337.30$80,115
Nov 2007743091.677.29$68,111
Oct 2007960082.856.92$79,536
Sep 2007794075.846.24$60,217
Aug 2007742069.066.39$51,243
Jul 2007819070.906.39$58,067
Jun 2007939062.007.55$58,218
May 2007971058.747.85$57,037
Apr 2007910059.617.81$54,245
Mar 2007550056.927.30$31,306
Feb 20071,672055.108.22$92,127
Jan 20071,947050.306.73$97,934
Dec 20061,840056.656.92$104,236
Nov 20062,018054.207.62$109,376
Oct 20062,256054.906.01$123,854
Sep 20062,390060.085.04$143,591
Aug 20062068.717.34$137
Jul 200672069.376.34$4,995
Jun 2006787066.286.38$52,162
May 20062,045066.016.42$134,990
Apr 20061,165064.397.36$75,014
Mar 20061,148056.707.08$65,092
Feb 20061,145057.597.75$65,941
Jan 20061,236060.598.93$74,889
Dec 20051,291054.9413.42$70,928
Nov 20051,261054.6910.59$68,964
Oct 20051,804058.3413.80$105,245
Sep 2005984061.4512.08$60,467
Aug 20051,267061.519.80$77,933
Jul 2005659055.697.84$36,700
Jun 20051,136052.337.38$59,447
May 20051,246045.226.65$56,344
Apr 20051,181049.207.36$58,105
Mar 20051,228050.377.15$61,854
Feb 20051,282045.226.31$57,972
Jan 20051,342043.166.32$57,921
Dec 20041,002039.866.75$39,940
Nov 20041,158045.286.33$52,434
Oct 20041,277049.706.52$63,467
Sep 20041,236043.245.28$53,445
Aug 20041,296042.375.55$54,912
Jul 20041,290038.286.08$49,381
Jun 20041,090036.106.43$39,349
May 2004988037.486.49$37,030
Apr 2004573034.475.86$19,751
Mar 2004605034.365.53$20,788
Feb 20042,150032.455.51$69,768
Jan 20041,252032.036.30$40,102
Dec 2003840030.266.30$25,418
Nov 2003779028.804.60$22,435
Oct 20031,150028.174.76$32,396
Sep 2003822026.314.75$21,627
Aug 2003856029.765.13$25,475
Jul 2003767029.415.17$22,557
Jun 2003574028.565.98$16,393
May 2003814026.595.97$21,644
Apr 2003807026.675.41$21,523
Mar 20031,147031.146.10$35,718
Feb 20031,002033.487.93$33,547
Jan 2003743030.315.58$22,520
Dec 200240184126.914.85$14,873
Nov 200241084524.664.14$13,606
Oct 20024113,00126.464.23$23,567
Sep 2002613327.443.64$16,832
Aug 2002675025.963.16$17,523
Jul 20025601724.583.06$13,817
Jun 20025847423.733.34$14,105
May 200263818024.663.58$16,378
Apr 200262731523.653.51$15,935
Mar 200251732122.003.10$12,370
Feb 200248658818.222.38$10,252
Jan 200256136017.172.38$10,488
Dec 200169952616.932.36$13,078
Nov 200167135918.072.41$12,989
Oct 20016666719.782.53$13,343
Sep 20016501324.262.25$15,798
Aug 2001641024.873.05$15,942
Jul 2001620023.933.20$14,837
Jun 2001635024.563.82$15,596
May 2001648025.524.31$16,537
Apr 20010024.685.34$0
Mar 20011024.545.38$25
Feb 2001541327.755.77$1,573
Jan 20015863027.478.40$16,349
Dec 20005773026.889.12$15,783
Nov 20008043532.215.66$26,095
Oct 20007654131.235.15$24,102
Sep 20006442331.875.19$20,644
Aug 20006322229.644.54$18,832
Jul 2000578728.534.09$16,519
Jun 2000358829.304.40$10,525
May 20002,0006727.263.68$54,767
Apr 20003,88917924.513.12$95,877
Mar 20004,16728428.422.86$119,238
Feb 20004,71228027.622.73$130,909
Jan 20002,99319925.272.48$76,127
Dec 19992,50919224.282.42$61,384
Nov 19992,25915123.192.43$52,754
Oct 19992,36812720.982.80$50,037
Sep 19993,33819021.752.62$73,099
Aug 19993,24718219.262.88$63,061
Jul 19993,98612117.892.37$71,597
Jun 19993,7094715.942.36$59,232
May 19993,2499515.792.32$51,522
Apr 19992,3727115.102.21$35,974
Mar 19992,5226912.471.84$31,576
Feb 19992,185719.981.82$21,935
Jan 19992,0437110.381.90$21,341
Dec 19982,1821299.201.77$20,303
Nov 19981,9579810.892.19$21,526
Oct 19981,9576912.421.97$24,442
Sep 19982,3797812.592.08$30,114
Aug 19982,6818011.301.91$30,448
Jul 19982,46511011.742.24$29,185
Jun 19981,8739311.242.24$21,261
May 19981,0044712.622.21$12,774
Apr 19982,04510813.042.51$26,937
Mar 19982,98616712.802.31$38,606
Feb 19981,8419313.952.30$25,896
Jan 19981,8829914.702.15$27,879
Dec 19972,66510816.322.41$43,753
Nov 19972,80113618.193.09$51,370
Oct 19972,77512519.253.15$53,812
Sep 19972,22112117.742.95$39,758
Aug 19971,9448517.862.55$34,937
Jul 19972,37010917.582.25$41,910
Jun 19972,65013717.242.26$45,995
May 19972,0894818.972.31$39,739
Apr 19972,06911817.882.08$37,239
Mar 19972,28414518.951.94$43,563
Feb 19971,96212620.492.21$40,479
Jan 19972,42411423.483.54$57,319
Dec 19962,91116623.32$67,885
Nov 19963,21516621.97$70,634
Oct 19962,84911723.31$66,410
Sep 19962,84013022.22$63,105
Aug 19963,19314020.26$64,690
Jul 19963,28214919.55$64,163
Jun 19962,66211118.73$49,859
May 19963,45614519.43$67,150
Apr 19963,2495721.51$69,886
Mar 19964,1219819.38$79,865
Feb 19964,5347516.98$76,987
Jan 19961,1493117.07$19,613
Dec 19951,2303817.19$21,144
Nov 19951,1543216.00$18,464
Oct 19951,3912815.43$21,463
Sep 19952,6154816.18$42,311
Aug 19951,4601515.92$23,243
Jul 19951,1421215.24$17,404
Jun 1995725816.41$11,897
May 19951,1441417.56$20,089
Apr 19951,0032017.73$17,783
Mar 19951,0162416.44$16,703
Feb 19958591916.58$14,242
Jan 19951,3024415.92$20,728
Dec 19941,0071315.03$15,135
Nov 19941,0282015.90$16,345
Oct 19947191715.58$11,202
Sep 19944511115.29$6,896
Aug 19945231216.13$8,436
Jul 19944992217.56$8,762
Jun 19947112817.09$12,151
May 19941,5855915.88$25,170
Apr 19941,4163514.14$20,022
Mar 19942,1656512.46$26,976
Feb 19942,0125612.50$25,150
Jan 19942,11812512.66$26,814
Dec 19931,45011512.33$17,879
Nov 19931,0395714.49$15,055
Oct 19931,1035015.85$17,483
Sep 19931,0363015.03$15,571
Aug 19931,0911715.66$17,085
Jul 19931,0201915.46$15,769
Jun 19939721216.79$16,320
May 19931,0401917.68$18,387
Apr 19939941818.05$17,942
Mar 19939174718.14$16,634
Feb 199373836617.90$13,210
Jan 199388261816.93$14,932

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                   90 bbl  × $106.41 =     $9,577
Casinghead gas         2 Mcf  × $  3.05 =         $6

────────────────────────────────────────────────────
Month total                                   $9,583

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. 08/O/445 is the state's own key, not one this site invented.