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.

Oil lease lease 33238District 08Field 53010500Hydrogen sulphide fieldOilCasinghead gasSaveExport
Value, all time
$1.3 M
Jan 1993 – May 2026
Value, last 12 filed months
$105 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 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
OilDisposition32,621 bbl$1,048,353
Casinghead gasProduction239,023 Mcf$301,006
Total$1,349,359

144,532 Mcf of this lease's gas, across 47 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 31.1075, -102.6792. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.0 miles.

31.10751, -102.67917 · 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
4,850 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 4,850 ft.

Completions filed
Mar 1991
1 of 1 wells

1 well

42-3713245344,850 ftMar 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 20261160106.413.05$12,344
Apr 202659098.932.87$5,837
Mar 2026174089.753.15$15,617
Feb 2026118063.503.75$7,493
Jan 2026119059.138.00$7,036
Dec 2025118056.664.41$6,686
Nov 2025191058.593.93$11,191
Oct 202565059.383.30$3,860
Sep 2025173062.743.08$10,854
Aug 2025123063.933.01$7,863
Jul 2025123066.743.32$8,209
Jun 2025115066.483.13$7,645
May 2025178060.553.23$10,778
Apr 2025117062.363.54$7,296
Mar 2025180067.704.27$12,186
Feb 2025118070.884.34$8,364
Jan 2025119074.324.28$8,844
Dec 2024179068.993.12$12,349
Nov 2024173069.052.20$11,946
Oct 2024172071.372.28$12,276
Sep 2024190069.612.36$13,226
Aug 2024232075.632.06$17,546
Jul 2024166079.932.15$13,268
Jun 2024169078.082.63$13,196
May 2024109078.812.20$8,590
Apr 2024127084.451.66$10,725
Mar 2024255080.301.55$20,477
Feb 2024117076.091.78$8,903
Jan 2024120073.023.30$8,762
Dec 2023169071.262.61$12,043
Nov 2023174077.892.81$13,553
Oct 2023190085.443.09$16,234
Sep 2023301089.042.74$26,801
Aug 202361080.522.67$4,912
Jul 202356074.852.64$4,192
Jun 202357068.962.26$3,931
May 2023121070.622.23$8,545
Apr 202356078.122.24$4,375
Mar 202362072.852.39$4,517
Feb 2023119075.112.47$8,938
Jan 202363076.533.39$4,821
Dec 2022120076.415.73$9,169
Nov 202256085.005.65$4,760
Oct 202260087.185.86$5,231
Sep 2022124084.888.16$10,525
Aug 202261094.529.13$5,766
Jul 20221120101.587.54$11,377
Jun 20221200115.097.98$13,811
May 2022600109.378.43$6,562
Apr 20221240104.226.84$12,923
Mar 2022640108.885.08$6,968
Feb 202261091.054.86$5,554
Jan 202262081.844.54$5,074
Dec 20210071.323.90$0
Nov 20210077.435.24$0
Oct 20210079.795.71$0
Sep 20210069.865.35$0
Aug 20210066.024.22$0
Jul 20210070.783.98$0
Jun 20210069.493.38$0
May 20210063.483.02$0
Apr 20210060.362.76$0
Mar 20210061.302.72$0
Feb 20210057.805.55$0
Jan 20210050.412.81$0
Dec 20200044.642.68$0
Nov 20200038.772.71$0
Oct 20200036.972.48$0
Sep 20200037.091.99$0
Aug 20200039.982.39$0
Jul 20200038.371.83$0
Jun 20200034.901.69$0
May 20200016.921.81$0
Apr 20200014.751.80$0
Mar 20200030.341.86$0
Feb 20200049.881.98$0
Jan 20200057.252.09$0
Dec 20190059.012.30$0
Nov 20190055.302.75$0
Oct 20190053.472.42$0
Sep 20190055.052.66$0
Aug 20190053.112.30$0
Jul 20190056.272.46$0
Jun 20190052.782.49$0
May 20190058.482.74$0
Apr 20190062.632.75$0
Mar 20190056.803.06$0
Feb 20190050.852.79$0
Jan 20190046.033.23$0
Dec 20180046.594.19$0
Nov 20180052.934.24$0
Oct 20180061.443.40$0
Sep 20180059.543.11$0
Aug 20180059.403.07$0
Jul 20180065.142.93$0
Jun 20180060.183.08$0
May 20180065.382.90$0
Apr 20180063.842.90$0
Mar 20180061.222.79$0
Feb 20180061.782.77$0
Jan 20180062.874.01$0
Dec 20170057.272.92$0
Nov 20170055.423.12$0
Oct 20170049.292.98$0
Sep 20170047.523.09$0
Aug 20170045.373.00$0
Jul 20170043.873.09$0
Jun 20170042.493.09$0
May 20170045.373.26$0
Apr 20170047.933.21$0
Mar 20170046.772.98$0
Feb 20170050.452.95$0
Jan 20170049.413.42$0
Dec 20160048.763.72$0
Nov 20160042.492.64$0
Oct 20160046.193.09$0
Sep 20160041.553.10$0
Aug 20160041.442.92$0
Jul 20160041.622.92$0
Jun 20160045.352.69$0
May 20160042.521.99$0
Apr 20160036.561.99$0
Mar 20160033.011.79$0
Feb 20160026.472.06$0
Jan 20160027.352.36$0
Dec 20150032.362.00$0
Nov 20150038.792.17$0
Oct 20150043.552.43$0
Sep 20150042.992.76$0
Aug 20150040.162.87$0
Jul 20150048.152.95$0
Jun 20150056.152.88$0
May 20150055.212.96$0
Apr 201510049.822.71$498
Mar 20150042.892.93$0
Feb 20150044.662.98$0
Jan 20150043.433.10$0
Dec 201401454.693.59$50
Nov 201402870.464.25$119
Oct 20140078.303.90$0
Sep 20140086.164.05$0
Aug 20140089.394.04$0
Jul 20140096.564.18$0
Jun 20140098.164.74$0
May 20140094.734.73$0
Apr 20140095.944.81$0
Mar 20140095.895.06$0
Feb 201417097.406.19$1,656
Jan 20140090.404.86$0
Dec 20130091.824.35$0
Nov 20130088.853.74$0
Oct 20130097.423.78$0
Sep 201380104.113.72$833
Aug 201300104.253.52$0
Jul 201300102.523.72$0
Jun 20130094.403.93$0
May 201385394.834.15$979
Apr 201305993.964.28$253
Mar 201306693.623.91$258
Feb 201308591.233.42$291
Jan 201305091.603.42$171
Dec 201201286.773.42$41
Nov 201208186.953.62$294
Oct 201207289.383.40$245
Sep 201207994.672.92$231
Aug 201285592.662.91$901
Jul 201208585.133.02$257
Jun 201206179.822.52$154
May 201206191.612.49$152
Apr 2012085101.652.00$170
Mar 2012090105.052.22$200
Feb 20121884101.102.57$2,036
Jan 2012010498.092.73$284
Dec 201109796.873.24$314
Nov 201108795.723.31$288
Oct 201108684.983.65$314
Sep 201108583.623.99$339
Aug 201107583.404.15$311
Jul 2011010094.144.52$452
Jun 201198992.904.64$1,249
May 201108498.134.40$370
Apr 201100105.964.33$0
Mar 20119096.364.06$867
Feb 20110085.644.18$0
Jan 20110086.504.59$0
Dec 20100785.734.35$30
Nov 20100080.843.80$0
Oct 20100078.103.51$0
Sep 201002972.633.98$115
Aug 201092073.684.42$752
Jul 201001372.554.74$62
Jun 201083470.364.91$730
May 201005771.124.24$241
Apr 2010811181.694.12$1,111
Mar 2010010378.394.39$452
Feb 201001373.585.44$71
Jan 20100074.365.96$0
Dec 20090071.445.48$0
Nov 20090574.593.75$19
Oct 200905372.544.11$218
Sep 200982765.543.06$607
Aug 200909367.423.22$299
Jul 2009011261.133.46$388
Jun 2009820866.163.90$1,339
May 2009023854.743.93$934
Apr 2009830646.773.59$1,472
Mar 2009028142.144.06$1,141
Feb 2009025332.814.63$1,172
Jan 2009026935.865.37$1,445
Dec 2008924637.105.98$1,804
Nov 2008023955.496.86$1,640
Oct 2008931775.246.92$2,871
Sep 20080388101.767.88$3,056
Aug 20082187114.228.48$1,815
Jul 200800131.0811.39$0
Jun 200883131.3313.03$1,090
May 200880123.1711.57$985
Apr 2008019110.3110.45$199
Mar 2008846101.909.66$1,260
Feb 200824792.538.77$597
Jan 200805190.388.21$418
Dec 200706788.337.30$489
Nov 200705691.677.29$408
Oct 200784782.856.92$988
Sep 200706775.846.24$418
Aug 200787169.066.39$1,006
Jul 200705870.906.39$371
Jun 200706062.007.55$453
May 200785758.747.85$917
Apr 200701759.617.81$133
Mar 200786256.927.30$908
Feb 200706655.108.22$542
Jan 200707250.306.73$484
Dec 2006011556.656.92$796
Nov 2006153454.207.62$1,072
Oct 200603954.906.01$235
Sep 200606560.085.04$327
Aug 200609468.717.34$690
Jul 200606469.376.34$406
Jun 200687266.286.38$990
May 200606166.016.42$392
Apr 20062915164.397.36$19,113
Mar 200608256.707.08$581
Feb 20061457257.597.75$8,909
Jan 200608460.598.93$750
Dec 200509254.9413.42$1,234
Nov 20051558854.6910.59$9,409
Oct 200508758.3413.80$1,200
Sep 200508161.4512.08$978
Aug 20051499761.519.80$10,115
Jul 200508355.697.84$651
Jun 200509852.337.38$723
May 2005010145.226.65$672
Apr 2005011149.207.36$817
Mar 200517013250.377.15$9,507
Feb 2005014045.226.31$884
Jan 2005014843.166.32$936
Dec 2004014839.866.75$999
Nov 2004514745.286.33$1,157
Oct 2004018549.706.52$1,205
Sep 200415118543.245.28$7,507
Aug 2004017042.375.55$944
Jul 200417214638.286.08$7,472
Jun 20040036.106.43$0
May 2004020237.486.49$1,312
Apr 2004017334.475.86$1,014
Mar 2004023334.365.53$1,289
Feb 2004021932.455.51$1,207
Jan 200416221332.036.30$6,531
Dec 2003014530.266.30$914
Nov 2003018228.804.60$836
Oct 2003021128.174.76$1,004
Sep 200315921526.314.75$5,204
Aug 200315324629.765.13$5,815
Jul 2003023629.415.17$1,220
Jun 2003019128.565.98$1,143
May 2003018526.595.97$1,105
Apr 2003020626.675.41$1,114
Mar 2003022231.146.10$1,353
Feb 2003020433.487.93$1,617
Jan 200332426330.315.58$11,289
Dec 2002025926.914.85$1,257
Nov 200215232924.664.14$5,109
Oct 2002045626.464.23$1,928
Sep 200217239327.443.64$6,148
Aug 2002044425.963.16$1,405
Jul 2002046524.583.06$1,424
Jun 2002041223.733.34$1,375
May 200232044324.663.58$9,479
Apr 2002051023.653.51$1,791
Mar 200215233822.003.10$4,393
Feb 2002075018.222.38$1,782
Jan 2002060617.172.38$1,440
Dec 2001074316.932.36$1,757
Nov 2001060418.072.41$1,453
Oct 200117161619.782.53$4,940
Sep 200115957124.262.25$5,143
Aug 2001065424.873.05$1,997
Jul 200116459223.933.20$5,817
Jun 2001062524.563.82$2,390
May 200116062325.524.31$6,767
Apr 200112064724.685.34$6,414
Mar 200116076924.545.38$8,061
Feb 2001033627.755.77$1,938
Jan 200132047027.478.40$12,738
Dec 2000067626.889.12$6,167
Nov 2000083932.215.66$4,747
Oct 2000074431.235.15$3,828
Sep 2000072231.875.19$3,745
Aug 200016857529.644.54$7,590
Jul 200033568628.534.09$12,363
Jun 200015973529.304.40$7,891
May 2000075627.263.68$2,782
Apr 2000080424.513.12$2,505
Mar 200033190828.422.86$12,004
Feb 2000092727.622.73$2,527
Jan 20001621,00125.272.48$6,577
Dec 1999077924.282.42$1,888
Nov 199916193923.192.43$6,019
Oct 1999090720.982.80$2,543
Sep 199932479021.752.62$9,116
Aug 1999096919.262.88$2,786
Jul 199916390617.892.37$5,065
Jun 19991661,09715.942.36$5,237
May 19991601,07015.792.32$5,010
Apr 19991601,08115.102.21$4,803
Mar 19991611,22812.471.84$4,265
Feb 19991361,2889.981.82$3,699
Jan 19993411,38910.381.90$6,179
Dec 199801,4649.201.77$2,596
Nov 19981651,43710.892.19$4,938
Oct 19981711,49412.421.97$5,066
Sep 199801,51312.592.08$3,151
Aug 19983351,54711.301.91$6,736
Jul 19981781,30911.742.24$5,018
Jun 19981761,38611.242.24$5,079
May 19983491,53612.622.21$7,793
Apr 19981741,50813.042.51$6,047
Mar 19981671,66112.802.31$5,974
Feb 19981621,61913.952.30$5,982
Jan 19981651,80014.702.15$6,304
Dec 19973281,84216.322.41$9,794
Nov 19971681,82018.193.09$8,677
Oct 19973301,83919.253.15$12,145
Sep 19973431,22017.742.95$9,690
Aug 19971792,31717.862.55$9,116
Jul 19973212,98017.582.25$12,339
Jun 19973403,49717.242.26$13,755
May 19973522,63818.972.31$12,767
Apr 19971742,62817.882.08$8,585
Mar 19973372,85018.951.94$11,913
Feb 19973172,60520.492.21$12,242
Jan 19975062,49023.483.54$20,695
Dec 19965233,40323.32$12,196
Nov 1996073621.97$0
Oct 19960023.31$0
Sep 19961781222.22$3,955
Aug 19961751220.26$3,546
Jul 19961831219.55$3,578
Jun 19966981218.73$13,074
May 1996729619.43$136
Apr 19961281,62921.51$2,753
Mar 19965021,53019.38$9,729
Feb 199601,39416.98$0
Jan 19962691,59517.07$4,592
Dec 19952761,67617.19$4,744
Nov 19952751,40416.00$4,400
Oct 19952541,87915.43$3,919
Sep 19955342,09516.18$8,640
Aug 199501,84715.92$0
Jul 19955142,12915.24$7,833
Jun 199502,04016.41$0
May 19952692,47317.56$4,724
Apr 19953932,17517.73$6,968
Mar 19952482,51416.44$4,077
Feb 19952502,34716.58$4,145
Jan 19954892,72315.92$7,785
Dec 19942592,93015.03$3,893
Nov 19947663,16015.90$12,179
Oct 199403,20215.58$0
Sep 19945063,77915.29$7,737
Aug 1994644,21616.13$1,032
Jul 19941634,56417.56$2,862
Jun 1994974,13317.09$1,658
May 1994653,01815.88$1,032
Apr 1994652,84814.14$919
Mar 1994963,77112.46$1,196
Feb 19945584,41512.50$6,975
Jan 19942805,87412.66$3,545
Dec 19931833,66612.33$2,256
Nov 19931834,48414.49$2,652
Oct 19931845,91815.85$2,916
Sep 19932805,54715.03$4,208
Aug 19933706,36515.66$5,794
Jul 19933677,52515.46$5,674
Jun 19933697,71616.79$6,196
May 19933688,55817.68$6,506
Apr 19934614,43718.05$8,321
Mar 19933722,09218.14$6,748
Feb 19933712,39817.90$6,641
Jan 19933743,98316.93$6,332

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                  116 bbl  × $106.41 =    $12,344
Casinghead gas         0 Mcf  × $  3.05 =         $0

────────────────────────────────────────────────────
Month total                                  $12,344

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/33238 is the state's own key, not one this site invented.