CHALKLEY "A"

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

Gas lease lease 76404District 08Field 53010500Hydrogen sulphide fieldCondensateGasSaveExport
Value, all time
$1.5 M
Jan 1993 – May 2026
Value, last 12 filed months
$0
at the published price for each month
Months reported
401
no gaps in the span
Streams
2
condensate, 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 31 leases and 36 wells, and the rule below applies to all of them.

Discovered
1977-07-05
as the register files it
Field class
Oil and gas
the register's own label
Between wells
1,200 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 1992-12-14.

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.

The Commission's schedule remark for this field reads: TO 4645'

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
CondensateDisposition2,946 bbl$129,022
GasProduction677,862 Mcf$1,384,366
Total$1,513,388

313,891 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 (1)

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 31.1044, -102.6835. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.0 miles.

31.10438, -102.68352 · 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
0.0%
0 of 1 wells
With a plug date
0.0%
0 of 1 wells
Median depth
4,749 ft
1 wells filed one
Completion to plug
no well filed both dates

What the state filed about each well

On the RRC proration schedule
00.0%
A plug date is filed
00.0%
BothOn the schedule and plugged. Neither fact cancels the other.
00.0%
NeitherNo plug date, and not on the schedule.
1100.0%

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

The one well that filed a depth was drilled to 4,749 ft.

Completions filed
Mar 1978
1 of 1 wells

1 well

42-371324521 C4,749 ftMar 1978

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 202600106.413.05$0
Apr 20260098.932.87$0
Mar 20260089.753.15$0
Feb 20260063.503.75$0
Jan 20260059.138.00$0
Dec 20250056.664.41$0
Nov 20250058.593.93$0
Oct 20250059.383.30$0
Sep 20250062.743.08$0
Aug 20250063.933.01$0
Jul 20250066.743.32$0
Jun 20250066.483.13$0
May 20250060.553.23$0
Apr 20250062.363.54$0
Mar 20250067.704.27$0
Feb 2025164070.884.34$11,624
Jan 20250174.324.28$4
Dec 202404468.993.12$137
Nov 2024030069.052.20$660
Oct 20240071.372.28$0
Sep 20240069.612.36$0
Aug 20240075.632.06$0
Jul 20240079.932.15$0
Jun 20240078.082.63$0
May 2024016278.812.20$356
Apr 2024047884.451.66$793
Mar 2024049380.301.55$762
Feb 2024044776.091.78$797
Jan 2024047573.023.30$1,566
Dec 2023047671.262.61$1,243
Nov 2023046677.892.81$1,308
Oct 202315665085.443.09$15,335
Sep 2023093089.042.74$2,544
Aug 2023099680.522.67$2,662
Jul 202301,04574.852.64$2,761
Jun 2023087168.962.26$1,967
May 2023096770.622.23$2,154
Apr 2023086078.122.24$1,924
Mar 2023086872.852.39$2,077
Feb 2023061975.112.47$1,526
Jan 2023069176.533.39$2,341
Dec 2022054876.415.73$3,140
Nov 2022066685.005.65$3,760
Oct 2022073687.185.86$4,316
Sep 2022070184.888.16$5,723
Aug 2022066094.529.13$6,024
Jul 20220552101.587.54$4,163
Jun 20220505115.097.98$4,028
May 20220624109.378.43$5,262
Apr 2022157678104.226.84$20,998
Mar 20220972108.885.08$4,934
Feb 2022076791.054.86$3,727
Jan 2022091281.844.54$4,138
Dec 2021075071.323.90$2,924
Nov 2021070477.435.24$3,687
Oct 2021071879.795.71$4,103
Sep 2021052769.865.35$2,820
Aug 2021059666.024.22$2,515
Jul 2021047170.783.98$1,876
Jun 2021058469.493.38$1,974
May 2021060963.483.02$1,838
Apr 2021082160.362.76$2,265
Mar 2021095661.302.72$2,597
Feb 2021066057.805.55$3,662
Jan 2021092850.412.81$2,608
Dec 2020092144.642.68$2,464
Nov 2020065138.772.71$1,762
Oct 2020070536.972.48$1,747
Sep 202016673537.091.99$7,620
Aug 2020058839.982.39$1,402
Jul 20200638.371.83$11
Jun 20200034.901.69$0
May 20200016.921.81$0
Apr 2020023914.751.80$431
Mar 2020092130.341.86$1,710
Feb 2020069949.881.98$1,384
Jan 2020084257.252.09$1,764
Dec 2019086959.012.30$2,002
Nov 201901155.302.75$30
Oct 201901353.472.42$31
Sep 20190055.052.66$0
Aug 2019037253.112.30$857
Jul 2019080656.272.46$1,983
Jun 2019081552.782.49$2,030
May 2019041258.482.74$1,129
Apr 2019047962.632.75$1,318
Mar 2019072256.803.06$2,211
Feb 2019082250.852.79$2,295
Jan 2019094046.033.23$3,034
Dec 201816184246.594.19$11,025
Nov 2018092552.934.24$3,919
Oct 2018095261.443.40$3,235
Sep 2018090659.543.11$2,816
Aug 2018084459.403.07$2,588
Jul 2018068365.142.93$2,002
Jun 2018092460.183.08$2,843
May 2018086765.382.90$2,515
Apr 2018050763.842.90$1,471
Mar 2018077961.222.79$2,171
Feb 2018081961.782.77$2,265
Jan 2018081262.874.01$3,256
Dec 2017078457.272.92$2,290
Nov 201717923855.423.12$10,662
Oct 2017089249.292.98$2,661
Sep 2017070947.523.09$2,189
Aug 2017077145.373.00$2,316
Jul 2017049943.873.09$1,541
Jun 2017041642.493.09$1,284
May 2017072545.373.26$2,366
Apr 2017077047.933.21$2,473
Mar 2017082246.772.98$2,453
Feb 2017069950.452.95$2,064
Jan 2017031449.413.42$1,074
Dec 2016035848.763.72$1,333
Nov 2016034442.492.64$910
Oct 2016010046.193.09$309
Sep 201602941.553.10$90
Aug 201605641.442.92$164
Jul 201608741.622.92$254
Jun 2016010045.352.69$269
May 2016014342.521.99$285
Apr 2016019736.561.99$392
Mar 201604833.011.79$86
Feb 201602426.472.06$50
Jan 2016014927.352.36$352
Dec 2015015232.362.00$304
Nov 2015014838.792.17$321
Oct 2015014743.552.43$357
Sep 2015013542.992.76$372
Aug 2015014740.162.87$422
Jul 2015012448.152.95$365
Jun 2015012156.152.88$349
May 2015013655.212.96$402
Apr 2015013049.822.71$352
Mar 2015013742.892.93$402
Feb 2015010744.662.98$318
Jan 2015011143.433.10$344
Dec 2014011054.693.59$395
Nov 2014015870.464.25$672
Oct 2014026878.303.90$1,045
Sep 2014025486.164.05$1,028
Aug 2014025889.394.04$1,041
Jul 2014025096.564.18$1,045
Jun 2014023998.164.74$1,132
May 2014024294.734.73$1,144
Apr 2014023695.944.81$1,135
Mar 2014025795.895.06$1,300
Feb 2014024097.406.19$1,486
Jan 2014030090.404.86$1,458
Dec 2013030191.824.35$1,311
Nov 2013030688.853.74$1,144
Oct 2013032397.423.78$1,221
Sep 20130309104.113.72$1,149
Aug 20130308104.253.52$1,085
Jul 20130315102.523.72$1,171
Jun 2013030294.403.93$1,188
May 2013033494.834.15$1,386
Apr 2013034893.964.28$1,490
Mar 2013038693.623.91$1,510
Feb 2013035191.233.42$1,200
Jan 20135439391.603.42$6,290
Dec 2012046986.773.42$1,604
Nov 2012039886.953.62$1,443
Oct 2012033789.383.40$1,146
Sep 2012037194.672.92$1,083
Aug 2012034792.662.91$1,009
Jul 2012039885.133.02$1,202
Jun 2012037379.822.52$940
May 2012038491.612.49$956
Apr 20120407101.652.00$813
Mar 20120511105.052.22$1,135
Feb 20120399101.102.57$1,026
Jan 2012048598.092.73$1,326
Dec 2011047896.873.24$1,549
Nov 2011047495.723.31$1,570
Oct 2011046284.983.65$1,686
Sep 2011046183.623.99$1,837
Aug 2011048783.404.15$2,021
Jul 2011049294.144.52$2,222
Jun 2011049192.904.64$2,278
May 2011051198.134.40$2,251
Apr 20110463105.964.33$2,006
Mar 2011047296.364.06$1,915
Feb 2011050385.644.18$2,103
Jan 2011048086.504.59$2,203
Dec 2010048485.734.35$2,104
Nov 2010048080.843.80$1,822
Oct 2010053378.103.51$1,870
Sep 2010047172.633.98$1,874
Aug 2010051973.684.42$2,294
Jul 2010052272.554.74$2,472
Jun 2010049570.364.91$2,431
May 2010053071.124.24$2,245
Apr 2010051281.694.12$2,111
Mar 2010050178.394.39$2,199
Feb 2010039073.585.44$2,123
Jan 2010046874.365.96$2,791
Dec 2009054171.445.48$2,967
Nov 2009027374.593.75$1,024
Oct 200906172.544.11$251
Sep 200905165.543.06$156
Aug 2009010667.423.22$341
Jul 2009026261.133.46$908
Jun 2009047166.163.90$1,835
May 2009049254.743.93$1,931
Apr 2009049946.773.59$1,790
Mar 2009053642.144.06$2,176
Feb 2009030832.814.63$1,427
Jan 200901335.865.37$70
Dec 20080837.105.98$48
Nov 20080555.496.86$34
Oct 200801375.246.92$90
Sep 2008038101.767.88$299
Aug 2008034114.228.48$288
Jul 200808131.0811.39$91
Jun 2008019131.3313.03$248
May 20080337123.1711.57$3,901
Apr 20080572110.3110.45$5,980
Mar 20080542101.909.66$5,238
Feb 2008055992.538.77$4,903
Jan 2008054090.388.21$4,431
Dec 2007056588.337.30$4,126
Nov 2007057991.677.29$4,222
Oct 2007064382.856.92$4,451
Sep 2007063375.846.24$3,953
Aug 2007069769.066.39$4,452
Jul 2007065070.906.39$4,152
Jun 2007065262.007.55$4,922
May 2007071058.747.85$5,571
Apr 2007037059.617.81$2,888
Mar 2007072656.927.30$5,301
Feb 2007064755.108.22$5,316
Jan 2007073850.306.73$4,964
Dec 2006382256.656.92$5,857
Nov 2006175354.207.62$5,790
Oct 2006091954.906.01$5,527
Sep 200601,13360.085.04$5,707
Aug 200601,31568.717.34$9,652
Jul 200601,21969.376.34$7,732
Jun 200613789566.286.38$14,794
May 2006093966.016.42$6,033
Apr 200601,11064.397.36$8,170
Mar 200601,26956.707.08$8,988
Feb 200601,09157.597.75$8,456
Jan 200601,28260.598.93$11,453
Dec 200501,26454.9413.42$16,957
Nov 200515086654.6910.59$17,373
Oct 2005087058.3413.80$12,002
Sep 200501,08861.4512.08$13,142
Aug 200501,09761.519.80$10,747
Jul 200501,11955.697.84$8,777
Jun 200501,18952.337.38$8,776
May 200501,25645.226.65$8,354
Apr 200501,06649.207.36$7,846
Mar 200514799750.377.15$14,538
Feb 2005076645.226.31$4,835
Jan 2005082243.166.32$5,197
Dec 2004085939.866.75$5,799
Nov 2004087245.286.33$5,520
Oct 200401,13949.706.52$7,421
Sep 200401,04743.245.28$5,532
Aug 2004090942.375.55$5,046
Jul 2004089338.286.08$5,433
Jun 2004088536.106.43$5,693
May 2004097537.486.49$6,332
Apr 200401,07434.475.86$6,292
Mar 200401,36534.365.53$7,549
Feb 200401,18132.455.51$6,507
Jan 200401,42032.036.30$8,945
Dec 200301,25430.266.30$7,902
Nov 200301,46528.804.60$6,732
Oct 200301,51028.174.76$7,187
Sep 200301,45826.314.75$6,925
Aug 200301,57829.765.13$8,095
Jul 20031611,36729.415.17$11,804
Jun 200301,21328.565.98$7,257
May 200301,42826.595.97$8,529
Apr 200301,56026.675.41$8,435
Mar 200301,66531.146.10$10,150
Feb 200301,47033.487.93$11,651
Jan 200301,73430.315.58$9,679
Dec 200201,59126.914.85$7,722
Nov 200201,45524.664.14$6,019
Oct 200201,69926.464.23$7,185
Sep 200201,55727.443.64$5,660
Aug 20021651,76825.963.16$9,878
Jul 200201,65524.583.06$5,067
Jun 200201,53223.733.34$5,114
May 20021721,70924.663.58$10,367
Apr 200201,72623.653.51$6,062
Mar 200201,82122.003.10$5,650
Feb 200201,29118.222.38$3,067
Jan 200201,43017.172.38$3,397
Dec 200101,76416.932.36$4,171
Nov 200101,55118.072.41$3,731
Oct 200101,96719.782.53$4,974
Sep 200101,81324.262.25$4,082
Aug 200102,03724.873.05$6,219
Jul 200101,95123.933.20$6,238
Jun 200101,95324.563.82$7,469
May 200101,90025.524.31$8,184
Apr 200101,95524.685.34$10,431
Mar 200101,96324.545.38$10,554
Feb 200101,73027.755.77$9,977
Jan 200102,03727.478.40$17,108
Dec 200002,11626.889.12$19,303
Nov 20003402,13032.215.66$23,003
Oct 200002,12831.235.15$10,950
Sep 200002,05131.875.19$10,638
Aug 200001,85429.644.54$8,419
Jul 200002,32628.534.09$9,513
Jun 200002,23829.304.40$9,841
May 200002,14827.263.68$7,904
Apr 200002,32324.513.12$7,238
Mar 200002,53828.422.86$7,258
Feb 200002,34227.622.73$6,385
Jan 200002,59625.272.48$6,439
Dec 199902,58324.282.42$6,260
Nov 199902,70923.192.43$6,594
Oct 199902,87620.982.80$8,063
Sep 199902,52721.752.62$6,618
Aug 199902,95019.262.88$8,483
Jul 199902,60917.892.37$6,190
Jun 199902,57015.942.36$6,071
May 199903,12215.792.32$7,246
Apr 19994523,01515.102.21$13,482
Mar 199903,36712.471.84$6,190
Feb 199903,0749.981.82$5,588
Jan 199903,36010.381.90$6,384
Dec 199803,4679.201.77$6,148
Nov 199803,55210.892.19$7,764
Oct 199803,80012.421.97$7,483
Sep 199803,99312.592.08$8,316
Aug 199804,22411.301.91$8,057
Jul 199803,72611.742.24$8,336
Jun 199804,11611.242.24$9,209
May 199804,33612.622.21$9,567
Apr 199804,17513.042.51$10,460
Mar 199803,75612.802.31$8,674
Feb 199803,92713.952.30$9,029
Jan 199804,63214.702.15$9,981
Dec 199704,82316.322.41$11,629
Nov 199704,84918.193.09$14,975
Oct 199705,03619.253.15$15,862
Sep 199705,03717.742.95$14,884
Aug 19971814,85117.862.55$15,626
Jul 199705,65217.582.25$12,700
Jun 199705,50117.242.26$12,417
May 199705,66318.972.31$13,073
Apr 199705,39617.882.08$11,239
Mar 199703,92218.951.94$7,605
Feb 199703,54820.492.21$7,827
Jan 199704,08923.483.54$14,474
Dec 199604,44223.32$0
Nov 199604,51921.97$0
Oct 199604,55423.31$0
Sep 199605,19622.22$0
Aug 199605,81820.26$0
Jul 199605,46719.55$0
Jun 199604,75118.73$0
May 199605,44319.43$0
Apr 199605,21821.51$0
Mar 199605,36119.38$0
Feb 199605,70016.98$0
Jan 199605,89317.07$0
Dec 199506,21517.19$0
Nov 199505,17716.00$0
Oct 199505,94215.43$0
Sep 199506,04216.18$0
Aug 199505,21515.92$0
Jul 199506,19415.24$0
Jun 199506,06416.41$0
May 199506,44917.56$0
Apr 199505,24417.73$0
Mar 199506,04716.44$0
Feb 199505,62116.58$0
Jan 199506,73615.92$0
Dec 199406,67315.03$0
Nov 199406,70115.90$0
Oct 199407,23215.58$0
Sep 199407,22015.29$0
Aug 199407,24716.13$0
Jul 199406,58317.56$0
Jun 199406,86817.09$0
May 199406,85715.88$0
Apr 199406,72514.14$0
Mar 199406,67212.46$0
Feb 199405,73512.50$0
Jan 199406,65912.66$0
Dec 199306,14112.33$0
Nov 199307,23714.49$0
Oct 199309,25515.85$0
Sep 199307,89015.03$0
Aug 199308,67215.66$0
Jul 199308,72515.46$0
Jun 199307,65216.79$0
May 199307,45717.68$0
Apr 199308,60118.05$0
Mar 199309,51118.14$0
Feb 199308,58117.90$0
Jan 199309,68916.93$0

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.

Feb 2025 — as filed, then multipliedworked
Condensate           164 bbl  × $ 70.88 =    $11,624
Gas                    0 Mcf  × $  4.34 =         $0

────────────────────────────────────────────────────
Month total                                  $11,624

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/G/76404 is the state's own key, not one this site invented.