CHALKLEY

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 139820District 08Field 53010500Hydrogen sulphide fieldCondensateGasSaveExport
Value, all time
$4.7 M
Jan 1993 – May 2026
Value, last 12 filed months
$3 k
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
CondensateDisposition1,859 bbl$131,896
GasProduction1,740,682 Mcf$4,616,052
Total$4,747,948

597,409 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 31.1077, -102.6841. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.0 miles.

31.10768, -102.68411 · 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
4,740 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 4,740 ft.

Completions filed
Jun 1991
1 of 1 wells

1 well

42-3713180514,740 ftJun 1991

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 202608063.503.75$300
Jan 202603459.138.00$272
Dec 2025015056.664.41$662
Nov 202503858.593.93$149
Oct 20250059.383.30$0
Sep 202508962.743.08$274
Aug 2025011763.933.01$353
Jul 2025010066.743.32$332
Jun 2025013166.483.13$410
May 2025022260.553.23$718
Apr 2025021962.363.54$776
Mar 2025011867.704.27$504
Feb 2025021470.884.34$929
Jan 202501,06674.324.28$4,561
Dec 2024019068.993.12$593
Nov 2024012369.052.20$270
Oct 202408371.372.28$189
Sep 2024013969.612.36$329
Aug 202406575.632.06$134
Jul 2024010479.932.15$223
Jun 2024024278.082.63$637
May 202401,63178.812.20$3,586
Apr 202402,52284.451.66$4,185
Mar 202402,61680.301.55$4,042
Feb 202402,55076.091.78$4,548
Jan 202402,64273.023.30$8,712
Dec 202302,73771.262.61$7,146
Nov 202302,52977.892.81$7,100
Oct 202302,05985.443.09$6,357
Sep 202302,11189.042.74$5,774
Aug 202302,09280.522.67$5,592
Jul 202302,49874.852.64$6,599
Jun 202302,60968.962.26$5,892
May 202302,71870.622.23$6,054
Apr 202302,63778.122.24$5,901
Mar 202302,52772.852.39$6,048
Feb 202302,17975.112.47$5,373
Jan 202302,70376.533.39$9,157
Dec 202202,01676.415.73$11,550
Nov 202202,69485.005.65$15,211
Oct 202202,62087.185.86$15,363
Sep 202202,62284.888.16$21,405
Aug 202202,59094.529.13$23,639
Jul 202202,139101.587.54$16,133
Jun 202201,232115.097.98$9,828
May 202201,491109.378.43$12,574
Apr 202201,285104.226.84$8,786
Mar 202201,489108.885.08$7,559
Feb 202202,38191.054.86$11,569
Jan 202203,01181.844.54$13,663
Dec 202102,89471.323.90$11,284
Nov 202102,38277.435.24$12,474
Oct 202102,62279.795.71$14,982
Sep 202101,94269.865.35$10,391
Aug 202102,91766.024.22$12,311
Jul 202103,11370.783.98$12,396
Jun 202102,58969.493.38$8,752
May 202102,55263.483.02$7,701
Apr 202103,06860.362.76$8,463
Mar 202102,44061.302.72$6,629
Feb 202101,79157.805.55$9,936
Jan 202102,67850.412.81$7,526
Dec 202002,55744.642.68$6,841
Nov 202002,18838.772.71$5,922
Oct 202002,49836.972.48$6,191
Sep 202002,16937.091.99$4,319
Aug 202002,02739.982.39$4,835
Jul 2020081438.371.83$1,486
Jun 20200034.901.69$0
May 2020056916.921.81$1,033
Apr 2020021514.751.80$388
Mar 202002,99830.341.86$5,565
Feb 202002,28949.881.98$4,534
Jan 202003,11157.252.09$6,517
Dec 201903,11859.012.30$7,185
Nov 201903,02155.302.75$8,310
Oct 201903,13653.472.42$7,585
Sep 201903,10055.052.66$8,238
Aug 201902,97553.112.30$6,855
Jul 201902,49356.272.46$6,133
Jun 201902,98852.782.49$7,444
May 201901,06958.482.74$2,929
Apr 201901,98862.632.75$5,468
Mar 201903,15356.803.06$9,655
Feb 201903,16550.852.79$8,837
Jan 201903,48146.033.23$11,237
Dec 201803,63546.594.19$15,214
Nov 201803,16252.934.24$13,398
Oct 201803,55261.443.40$12,070
Sep 201803,37959.543.11$10,502
Aug 201803,56659.403.07$10,935
Jul 201802,50965.142.93$7,356
Jun 201803,55760.183.08$10,945
May 201803,09965.382.90$8,990
Apr 20180063.842.90$0
Mar 20180061.222.79$0
Feb 20180061.782.77$0
Jan 2018016062.874.01$641
Dec 20170057.272.92$0
Nov 2017094855.423.12$2,956
Oct 201703,52749.292.98$10,523
Sep 201702,19347.523.09$6,770
Aug 201702,17245.373.00$6,526
Jul 201701,81643.873.09$5,607
Jun 201741,16842.493.09$3,776
May 201701,54145.373.26$5,029
Apr 2017221,53347.933.21$5,978
Mar 2017312,16146.772.98$7,898
Feb 2017132,37250.452.95$7,659
Jan 2017312,72549.413.42$10,848
Dec 2016623,22048.763.72$15,011
Nov 2016472,04742.492.64$7,410
Oct 201602,21946.193.09$6,857
Sep 20166454841.553.10$4,358
Aug 201602,38541.442.92$6,975
Jul 201602,10941.622.92$6,167
Jun 201602,21945.352.69$5,960
May 201601,39142.521.99$2,770
Apr 2016056236.561.99$1,119
Mar 20160033.011.79$0
Feb 2016026826.472.06$553
Jan 201601,85927.352.36$4,395
Dec 2015912,00632.362.00$6,960
Nov 201501,71438.792.17$3,715
Oct 201501,85743.552.43$4,506
Sep 201501,93442.992.76$5,335
Aug 201501,99640.162.87$5,733
Jul 201512,03348.152.95$6,036
Jun 201501,99856.152.88$5,760
May 201502,02555.212.96$5,985
Apr 20151382,00749.822.71$12,307
Mar 201502,09742.892.93$6,154
Feb 201501,82144.662.98$5,420
Jan 201502,19543.433.10$6,806
Dec 201402,22754.693.59$7,998
Nov 201402,12570.464.25$9,035
Oct 201402,09978.303.90$8,188
Sep 201402,02686.164.05$8,196
Aug 201402,63889.394.04$10,645
Jul 201402,49096.564.18$10,407
Jun 201402,21298.164.74$10,478
May 201402,36594.734.73$11,178
Apr 201401,15395.944.81$5,545
Mar 201401,13995.895.06$5,760
Feb 2014931,13997.406.19$16,111
Jan 201401,39990.404.86$6,800
Dec 201301,36991.824.35$5,961
Nov 201301,40588.853.74$5,252
Oct 201301,39097.423.78$5,253
Sep 2013421,353104.113.72$9,403
Aug 201301,515104.253.52$5,337
Jul 201301,456102.523.72$5,413
Jun 201301,36394.403.93$5,361
May 2013411,36494.834.15$9,547
Apr 201301,55993.964.28$6,677
Mar 201301,71393.623.91$6,703
Feb 201301,54891.233.42$5,294
Jan 201301,62791.603.42$5,564
Dec 20120486.773.42$14
Nov 201201,65586.953.62$5,999
Oct 201201,69089.383.40$5,745
Sep 201201,63094.672.92$4,757
Aug 2012451,73692.662.91$9,218
Jul 201201,82685.133.02$5,516
Jun 201201,75479.822.52$4,418
May 201211,89091.612.49$4,795
Apr 201201,842101.652.00$3,678
Mar 201201,914105.052.22$4,253
Feb 2012971,806101.102.57$14,449
Jan 201201,96598.092.73$5,372
Dec 201102,07796.873.24$6,729
Nov 201102,15195.723.31$7,123
Oct 201102,46184.983.65$8,979
Sep 201102,83883.623.99$11,312
Aug 201102,70783.404.15$11,232
Jul 201102,77494.144.52$12,531
Jun 2011482,80392.904.64$17,465
May 201102,94998.134.40$12,990
Apr 201102,728105.964.33$11,821
Mar 2011512,54996.364.06$15,257
Feb 201102,38385.644.18$9,961
Jan 201102,80286.504.59$12,858
Dec 201002,96585.734.35$12,891
Nov 201002,74180.843.80$10,403
Oct 201002,76278.103.51$9,692
Sep 201002,32072.633.98$9,232
Aug 2010502,88073.684.42$16,412
Jul 201002,92572.554.74$13,854
Jun 2010452,66770.364.91$16,262
May 201002,86271.124.24$12,121
Apr 2010452,81481.694.12$15,277
Mar 201003,07278.394.39$13,482
Feb 201002,48473.585.44$13,519
Jan 201002,88674.365.96$17,212
Dec 200902,76071.445.48$15,135
Nov 200902,42274.593.75$9,086
Oct 200902,37572.544.11$9,762
Sep 2009472,48665.543.06$10,699
Aug 200902,04167.423.22$6,569
Jul 200901,72161.133.46$5,962
Jun 2009481,88366.163.90$10,510
May 200902,06354.743.93$8,099
Apr 2009582,26946.773.59$10,853
Mar 200902,46742.144.06$10,014
Feb 200902,31932.814.63$10,744
Jan 200902,81435.865.37$15,114
Dec 2008642,61537.105.98$18,005
Nov 200802,41455.496.86$16,561
Oct 200802,24275.246.92$15,519
Sep 200802,748101.767.88$21,646
Aug 200802,747114.228.48$23,303
Jul 200803,129131.0811.39$35,638
Jun 2008582,736131.3313.03$43,274
May 2008592,981123.1711.57$41,770
Apr 200802,992110.3110.45$31,281
Mar 2008562,501101.909.66$29,876
Feb 200802,47892.538.77$21,734
Jan 200802,88590.388.21$23,674
Dec 200702,96288.337.30$21,628
Nov 200702,98891.677.29$21,788
Oct 2007583,24182.856.92$27,239
Sep 200703,15675.846.24$19,707
Aug 2007573,11569.066.39$23,835
Jul 200703,08170.906.39$19,681
Jun 200703,10362.007.55$23,423
May 2007563,12458.747.85$27,801
Apr 200701,71759.617.81$13,402
Mar 2007562,48356.927.30$21,318
Feb 200702,79455.108.22$22,956
Jan 200703,27750.306.73$22,044
Dec 200603,33956.656.92$23,101
Nov 2006632,93354.207.62$25,757
Oct 200603,48954.906.01$20,982
Sep 200603,43260.085.04$17,288
Aug 200603,49968.717.34$25,682
Jul 200603,39169.376.34$21,508
Jun 2006583,22766.286.38$24,445
May 200613,42966.016.42$22,097
Apr 2006573,39064.397.36$28,622
Mar 200603,50156.707.08$24,797
Feb 200602,24557.597.75$17,401
Jan 200602,86360.598.93$25,576
Dec 200503,23954.9413.42$43,452
Nov 200501,92854.6910.59$20,414
Oct 200503,13758.3413.80$43,277
Sep 200503,11061.4512.08$37,566
Aug 200503,47561.519.80$34,044
Jul 200503,62155.697.84$28,402
Jun 200513,48452.337.38$25,768
May 200503,74945.226.65$24,935
Apr 200503,65349.207.36$26,888
Mar 200503,73750.377.15$26,738
Feb 200503,36445.226.31$21,233
Jan 200503,61543.166.32$22,855
Dec 200403,72539.866.75$25,148
Nov 200403,55445.286.33$22,498
Oct 200403,78949.706.52$24,686
Sep 200403,67443.245.28$19,413
Aug 200403,76242.375.55$20,882
Jul 200403,79838.286.08$23,108
Jun 200403,72136.106.43$23,937
May 200402,58537.486.49$16,788
Apr 200401,58734.475.86$9,297
Mar 200402,39434.365.53$13,239
Feb 200403,49432.455.51$19,251
Jan 200403,87132.036.30$24,386
Dec 200303,87530.266.30$24,419
Nov 200303,90428.804.60$17,940
Oct 200304,16328.174.76$19,814
Sep 200304,11826.314.75$19,558
Aug 200304,19029.765.13$21,494
Jul 200302,27029.415.17$11,738
Jun 200302,78828.565.98$16,680
May 200304,39126.595.97$26,226
Apr 200304,25226.675.41$22,992
Mar 200304,30531.146.10$26,243
Feb 200303,71933.487.93$29,476
Jan 200304,54530.315.58$25,370
Dec 200203,61526.914.85$17,546
Nov 200202,86724.664.14$11,861
Oct 200204,26226.464.23$18,025
Sep 200204,06827.443.64$14,788
Aug 200204,83525.963.16$15,299
Jul 200204,81224.583.06$14,733
Jun 200204,51323.733.34$15,065
May 200205,25424.663.58$18,830
Apr 200205,09223.653.51$17,885
Mar 200204,78622.003.10$14,850
Feb 200202,38118.222.38$5,656
Jan 200202,10917.172.38$5,010
Dec 200102,55716.932.36$6,046
Nov 200102,29518.072.41$5,521
Oct 200103,33319.782.53$8,429
Sep 200103,77024.262.25$8,487
Aug 200104,09924.873.05$12,515
Jul 200104,42523.933.20$14,147
Jun 200104,69024.563.82$17,935
May 200104,82525.524.31$20,783
Apr 200105,01724.685.34$26,767
Mar 200105,37324.545.38$28,888
Feb 200105,08527.755.77$29,326
Jan 200105,09627.478.40$42,800
Dec 200005,30026.889.12$48,349
Nov 200005,02632.215.66$28,437
Oct 200005,67431.235.15$29,196
Sep 200005,59531.875.19$29,018
Aug 200004,92829.644.54$22,377
Jul 200006,48928.534.09$26,538
Jun 200006,31929.304.40$27,786
May 200006,31327.263.68$23,230
Apr 200006,99124.513.12$21,784
Mar 200007,25928.422.86$20,759
Feb 200006,71227.622.73$18,300
Jan 200006,98625.272.48$17,329
Dec 199907,12424.282.42$17,267
Nov 199907,34723.192.43$17,883
Oct 199907,03220.982.80$19,716
Sep 199906,76721.752.62$17,722
Aug 199907,72019.262.88$22,200
Jul 199906,67817.892.37$15,843
Jun 199907,90115.942.36$18,663
May 199908,22615.792.32$19,093
Apr 199908,02315.102.21$17,715
Mar 199908,87712.471.84$16,319
Feb 199908,6149.981.82$15,658
Jan 199909,70510.381.90$18,439
Dec 199809,9209.201.77$17,591
Nov 1998010,27210.892.19$22,452
Oct 199805,63512.421.97$11,097
Sep 199807,07812.592.08$14,741
Aug 199808,63411.301.91$16,468
Jul 199808,60311.742.24$19,247
Jun 199809,80311.242.24$21,932
May 1998010,60712.622.21$23,403
Apr 1998010,03713.042.51$25,146
Mar 199808,08112.802.31$18,663
Feb 199808,38513.952.30$19,278
Jan 1998010,25514.702.15$22,097
Dec 1997011,09716.322.41$26,756
Nov 1997011,23418.193.09$34,694
Oct 1997012,17719.253.15$38,355
Sep 1997012,22117.742.95$36,112
Aug 1997011,61717.862.55$29,678
Jul 1997011,75617.582.25$26,415
Jun 199709,53117.242.26$21,513
May 199709,23918.972.31$21,328
Apr 199709,47017.882.08$19,724
Mar 1997012,09818.951.94$23,460
Feb 1997011,53820.492.21$25,452
Jan 1997013,93223.483.54$49,315
Dec 1996015,46523.32$0
Nov 1996015,76221.97$0
Oct 1996015,44023.31$0
Sep 1996016,37222.22$0
Aug 199605,29520.26$0
Jul 199604,12319.55$0
Jun 199605,00718.73$0
May 199606,52219.43$0
Apr 199605,43621.51$0
Mar 199605,18419.38$0
Feb 199605,79916.98$0
Jan 199605,73817.07$0
Dec 199505,88517.19$0
Nov 199505,70616.00$0
Oct 199507,87615.43$0
Sep 199509,13716.18$0
Aug 199507,28115.92$0
Jul 199508,37115.24$0
Jun 199508,31116.41$0
May 199509,77817.56$0
Apr 199507,70617.73$0
Mar 1995010,44916.44$0
Feb 199507,19516.58$0
Jan 1995013,90315.92$0
Dec 1994017,49915.03$0
Nov 1994010,55915.90$0
Oct 199408,86615.58$0
Sep 199407,74115.29$0
Aug 199409,61516.13$0
Jul 199409,78217.56$0
Jun 1994012,70317.09$0
May 1994015,53715.88$0
Apr 1994016,19114.14$0
Mar 1994015,48512.46$0
Feb 1994015,10212.50$0
Jan 1994016,88812.66$0
Dec 1993019,50312.33$0
Nov 1993018,21614.49$0
Oct 1993018,51415.85$0
Sep 1993016,19015.03$0
Aug 1993020,26815.66$0
Jul 1993020,15515.46$0
Jun 1993019,35616.79$0
May 1993021,05717.68$0
Apr 1993021,22118.05$0
Mar 1993021,37318.14$0
Feb 1993018,58417.90$0
Jan 1993019,26316.93$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 2026 — as filed, then multipliedworked
Condensate             0 bbl  × $ 63.50 =         $0
Gas                   80 Mcf  × $  3.75 =       $300

────────────────────────────────────────────────────
Month total                                     $300

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/139820 is the state's own key, not one this site invented.