CHALK, OTIS

Operated by SAHARA OPERATING COMPANY (P-5 743279) in the HOWARD-GLASSCOCK (GLORIETA) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 20660District 08Field 42971332Hydrogen sulphide fieldOilCasinghead gasSaveExport
Value, all time
$337 k
Jan 1993 – Dec 2018
Value, last 12 filed months
$0
at the published price for each month
Months reported
312
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 131 leases and 850 wells, and the rule below applies to all of them.

Discovered
1925-12-31
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 10 acres.

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: 11/22/11.

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
OilDisposition9,838 bbl$337,016
Casinghead gasProduction21 Mcf$0
Total$337,016

21 Mcf of this lease's gas, across 21 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 (7)

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 32.1416, -101.2446. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.5 miles.

32.14199, -101.24473 · 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
100.0%
7 of 7 wells
With a plug date
57.1%
4 of 7 wells
Median depth
3,007 ft
6 wells filed one
Completion to plug
30.6 years
median over 2 wells

What the state filed about each well

On the RRC proration schedule
7100.0%
A plug date is filed
457.1%
BothOn the schedule and plugged. Neither fact cancels the other.
457.1%
NeitherNo plug date, and not on the schedule.
00.0%

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

Between 2,976 and 3,010 ft, median 3,007 ft, over the 6 wells that filed a depth.

Completions filed
Oct 1973 – Sep 1996
4 of 7 wells; 3 filed none
Plug dates filed
Oct 1980 – Aug 2023
4 of 7 wells; 3 filed none

Last completion to plug: a median of 30.6 years across the 2 wells that filed both dates, with the middle half between 28.8 years and 32.4 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

7 wells

42-2270239132,976 ftOct 1980Yes
42-2270249512,999 ftOct 1980Yes
42-2271086816Yes
42-227304792W3,010 ftSep 1996Aug 2023Yes
42-2273048155W3,008 ftOct 1973Jan 2008Yes
42-2273048256W3,006 ftOct 1973Yes
42-227304843W3,008 ftOct 1973Yes

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 (312)

Volume × price = value, one row per cycle. The price columns are the same series published on the prices page — nothing here is modelled.

312 months

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 20150049.822.71$0
Mar 20150042.892.93$0
Feb 20150044.662.98$0
Jan 20150043.433.10$0
Dec 20140054.693.59$0
Nov 20140070.464.25$0
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 20140097.406.19$0
Jan 20140090.404.86$0
Dec 20130091.824.35$0
Nov 20130088.853.74$0
Oct 20130097.423.78$0
Sep 201300104.113.72$0
Aug 201300104.253.52$0
Jul 201300102.523.72$0
Jun 20130094.403.93$0
May 20130094.834.15$0
Apr 20130093.964.28$0
Mar 20130093.623.91$0
Feb 20130091.233.42$0
Jan 20130091.603.42$0
Dec 20120086.773.42$0
Nov 20120086.953.62$0
Oct 20120089.383.40$0
Sep 20120094.672.92$0
Aug 20120092.662.91$0
Jul 20120085.133.02$0
Jun 20120079.822.52$0
May 20120091.612.49$0
Apr 201200101.652.00$0
Mar 201200105.052.22$0
Feb 201200101.102.57$0
Jan 20120098.092.73$0
Dec 201120096.873.24$1,937
Nov 201132095.723.31$3,063
Oct 201131084.983.65$2,634
Sep 201134083.623.99$2,843
Aug 201159083.404.15$4,921
Jul 201111094.144.52$1,036
Jun 201144092.904.64$4,088
May 201123098.134.40$2,257
Apr 2011290105.964.33$3,073
Mar 201138096.364.06$3,662
Feb 201122085.644.18$1,884
Jan 201128086.504.59$2,422
Dec 201032085.734.35$2,743
Nov 201023080.843.80$1,859
Oct 201033078.103.51$2,577
Sep 201031072.633.98$2,252
Aug 201034073.684.42$2,505
Jul 201034072.554.74$2,467
Jun 201037070.364.91$2,603
May 201034071.124.24$2,418
Apr 201027081.694.12$2,206
Mar 201030078.394.39$2,352
Feb 201027073.585.44$1,987
Jan 201029074.365.96$2,156
Dec 200934071.445.48$2,429
Nov 200924074.593.75$1,790
Oct 200937072.544.11$2,684
Sep 200939065.543.06$2,556
Aug 200931067.423.22$2,090
Jul 200932061.133.46$1,956
Jun 200934066.163.90$2,249
May 200933054.743.93$1,806
Apr 200933046.773.59$1,543
Mar 200937042.144.06$1,559
Feb 200937032.814.63$1,214
Jan 200940035.865.37$1,434
Dec 200837037.105.98$1,373
Nov 200837055.496.86$2,053
Oct 200836075.246.92$2,709
Sep 2008410101.767.88$4,172
Aug 2008330114.228.48$3,769
Jul 2008350131.0811.39$4,588
Jun 2008310131.3313.03$4,071
May 2008370123.1711.57$4,557
Apr 2008370110.3110.45$4,081
Mar 2008290101.909.66$2,955
Feb 200832092.538.77$2,961
Jan 200838090.388.21$3,434
Dec 200738088.337.30$3,357
Nov 200732091.677.29$2,933
Oct 200741082.856.92$3,397
Sep 200734075.846.24$2,579
Aug 200739069.066.39$2,693
Jul 200741070.906.39$2,907
Jun 200728062.007.55$1,736
May 200733058.747.85$1,938
Apr 200729059.617.81$1,729
Mar 200728056.927.30$1,594
Feb 200722055.108.22$1,212
Jan 200730050.306.73$1,509
Dec 200630056.656.92$1,700
Nov 200634054.207.62$1,843
Oct 200632054.906.01$1,757
Sep 200631060.085.04$1,862
Aug 200628068.717.34$1,924
Jul 200632069.376.34$2,220
Jun 200632066.286.38$2,121
May 200639066.016.42$2,574
Apr 200629064.397.36$1,867
Mar 200638056.707.08$2,155
Feb 200630057.597.75$1,728
Jan 200634060.598.93$2,060
Dec 200527054.9413.42$1,483
Nov 200534054.6910.59$1,859
Oct 200530058.3413.80$1,750
Sep 200531061.4512.08$1,905
Aug 200531061.519.80$1,907
Jul 200529055.697.84$1,615
Jun 200535052.337.38$1,832
May 200522045.226.65$995
Apr 200527049.207.36$1,328
Mar 200540050.377.15$2,015
Feb 200524045.226.31$1,085
Jan 200532043.166.32$1,381
Dec 200428039.866.75$1,116
Nov 200427045.286.33$1,223
Oct 200431049.706.52$1,541
Sep 200429043.245.28$1,254
Aug 200431042.375.55$1,313
Jul 200426038.286.08$995
Jun 200429036.106.43$1,047
May 200433037.486.49$1,237
Apr 20040034.475.86$0
Mar 200438034.365.53$1,306
Feb 200423032.455.51$746
Jan 200430032.036.30$961
Dec 200338030.266.30$1,150
Nov 200329028.804.60$835
Oct 200333028.174.76$930
Sep 200334026.314.75$895
Aug 200331029.765.13$923
Jul 200334029.415.17$1,000
Jun 200331028.565.98$885
May 200335026.595.97$931
Apr 200333026.675.41$880
Mar 200339031.146.10$1,214
Feb 200329033.487.93$971
Jan 200334030.315.58$1,031
Dec 200231026.914.85$834
Nov 200234024.664.14$838
Oct 200233026.464.23$873
Sep 200237027.443.64$1,015
Aug 200237025.963.16$961
Jul 200237024.583.06$909
Jun 200233023.733.34$783
May 200237024.663.58$912
Apr 200232023.653.51$757
Mar 200233022.003.10$726
Feb 200231018.222.38$565
Jan 200240017.172.38$687
Dec 200121016.932.36$356
Nov 200133018.072.41$596
Oct 200136019.782.53$712
Sep 200141024.262.25$995
Aug 200134024.873.05$846
Jul 200141023.933.20$981
Jun 200131024.563.82$761
May 200139025.524.31$995
Apr 200139024.685.34$963
Mar 200126024.545.38$638
Feb 200131027.755.77$860
Jan 200145027.478.40$1,236
Dec 200030026.889.12$806
Nov 200034032.215.66$1,095
Oct 200037031.235.15$1,156
Sep 200030031.875.19$956
Aug 200037029.644.54$1,097
Jul 200031028.534.09$884
Jun 200034029.304.40$996
May 200038027.263.68$1,036
Apr 200037024.513.12$907
Mar 200042028.422.86$1,194
Feb 200041027.622.73$1,132
Jan 200043025.272.48$1,087
Dec 199934024.282.42$826
Nov 199963023.192.43$1,461
Oct 199920020.982.80$420
Sep 199938021.752.62$827
Aug 199941019.262.88$790
Jul 199941017.892.37$733
Jun 199942015.942.36$669
May 199939015.792.32$616
Apr 199940015.102.21$604
Mar 199941012.471.84$511
Feb 19993409.981.82$339
Jan 199932010.381.90$332
Dec 19983009.201.77$276
Nov 199831010.892.19$338
Oct 199838012.421.97$472
Sep 199840012.592.08$504
Aug 199832011.301.91$362
Jul 199853011.742.24$622
Jun 199823011.242.24$259
May 199839012.622.21$492
Apr 199845013.042.51$587
Mar 199844012.802.31$563
Feb 199836013.952.30$502
Jan 199841014.702.15$603
Dec 199761016.322.41$996
Nov 199721018.193.09$382
Oct 199766019.253.15$1,271
Sep 199723017.742.95$408
Aug 199738017.862.55$679
Jul 199759017.582.25$1,037
Jun 199739017.242.26$672
May 199745018.972.31$854
Apr 199763017.882.08$1,126
Mar 199747018.951.94$891
Feb 199745020.492.21$922
Jan 199741023.483.54$963
Dec 199640023.32$933
Nov 199631021.97$681
Oct 199643023.31$1,002
Sep 199647022.22$1,044
Aug 199646020.26$932
Jul 199641019.55$802
Jun 199645018.73$843
May 199659019.43$1,146
Apr 199642021.51$903
Mar 199657019.38$1,105
Feb 199645016.98$764
Jan 199641017.07$700
Dec 199553017.19$911
Nov 199546016.00$736
Oct 199546015.43$710
Sep 199523016.18$372
Aug 199544015.92$700
Jul 199547015.24$716
Jun 199523016.41$377
May 199542017.56$738
Apr 199546017.73$816
Mar 199555016.44$904
Feb 199560016.58$995
Jan 199557015.92$907
Dec 199483015.03$1,247
Nov 199447015.90$747
Oct 1994144015.58$2,244
Sep 199495115.29$1,453
Aug 199489116.13$1,436
Jul 199495117.56$1,668
Jun 1994140117.09$2,393
May 199499115.88$1,572
Apr 199489114.14$1,258
Mar 1994137112.46$1,707
Feb 199492112.50$1,150
Jan 199490112.66$1,139
Dec 199391112.33$1,122
Nov 1993133114.49$1,927
Oct 1993142115.85$2,251
Sep 1993100115.03$1,503
Aug 1993103115.66$1,613
Jul 1993156115.46$2,412
Jun 1993151116.79$2,535
May 199392117.68$1,627
Apr 1993125118.05$2,256
Mar 199382118.14$1,487
Feb 199380117.90$1,432
Jan 1993126116.93$2,133

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.

Dec 2011 — as filed, then multipliedworked
Oil                   20 bbl  × $ 96.87 =     $1,937
Casinghead gas         0 Mcf  × $  3.24 =         $0

────────────────────────────────────────────────────
Month total                                   $1,937

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/20660 is the state's own key, not one this site invented.