DUVAL CO. RANCH CO. -A-

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

Oil lease lease 423District 04Field 16126001OilCasinghead gasSaveExport
Value, all time
$8.2 M
Jan 1993 – May 2026
Value, last 12 filed months
$183 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 14 leases and 98 wells, and the rule below applies to all of them.

Discovered
1939-04-06
as the register files it
Field class
Oil
the register's own label
Between wells
660 ft
minimum
From a lease line
330 ft
minimum

A drilling unit in this field needs at least 40 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
OilDisposition159,282 bbl$8,174,079
Casinghead gasProduction111 Mcf$194
Total$8,174,273

48 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 (10)

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 27.9659, -98.7145. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.4 miles.

27.96621, -98.71444 · 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
70.0%
7 of 10 wells
With a plug date
60.0%
6 of 10 wells
Median depth
1,120 ft
9 wells filed one
Completion to plug
35.3 years
median over 1 well

What the state filed about each well

On the RRC proration schedule
770.0%
A plug date is filed
660.0%
BothOn the schedule and plugged. Neither fact cancels the other.
660.0%
NeitherNo plug date, and not on the schedule.
330.0%

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, 9 of 10 wells. Median 1,120 ft, with the middle half between 1,102 and 1,162 ft; the shallowest is 1,060 ft and the deepest 1,300 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, 4 of 10 wells, Dec 1941 – Oct 2006. This is the LAST completion filed on each wellbore, not the first — a well recompleted in 2019 counts once, in the 2010s.

Completions filed
Dec 1941 – Oct 2006
4 of 10 wells; 6 filed none
Plug dates filed
Oct 1983 – Jun 2013
6 of 10 wells; 4 filed none

Last completion to plug: a median of 35.3 years across the 1 well that filed both dates, with the middle half between 35.3 years and 35.3 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

10 wells

42-1310454851,162 ftOct 1983Yes
42-1310454971,060 ftOct 1983Yes
42-1310455081,120 ftOct 1983Yes
42-1310469521,102 ftJun 2013Yes
42-1310469741,063 ftOct 1983Yes
42-131045626
42-131389054R1,300 ftOct 2006
42-131381702R1,175 ftMay 1997
42-1310469631,102 ftJun 1964Sep 1999Yes
42-1310469411,162 ftDec 1941Yes

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 20261510106.413.05$16,068
Apr 2026160098.932.87$15,829
Mar 2026322089.753.15$28,900
Feb 2026156063.503.75$9,906
Jan 2026163059.138.00$9,638
Dec 2025229056.664.41$12,975
Nov 2025161058.593.93$9,433
Oct 2025162059.383.30$9,620
Sep 2025289062.743.08$18,132
Aug 2025161063.933.01$10,293
Jul 2025480066.743.32$32,035
Jun 2025160066.483.13$10,637
May 2025314060.553.23$19,013
Apr 2025321062.363.54$20,018
Mar 2025475067.704.27$32,158
Feb 2025155070.884.34$10,986
Jan 2025315074.324.28$23,411
Dec 2024159068.993.12$10,969
Nov 2024315069.052.20$21,751
Oct 2024295071.372.28$21,054
Sep 2024309069.612.36$21,509
Aug 2024479075.632.06$36,227
Jul 2024310079.932.15$24,778
Jun 2024315078.082.63$24,595
May 2024318078.812.20$25,062
Apr 2024308084.451.66$26,011
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 2023134074.852.64$10,030
Jun 20230068.962.26$0
May 2023316070.622.23$22,316
Apr 2023316078.122.24$24,686
Mar 2023627072.852.39$45,677
Feb 2023160075.112.47$12,018
Jan 2023481076.533.39$36,811
Dec 2022617076.415.73$47,145
Nov 2022154085.005.65$13,090
Oct 2022474087.185.86$41,323
Sep 2022314084.888.16$26,652
Aug 2022318094.529.13$30,057
Jul 20224670101.587.54$47,438
Jun 20221560115.097.98$17,954
May 20223140109.378.43$34,342
Apr 20223150104.226.84$32,829
Mar 20224730108.885.08$51,500
Feb 2022311091.054.86$28,317
Jan 2022322081.844.54$26,352
Dec 2021311071.323.90$22,181
Nov 2021161077.435.24$12,466
Oct 2021162079.795.71$12,926
Sep 2021312069.865.35$21,796
Aug 2021154066.024.22$10,167
Jul 2021310070.783.98$21,942
Jun 2021312069.493.38$21,681
May 2021159063.483.02$10,093
Apr 2021158060.362.76$9,537
Mar 2021478061.302.72$29,301
Feb 2021156057.805.55$9,017
Jan 2021316050.412.81$15,930
Dec 2020312044.642.68$13,928
Nov 2020311038.772.71$12,057
Oct 2020315036.972.48$11,646
Sep 2020315037.091.99$11,683
Aug 2020471039.982.39$18,831
Jul 2020316038.371.83$12,125
Jun 2020323034.901.69$11,273
May 2020315016.921.81$5,330
Apr 2020314014.751.80$4,632
Mar 2020313030.341.86$9,496
Feb 2020473049.881.98$23,593
Jan 2020325057.252.09$18,606
Dec 2019319059.012.30$18,824
Nov 2019467055.302.75$25,825
Oct 2019313053.472.42$16,736
Sep 2019322055.052.66$17,726
Aug 2019322053.112.30$17,101
Jul 2019316056.272.46$17,781
Jun 2019317052.782.49$16,731
May 2019307058.482.74$17,953
Apr 2019159062.632.75$9,958
Mar 2019479056.803.06$27,207
Feb 2019318050.852.79$16,170
Jan 2019321046.033.23$14,776
Dec 2018480046.594.19$22,363
Nov 2018160052.934.24$8,469
Oct 2018480061.443.40$29,491
Sep 2018468059.543.11$27,865
Aug 2018316059.403.07$18,770
Jul 2018317065.142.93$20,649
Jun 2018472060.183.08$28,405
May 2018312065.382.90$20,399
Apr 2018477063.842.90$30,452
Mar 2018323061.222.79$19,774
Feb 2018321061.782.77$19,831
Jan 2018326062.874.01$20,496
Dec 2017497057.272.92$28,463
Nov 2017326055.423.12$18,067
Oct 2017479049.292.98$23,610
Sep 2017321047.523.09$15,254
Aug 2017499045.373.00$22,640
Jul 2017325043.873.09$14,258
Jun 2017331042.493.09$14,064
May 2017648045.373.26$29,400
Apr 2017311047.933.21$14,906
Mar 2017489046.772.98$22,871
Feb 2017492050.452.95$24,821
Jan 2017490049.413.42$24,211
Dec 2016653048.763.72$31,840
Nov 2016660042.492.64$28,043
Oct 2016706046.193.09$32,610
Sep 2016537041.553.10$22,312
Aug 2016520041.442.92$21,549
Jul 2016520041.622.92$21,642
Jun 2016358045.352.69$16,235
May 2016159042.521.99$6,761
Apr 2016170036.561.99$6,215
Mar 2016163033.011.79$5,381
Feb 2016515026.472.06$13,632
Jan 2016165027.352.36$4,513
Dec 2015499032.362.00$16,148
Nov 2015327038.792.17$12,684
Oct 2015330043.552.43$14,372
Sep 2015467042.992.76$20,076
Aug 2015323040.162.87$12,972
Jul 2015513048.152.95$24,701
Jun 2015330056.152.88$18,530
May 2015179055.212.96$9,883
Apr 2015500049.822.71$24,910
Mar 2015517042.892.93$22,174
Feb 2015359044.662.98$16,033
Jan 2015503043.433.10$21,845
Dec 2014528054.693.59$28,876
Nov 2014504070.464.25$35,512
Oct 2014339078.303.90$26,544
Sep 2014495086.164.05$42,649
Aug 2014515089.394.04$46,036
Jul 2014343096.564.18$33,120
Jun 2014519098.164.74$50,945
May 2014645094.734.73$61,101
Apr 2014682095.944.81$65,431
Mar 2014341095.895.06$32,698
Feb 2014511097.406.19$49,771
Jan 2014323090.404.86$29,199
Dec 2013519091.824.35$47,655
Nov 2013514088.853.74$45,669
Oct 2013340097.423.78$33,123
Sep 20135040104.113.72$52,471
Aug 20135130104.253.52$53,480
Jul 20136630102.523.72$67,971
Jun 2013342094.403.93$32,285
May 2013500094.834.15$47,415
Apr 2013349093.964.28$32,792
Mar 2013522093.623.91$48,870
Feb 2013514091.233.42$46,892
Jan 2013341091.603.42$31,236
Dec 2012328086.773.42$28,461
Nov 2012499086.953.62$43,388
Oct 2012331089.383.40$29,585
Sep 2012508094.672.92$48,092
Aug 2012338092.662.91$31,319
Jul 2012344085.133.02$29,285
Jun 2012665079.822.52$53,080
May 2012334091.612.49$30,598
Apr 20123480101.652.00$35,374
Mar 20125440105.052.22$57,147
Feb 20125190101.102.57$52,471
Jan 2012695098.092.73$68,173
Dec 2011338096.873.24$32,742
Nov 2011507095.723.31$48,530
Oct 2011356084.983.65$30,253
Sep 2011340083.623.99$28,431
Aug 2011650083.404.15$54,210
Jul 2011341094.144.52$32,102
Jun 2011514092.904.64$47,751
May 2011493098.134.40$48,378
Apr 20113390105.964.33$35,920
Mar 2011500096.364.06$48,180
Feb 2011348085.644.18$29,803
Jan 2011479086.504.59$41,434
Dec 2010338085.734.35$28,977
Nov 2010475080.843.80$38,399
Oct 2010320078.103.51$24,992
Sep 2010499072.633.98$36,242
Aug 2010470073.684.42$34,630
Jul 2010477072.554.74$34,606
Jun 2010500070.364.91$35,180
May 2010520071.124.24$36,982
Apr 2010352081.694.12$28,755
Mar 2010526078.394.39$41,233
Feb 2010342073.585.44$25,164
Jan 2010502074.365.96$37,329
Dec 2009347071.445.48$24,790
Nov 2009512074.593.75$38,190
Oct 2009349072.544.11$25,316
Sep 2009328065.543.06$21,497
Aug 2009339067.423.22$22,855
Jul 2009338061.133.46$20,662
Jun 2009523066.163.90$34,602
May 2009333054.743.93$18,228
Apr 2009346046.773.59$16,182
Mar 2009501042.144.06$21,112
Feb 2009354032.814.63$11,615
Jan 2009357035.865.37$12,802
Dec 2008523037.105.98$19,403
Nov 2008500055.496.86$27,745
Oct 2008360075.246.92$27,086
Sep 20085310101.767.88$54,035
Aug 20081830114.228.48$20,902
Jul 20085220131.0811.39$68,424
Jun 20083560131.3313.03$46,753
May 20085370123.1711.57$66,142
Apr 20084420110.3110.45$48,757
Mar 20083630101.909.66$36,990
Feb 2008494092.538.77$45,710
Jan 2008526090.388.21$47,540
Dec 2007317088.337.30$28,001
Nov 2007529091.677.29$48,493
Oct 2007368082.856.92$30,489
Sep 2007528075.846.24$40,044
Aug 2007541069.066.39$37,361
Jul 2007360070.906.39$25,524
Jun 2007523062.007.55$32,426
May 2007368058.747.85$21,616
Apr 2007557059.617.81$33,203
Mar 2007535056.927.30$30,452
Feb 2007730055.108.22$40,223
Jan 2007369050.306.73$18,561
Dec 2006544056.656.92$30,818
Nov 2006506054.207.62$27,425
Oct 2006547054.906.01$30,030
Sep 2006353060.085.04$21,208
Aug 2006352068.717.34$24,186
Jul 2006527069.376.34$36,558
Jun 2006522066.286.38$34,598
May 2006351066.016.42$23,170
Apr 2006522064.397.36$33,612
Mar 2006357056.707.08$20,242
Feb 2006527057.597.75$30,350
Jan 2006373060.598.93$22,600
Dec 2005526054.9413.42$28,898
Nov 2005702054.6910.59$38,392
Oct 2005182058.3413.80$10,618
Sep 2005527061.4512.08$32,384
Aug 2005721061.519.80$44,349
Jul 2005347055.697.84$19,324
Jun 2005370052.337.38$19,362
May 2005351045.226.65$15,872
Apr 2005555049.207.36$27,306
Mar 2005689050.377.15$34,705
Feb 2005364045.226.31$16,460
Jan 2005337043.166.32$14,545
Dec 2004524039.866.75$20,887
Nov 2004361045.286.33$16,346
Oct 2004530049.706.52$26,341
Sep 2004525043.245.28$22,701
Aug 2004531042.375.55$22,498
Jul 2004350038.286.08$13,398
Jun 2004512036.106.43$18,483
May 2004540037.486.49$20,239
Apr 2004503034.475.86$17,338
Mar 2004505034.365.53$17,352
Feb 2004159032.455.51$5,160
Jan 2004546032.036.30$17,488
Dec 2003703030.266.30$21,273
Nov 2003521028.804.60$15,005
Oct 2003847028.174.76$23,860
Sep 20030026.314.75$0
Aug 2003536029.765.13$15,951
Jul 2003681029.415.17$20,028
Jun 2003522028.565.98$14,908
May 2003570026.595.97$15,156
Apr 2003512026.675.41$13,655
Mar 2003863031.146.10$26,874
Feb 2003173033.487.93$5,792
Jan 2003506030.315.58$15,337
Dec 2002689026.914.85$18,541
Nov 2002512024.664.14$12,626
Oct 2002477026.464.23$12,621
Sep 2002327027.443.64$8,973
Aug 2002677025.963.16$17,575
Jul 2002493024.583.06$12,118
Jun 2002556023.733.34$13,194
May 2002688024.663.58$16,966
Apr 2002503023.653.51$11,896
Mar 2002470122.003.10$10,343
Feb 2002510118.222.38$9,295
Jan 2002674117.172.38$11,575
Dec 2001517116.932.36$8,755
Nov 2001346118.072.41$6,255
Oct 2001688119.782.53$13,611
Sep 2001691124.262.25$16,766
Aug 2001346124.873.05$8,608
Jul 2001512123.933.20$12,255
Jun 2001677124.563.82$16,631
May 2001516125.524.31$13,173
Apr 2001660124.685.34$16,294
Mar 2001524124.545.38$12,864
Feb 2001670127.755.77$18,598
Jan 2001490127.478.40$13,469
Dec 2000491126.889.12$13,207
Nov 2000503132.215.66$16,207
Oct 2000503131.235.15$15,714
Sep 2000667131.875.19$21,262
Aug 2000465129.644.54$13,787
Jul 2000496128.534.09$14,155
Jun 2000480129.304.40$14,068
May 2000503127.263.68$13,715
Apr 2000500124.513.12$12,258
Mar 2000524128.422.86$14,895
Feb 2000696127.622.73$19,226
Jan 2000346125.272.48$8,746
Dec 1999682124.282.42$16,561
Nov 1999496123.192.43$11,505
Oct 1999477120.982.80$10,010
Sep 1999457121.752.62$9,942
Aug 1999609119.262.88$11,732
Jul 1999462117.892.37$8,268
Jun 1999641115.942.36$10,220
May 1999475115.792.32$7,503
Apr 1999481115.102.21$7,265
Mar 1999517112.471.84$6,449
Feb 199949419.981.82$4,932
Jan 1999647110.381.90$6,718
Dec 199848619.201.77$4,473
Nov 1998498110.892.19$5,425
Oct 1998624112.421.97$7,752
Sep 1998474112.592.08$5,970
Aug 1998491111.301.91$5,550
Jul 1998450111.742.24$5,285
Jun 1998318111.242.24$3,577
May 1998647112.622.21$8,167
Apr 1998458113.042.51$5,975
Mar 1998458112.802.31$5,865
Feb 1998320113.952.30$4,466
Jan 1998435114.702.15$6,397
Dec 1997497116.322.41$8,113
Nov 1997354118.193.09$6,442
Oct 1997520119.253.15$10,013
Sep 1997332117.742.95$5,893
Aug 1997323117.862.55$5,771
Jul 1997325117.582.25$5,716
Jun 1997495117.242.26$8,536
May 1997144118.972.31$2,734
Apr 1997313117.882.08$5,599
Mar 1997332118.951.94$6,293
Feb 1997321120.492.21$6,580
Jan 1997327123.483.54$7,682
Dec 1996179123.32$4,174
Nov 1996327121.97$7,184
Oct 1996327123.31$7,622
Sep 1996492122.22$10,932
Aug 1996170120.26$3,444
Jul 1996176119.55$3,441
Jun 1996321118.73$6,012
May 1996337119.43$6,548
Apr 1996333121.51$7,163
Mar 1996325119.38$6,299
Feb 1996174116.98$2,955
Jan 1996321117.07$5,479
Dec 1995358117.19$6,154
Nov 1995169116.00$2,704
Oct 1995357115.43$5,509
Sep 1995345116.18$5,582
Aug 1995177115.92$2,818
Jul 1995353115.24$5,380
Jun 1995172116.41$2,823
May 1995347117.56$6,093
Apr 1995169117.73$2,996
Mar 1995335116.44$5,507
Feb 1995175116.58$2,902
Jan 1995246115.92$3,916
Dec 1994346115.03$5,200
Nov 1994318115.90$5,056
Oct 1994185115.58$2,882
Sep 1994326115.29$4,985
Aug 1994163116.13$2,629
Jul 1994335117.56$5,883
Jun 1994178117.09$3,042
May 1994359115.88$5,701
Apr 1994191114.14$2,701
Mar 1994343112.46$4,274
Feb 1994193112.50$2,413
Jan 1994348112.66$4,406
Dec 1993387112.33$4,772
Nov 1993209114.49$3,028
Oct 1993352115.85$5,579
Sep 1993328115.03$4,930
Aug 1993179115.66$2,803
Jul 1993219115.46$3,386
Jun 1993332116.79$5,574
May 1993360117.68$6,365
Apr 1993171118.05$3,087
Mar 1993334118.14$6,059
Feb 1993353117.90$6,319
Jan 1993179116.93$3,030

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                  151 bbl  × $106.41 =    $16,068
Casinghead gas         0 Mcf  × $  3.05 =         $0

────────────────────────────────────────────────────
Month total                                  $16,068

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/423 is the state's own key, not one this site invented.