ATAPCO DEVONIAN UNIT

Operated by OLSEN ENERGY INC. (P-5 621750) in the ATAPCO (DEVONIAN) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 33136District 08Field 04184333OilCasinghead gasSaveExport
Value, all time
$32.9 M
Jan 1993 – May 2026
Value, last 12 filed months
$632 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 9 leases and 31 wells, and the rule below applies to all of them.

Discovered
1959-06-24
as the register files it
Field class
Oil and gas
the register's own label
Between wells
1,100 ft
minimum
From a lease line
467 ft
minimum

A drilling unit in this field needs at least 40 acres. The field rule took effect on 1959-12-21.

The Commission's schedule remark for this field reads: OIL FIELD RULES ADDED TO GAS 1/23/95

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
OilDisposition872,173 bbl$31,673,573
Casinghead gasProduction366,836 Mcf$1,234,743
Total$32,908,316

76,502 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 (19)

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 31.3107, -102.7422. A lease has no coordinate of its own — that point is the mean of its wells, and they span 1.0 miles.

31.31033, -102.74061 · 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
47.4%
9 of 19 wells
With a plug date
52.6%
10 of 19 wells
Median depth
5,655 ft
18 wells filed one
Completion to plug
25.6 years
median over 9 wells

What the state filed about each well

On the RRC proration schedule
947.4%
A plug date is filed
1052.6%
BothOn the schedule and plugged. Neither fact cancels the other.
947.4%
NeitherNo plug date, and not on the schedule.
947.4%

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, 18 of 19 wells. Median 5,655 ft, with the middle half between 5,585 and 5,698 ft; the shallowest is 151 ft and the deepest 5,800 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, 19 of 19 wells, Jul 1990 – Dec 2001. This is the LAST completion filed on each wellbore, not the first — a well recompleted in 2019 counts once, in the 2010s.

Completions filed
Jul 1990 – Dec 2001
19 of 19 wells
Plug dates filed
May 1976 – May 2023
10 of 19 wells; 9 filed none

Last completion to plug: a median of 25.6 years across the 9 wells that filed both dates, with the middle half between 23.4 years and 29.9 years. A further 1 well is excluded, because the last completion the Commission holds for it is dated after the plug date. Both dates are the latest of their kind on the wellbore record and they are filed separately, so the two need not run in order. The gap is the distance between two filed dates — it is not a statement of how long the well produced.

19 wells

42-10334861165,650 ftDec 2001
42-10304877B 15,660 ftDec 1997May 1976
42-10334533155,630 ftApr 1997
42-103046923W5,690 ftSep 1991
42-1033368214W5,464 ftSep 1991Oct 1996Yes
42-1030487313LW5,570 ftSep 1991
42-1033413925WS650 ftAug 1991Jan 1993Yes
42-103048747LW5,670 ftAug 1991Mar 2017Yes
42-10334138125,580 ftAug 1991
42-103048819LW5,680 ftAug 1991Mar 2017Yes
42-103341452WS151 ftAug 1991
42-103341341W5,785 ftAug 1991May 2023Yes
42-1033413310W5,611 ftJul 1991May 2023Yes
42-1033413145,710 ftJul 1991
42-103341322W5,800 ftJul 1991Dec 2014Yes
42-1033413565,700 ftJul 1991Jun 2021Yes
42-1033413655,735 ftJul 1991Mar 2020Yes
42-10334137115,600 ftJul 1991
42-103048788Jul 1990

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 20269320106.413.05$99,174
Apr 2026926098.932.87$91,609
Mar 2026921089.753.15$82,660
Feb 2026897063.503.75$56,960
Jan 2026742059.138.00$43,874
Dec 2025727056.664.41$41,192
Nov 2025546058.593.93$31,990
Oct 2025536059.383.30$31,828
Sep 2025719062.743.08$45,110
Aug 2025543063.933.01$34,714
Jul 2025551166.743.32$36,777
Jun 2025538166.483.13$35,769
May 20257033660.553.23$42,683
Apr 202573019962.363.54$46,228
Mar 2025907067.704.27$61,404
Feb 2025299070.884.34$21,193
Jan 2025727074.324.28$54,031
Dec 2024732068.993.12$50,501
Nov 20247404669.052.20$51,198
Oct 20240071.372.28$0
Sep 202436125369.612.36$25,727
Aug 202472763275.632.06$56,287
Jul 202472440279.932.15$58,732
Jun 20240678.082.63$16
May 202436624178.812.20$29,374
Apr 202474462384.451.66$63,864
Mar 202472068080.301.55$58,867
Feb 202474060376.091.78$57,382
Jan 202472744973.023.30$54,566
Dec 20231,07050071.262.61$77,554
Nov 20231868677.892.81$14,729
Oct 202371127085.443.09$61,581
Sep 2023356089.042.74$31,698
Aug 202335910880.522.67$29,195
Jul 202369731874.852.64$53,011
Jun 20231,08223668.962.26$75,148
May 202370823470.622.23$50,520
Apr 202369524978.122.24$54,851
Mar 202369727372.852.39$51,430
Feb 20231,05918675.112.47$80,000
Jan 202390626376.533.39$70,227
Dec 202272820976.415.73$56,824
Nov 202272237785.005.65$63,499
Oct 202253022387.185.86$47,513
Sep 202255517384.888.16$48,521
Aug 20221,21537994.529.13$118,301
Jul 2022904338101.587.54$94,378
Jun 2022900365115.097.98$106,493
May 2022752356109.378.43$85,248
Apr 20221,259406104.226.84$133,989
Mar 20221,063366108.885.08$117,597
Feb 202253632891.054.86$50,397
Jan 202218017881.844.54$15,539
Dec 202118014671.323.90$13,407
Nov 20211,42065577.435.24$113,381
Oct 202168784179.795.71$59,621
Sep 20211,25194769.865.35$92,462
Aug 20211,03871066.024.22$71,525
Jul 202112910570.783.98$9,549
Jun 202133916069.493.38$24,098
May 202116513163.483.02$10,870
Apr 202116911860.362.76$10,526
Mar 20213302761.302.72$20,302
Feb 202132212657.805.55$19,311
Jan 202133313350.412.81$17,160
Dec 2020013344.642.68$356
Nov 202016417338.772.71$6,827
Oct 202018316636.972.48$7,177
Sep 202034413837.091.99$13,034
Aug 202016710839.982.39$6,934
Jul 20201788738.371.83$6,989
Jun 202034910734.901.69$12,361
May 20203466016.921.81$5,963
Apr 202004114.751.80$74
Mar 202069540830.341.86$21,844
Feb 202034914549.881.98$17,695
Jan 20201,02162257.252.09$59,755
Dec 201952637559.012.30$31,903
Nov 201968034355.302.75$38,547
Oct 201965142053.472.42$35,825
Sep 201948015655.052.66$26,839
Aug 201947122253.112.30$25,526
Jul 201948412356.272.46$27,537
Jun 201916220052.782.49$9,049
May 201946811458.482.74$27,681
Apr 201932725162.632.75$21,170
Mar 201933024056.803.06$19,479
Feb 201949727150.852.79$26,029
Jan 20191609746.033.23$7,678
Dec 201815815446.594.19$8,006
Nov 201805352.934.24$225
Oct 2018010261.443.40$347
Sep 201816211359.543.11$9,997
Aug 201832423859.403.07$19,975
Jul 201834012265.142.93$22,505
Jun 201832716760.183.08$20,193
May 201832827965.382.90$22,254
Apr 201848821163.842.90$31,766
Mar 201832237761.222.79$20,763
Feb 201864529261.782.77$40,656
Jan 201847430162.874.01$31,007
Dec 201715540657.272.92$10,063
Nov 201763943355.423.12$36,764
Oct 201732727049.292.98$16,923
Sep 201730830147.523.09$15,565
Aug 201732620645.373.00$15,410
Jul 201731822343.873.09$14,639
Jun 2017015242.493.09$469
May 201765826645.373.26$30,722
Apr 2017025347.933.21$813
Mar 201715824946.772.98$8,133
Feb 201733014150.452.95$17,065
Jan 20170049.413.42$0
Dec 20160048.763.72$0
Nov 20160042.492.64$0
Oct 2016027246.193.09$841
Sep 201618920841.553.10$8,498
Aug 201633119941.442.92$14,299
Jul 201617825741.622.92$8,160
Jun 201665829945.352.69$30,643
May 201634244742.521.99$15,432
Apr 201667626236.561.99$25,236
Mar 201633110033.011.79$11,106
Feb 201608126.472.06$167
Jan 2016021527.352.36$508
Dec 20151,36044832.362.00$44,906
Nov 20151,00662538.792.17$40,377
Oct 20151,48248743.552.43$65,723
Sep 2015977042.992.76$42,001
Aug 201597349140.162.87$40,486
Jul 2015325048.152.95$15,649
Jun 201566734056.152.88$38,432
May 201548827855.212.96$27,764
Apr 2015657049.822.71$32,732
Mar 20153268142.892.93$14,220
Feb 201549926744.662.98$23,080
Jan 20151,28652543.433.10$57,479
Dec 20141,13856954.693.59$64,281
Nov 20141,31160270.464.25$94,933
Oct 20141,33469778.303.90$107,171
Sep 20141,33258086.164.05$117,111
Aug 20141,12455289.394.04$102,702
Jul 20141,17860796.564.18$116,285
Jun 20141,02246198.164.74$102,503
May 20141,04150994.734.73$101,020
Apr 201498736695.944.81$96,453
Mar 201485350195.895.06$84,328
Feb 201485745297.406.19$86,271
Jan 201483450590.404.86$77,848
Dec 201385963491.824.35$81,634
Nov 20131,18282288.853.74$108,094
Oct 20131,42471697.423.78$141,432
Sep 2013866525104.113.72$92,111
Aug 2013705566104.253.52$75,490
Jul 2013878575102.523.72$92,150
Jun 201386267094.403.93$84,008
May 20131,21371194.834.15$117,979
Apr 201384957493.964.28$82,230
Mar 201385663893.623.91$82,635
Feb 20131,04857091.233.42$97,558
Jan 201389057091.603.42$83,473
Dec 20121,05257386.773.42$93,242
Nov 20121,03955286.953.62$92,342
Oct 20121,07054189.383.40$97,476
Sep 201288460494.672.92$85,451
Aug 20121,39965392.662.91$131,530
Jul 20121,23968185.133.02$107,533
Jun 20121,04572579.822.52$85,238
May 20121,43474491.612.49$133,220
Apr 2012908740101.652.00$93,776
Mar 20121,251848105.052.22$133,302
Feb 20121,243709101.102.57$127,490
Jan 20121,21870998.092.73$121,412
Dec 20111,20572596.873.24$119,077
Nov 20111,18572495.723.31$115,826
Oct 20111,35695284.983.65$118,706
Sep 20111,3931,00783.623.99$120,496
Aug 201182790783.404.15$72,735
Jul 20111,8571,10294.144.52$179,796
Jun 20118271,10292.904.64$81,941
May 20111,51069498.134.40$151,233
Apr 20111,182540105.964.33$127,585
Mar 20112,1081,37296.364.06$208,694
Feb 20111,4321,04685.644.18$127,009
Jan 20111,32885286.504.59$118,782
Dec 20101,99583385.734.35$174,653
Nov 20101,5151,14080.843.80$126,799
Oct 20101,6401,16378.103.51$132,165
Sep 20101,48892072.633.98$111,735
Aug 20101,3461,27173.684.42$104,790
Jul 20101,6871,31872.554.74$128,635
Jun 20101,6881,30170.364.91$125,156
May 20101,7161,33571.124.24$127,696
Apr 20101,6891,36181.694.12$143,585
Mar 20101,6881,32178.394.39$138,120
Feb 20101,6531,03973.585.44$127,282
Jan 20102,0101,12374.365.96$156,161
Dec 20091,7461,20771.445.48$131,353
Nov 20092,0331,14374.593.75$155,929
Oct 20091,6821,05472.544.11$126,344
Sep 20092,5121,15765.543.06$168,182
Aug 20091,67990567.423.22$116,111
Jul 20092,0221,19061.133.46$127,728
Jun 20091,8321,01066.163.90$125,139
May 20092,65088254.743.93$148,524
Apr 20091,33955046.773.59$64,598
Mar 20091,69738342.144.06$73,066
Feb 20091,32336532.814.63$45,099
Jan 20091,68953135.865.37$63,420
Dec 20081,65753537.105.98$64,672
Nov 20081,84680555.496.86$107,957
Oct 20081,99584975.246.92$155,981
Sep 20081,341651101.767.88$141,588
Aug 20081,711638114.228.48$200,843
Jul 20081,348851131.0811.39$186,388
Jun 20081,540730131.3313.03$211,762
May 20081,672867123.1711.57$215,975
Apr 20081,879890110.3110.45$216,577
Mar 20082,414921101.909.66$254,887
Feb 20081,19073392.538.77$116,540
Jan 20081,66156990.388.21$154,790
Dec 20071,53569688.337.30$140,669
Nov 20071,03552591.677.29$98,707
Oct 20072,20899182.856.92$189,792
Sep 20071,83696875.846.24$145,287
Aug 20072,30796669.066.39$165,492
Jul 20072,1971,04970.906.39$162,468
Jun 20072,2211,07762.007.55$145,832
May 20072,14296058.747.85$133,354
Apr 20071,9311,07159.617.81$123,466
Mar 20072,8431,35756.927.30$171,732
Feb 20072,4021,60755.108.22$145,553
Jan 20072,04668150.306.73$107,495
Dec 20062,06288256.656.92$122,914
Nov 20061,70642354.207.62$95,687
Oct 20061,85995054.906.01$107,772
Sep 20062,20892660.085.04$137,321
Aug 20062,02791368.717.34$145,977
Jul 20062,03796469.376.34$147,421
Jun 20062,0181,04766.286.38$140,437
May 20061,68597666.016.42$117,498
Apr 20062,03178164.397.36$136,525
Mar 20061,88389056.707.08$113,070
Feb 20062,03783157.597.75$123,752
Jan 20062,36392160.598.93$151,402
Dec 20052,53795254.9413.42$152,154
Nov 20051,71299154.6910.59$104,122
Oct 20052,36794058.3413.80$151,059
Sep 20052,36399461.4512.08$157,213
Aug 20052,4141,08461.519.80$159,105
Jul 20052,0811,09455.697.84$124,472
Jun 20052,0861,06052.337.38$116,984
May 20052,75393545.226.65$130,709
Apr 20052,38579849.207.36$123,216
Mar 20052,22659650.377.15$116,388
Feb 20052,04526645.226.31$94,154
Jan 20052,19686543.166.32$100,248
Dec 20042,71487539.866.75$114,087
Nov 20042,6941,04645.286.33$128,606
Oct 20042,71593349.706.52$141,014
Sep 20042,5361,07643.245.28$115,342
Aug 20043,7251,18042.375.55$164,378
Jul 20042,5371,16638.286.08$104,211
Jun 20043,2081,32836.106.43$124,352
May 20043,3901,42237.486.49$136,292
Apr 20043,9001,43334.475.86$142,828
Mar 20043,8731,69834.365.53$142,466
Feb 20042,84399732.455.51$97,748
Jan 20042,6861,01632.036.30$92,433
Dec 20033,4081,14730.266.30$110,354
Nov 20033,0321,17628.804.60$92,726
Oct 20033,4711,14828.174.76$103,242
Sep 20033,2051,29126.314.75$90,455
Aug 20033,0811,42429.765.13$98,995
Jul 20033,0861,20529.415.17$96,990
Jun 20033,2501,22628.565.98$100,155
May 20033,7661,51926.595.97$109,210
Apr 20033,5771,54526.675.41$103,753
Mar 20033,9251,48631.146.10$131,283
Feb 20032,76293533.487.93$99,882
Jan 20032,93484330.315.58$93,635
Dec 20023,06791426.914.85$86,969
Nov 20023,4081,16824.664.14$88,873
Oct 20023,4321,33426.464.23$96,452
Sep 20022,9151,16627.443.64$84,226
Aug 20023,1191,31525.963.16$85,130
Jul 20023,4531,47724.583.06$89,397
Jun 20023,2571,36423.733.34$81,842
May 20023,3841,44524.663.58$88,628
Apr 20023,7071,37623.653.51$92,504
Mar 20023,5981,42722.003.10$83,584
Feb 20023,2551,21818.222.38$62,200
Jan 20023,7701,56817.172.38$68,456
Dec 20014,2721,75416.932.36$76,472
Nov 20013,4931,26818.072.41$66,169
Oct 20014,4891,39419.782.53$92,318
Sep 20013,6501,39824.262.25$91,696
Aug 20013,9091,39224.873.05$101,467
Jul 20013,8801,39123.933.20$97,296
Jun 20013,6251,43524.563.82$94,518
May 20014,1651,57825.524.31$113,088
Apr 20013,9191,45124.685.34$104,462
Mar 20014,2301,25624.545.38$110,557
Feb 20014,3411,21027.755.77$127,441
Jan 20013,61789327.478.40$106,859
Dec 20004,7001,22026.889.12$137,465
Nov 20004,4671,27332.215.66$151,085
Oct 20004,6891,61631.235.15$154,753
Sep 20004,3011,75231.875.19$146,160
Aug 20005,1152,14929.644.54$161,367
Jul 20004,9501,96128.534.09$149,244
Jun 20004,9071,93629.304.40$152,288
May 20005,5392,06627.263.68$158,596
Apr 20005,4501,82024.513.12$139,251
Mar 20006,5312,16828.422.86$191,811
Feb 20005,6091,68827.622.73$159,523
Jan 20005,6501,47925.272.48$146,444
Dec 19995,9811,54524.282.42$148,963
Nov 19995,9461,89223.192.43$142,493
Oct 19996,9772,38420.982.80$153,062
Sep 19997,3152,57121.752.62$165,834
Aug 19995,6682,14519.262.88$115,334
Jul 19994,9911,97817.892.37$93,982
Jun 19995,1061,67515.942.36$85,346
May 19995,5281,76015.792.32$91,372
Apr 19995,5031,44415.102.21$86,284
Mar 19995,8601,49412.471.84$75,821
Feb 19995,3691,2159.981.82$55,791
Jan 19995,9131,20310.381.90$63,663
Dec 19985,8791,3649.201.77$56,506
Nov 19985,7781,89310.892.19$67,060
Oct 19986,2122,31712.421.97$81,716
Sep 19986,2592,45912.592.08$83,922
Aug 19986,1912,68711.301.91$75,083
Jul 19986,4572,66711.742.24$81,772
Jun 19986,5262,59511.242.24$79,158
May 19987,4372,53412.622.21$99,446
Apr 19987,6322,64113.042.51$106,138
Mar 19988,3392,64212.802.31$112,841
Feb 19986,3152,11013.952.30$92,945
Jan 19987,5782,71314.702.15$117,243
Dec 19976,9742,38016.322.41$119,554
Nov 19977,5542,78018.193.09$145,993
Oct 19978,0932,78019.253.15$164,547
Sep 19975,7612,13117.742.95$108,497
Aug 19975,5092,62017.862.55$105,084
Jul 19975,5872,51517.582.25$103,871
Jun 19974,9642,45417.242.26$91,119
May 19974,6392,71318.972.31$94,265
Apr 19974,3972,18017.882.08$83,159
Mar 19974,6122,41618.951.94$92,082
Feb 19972,8741,16220.492.21$61,452
Jan 19973,5001,31523.483.54$86,835
Dec 19963,2551,48623.32$75,907
Nov 19963,6421,55221.97$80,015
Oct 19963,4771,23023.31$81,049
Sep 19963,5021,41922.22$77,814
Aug 19962,6881,33920.26$54,459
Jul 19963,7121,49919.55$72,570
Jun 19963,5861,42018.73$67,166
May 19963,4261,50619.43$66,567
Apr 19963,5181,53321.51$75,672
Mar 19963,93096619.38$76,163
Feb 19963,3181,15916.98$56,340
Jan 19964,0411,33817.07$68,980
Dec 19953,6491,25117.19$62,726
Nov 19953,7091,12316.00$59,344
Oct 19954,2451,38015.43$65,500
Sep 19953,7201,56116.18$60,190
Aug 19954,0741,80515.92$64,858
Jul 19954,0602,04215.24$61,874
Jun 19954,2481,89816.41$69,710
May 19953,7311,50017.56$65,516
Apr 19954,1731,89817.73$73,987
Mar 19953,9921,85516.44$65,628
Feb 19953,8241,94516.58$63,402
Jan 19954,4821,47515.92$71,353
Dec 19944,2681,49415.03$64,148
Nov 19943,3621,15815.90$53,456
Oct 19943,7661,08715.58$58,674
Sep 19943,4251,53015.29$52,368
Aug 19943,7761,75216.13$60,907
Jul 19943,2931,13617.56$57,825
Jun 19943,5111,17917.09$60,003
May 19943,6351,34915.88$57,724
Apr 19943,0571,05014.14$43,226
Mar 19943,6321,37312.46$45,255
Feb 19943,3411,19912.50$41,763
Jan 19943,0431,16512.66$38,524
Dec 19933,3691,61512.33$41,540
Nov 19933,2111,62014.49$46,527
Oct 19933,3221,84015.85$52,654
Sep 19932,9582,04315.03$44,459
Aug 19933,0361,86215.66$47,544
Jul 19932,8462,15315.46$43,999
Jun 19932,8342,20016.79$47,583
May 19932,6892,42317.68$47,542
Apr 19932,6162,27818.05$47,219
Mar 19932,6122,62518.14$47,382
Feb 19932,3051,76117.90$41,260
Jan 19932,5392,43016.93$42,985

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                  932 bbl  × $106.41 =    $99,174
Casinghead gas         0 Mcf  × $  3.05 =         $0

────────────────────────────────────────────────────
Month total                                  $99,174

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/33136 is the state's own key, not one this site invented.