CHALK, G. O. -B-

Operated by CONOCOPHILLIPS COMPANY (P-5 172232) 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 18988District 08Field 42971332Hydrogen sulphide fieldNGPA filingOilCasinghead gasSaveExport
Value, all time
$8.3 M
Jan 1993 – Apr 2012
Value, last 12 filed months
$591 k
at the published price for each month
Months reported
232
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.

Severance-tax incentive filings

Applications the operator filed to have this lease's gas taxed at a reduced state rate. A filing is an application, and this page never calls one a reduction that was granted.

ProgrammeFilingsWith an approval dateDatedDocket
NGPA7none

This says nothing about a royalty. A severance tax is charged to the operator. Whether a reduced rate reaches a royalty owner depends on the wording of the lease instrument, which is a private contract this site does not hold.

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
OilDisposition241,949 bbl$8,242,454
Casinghead gasProduction37,294 Mcf$96,874
Total$8,339,328

14,288 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 (12)

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 32.0833, -101.3119. A lease has no coordinate of its own — that point is the mean of its wells, and they span 47.1 miles, so treat it as the lease's centre and not as its location.

31.89057, -101.64052 · 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
91.7%
11 of 12 wells
With a plug date
50.0%
6 of 12 wells
Median depth
3,100 ft
10 wells filed one
Completion to plug
23.9 years
median over 5 wells

What the state filed about each well

On the RRC proration schedule
1191.7%
A plug date is filed
650.0%
BothOn the schedule and plugged. Neither fact cancels the other.
650.0%
NeitherNo plug date, and not on the schedule.
18.3%

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, 10 of 12 wells. Median 3,100 ft, with the middle half between 3,055 and 3,180 ft; the shallowest is 2,921 ft and the deepest 11,845 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, 9 of 12 wells, Feb 1972 – Nov 2015. This is the LAST completion filed on each wellbore, not the first — a well recompleted in 2019 counts once, in the 2010s.

Completions filed
Feb 1972 – Nov 2015
9 of 12 wells; 3 filed none
Plug dates filed
May 1996 – May 2017
6 of 12 wells; 6 filed none

Last completion to plug: a median of 23.9 years across the 5 wells that filed both dates, with the middle half between 19.0 years and 24.3 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

12 wells

42-2270049733,068 ftMay 2017Yes
42-227005162Yes
42-227100565Yes
42-22732159163,206 ftNov 2015Yes
42-32939605411,845 ftOct 2014
42-22733041173,100 ftApr 1988Yes
42-22730269113,900 ftApr 1987Mar 2011Yes
42-22734128183,100 ftApr 1987Aug 2005Yes
42-2270252212,921 ftFeb 1987Yes
42-22731165153,100 ftMay 1977May 1996Yes
42-22730342143,050 ftFeb 1972Aug 2005Yes
42-22730341133,050 ftFeb 1972May 1996Yes

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 (232)

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

232 months

Apr 201200101.652.00$0
Mar 201200105.052.22$0
Feb 201200101.102.57$0
Jan 20120098.092.73$0
Dec 20110096.873.24$0
Nov 201187020395.723.31$83,949
Oct 201195417884.983.65$81,720
Sep 201177811183.623.99$65,499
Aug 201187210383.404.15$73,152
Jul 201194011094.144.52$88,989
Jun 20111,007092.904.64$93,550
May 20111,057898.134.40$103,759
Apr 20111,28827105.964.33$136,593
Mar 20111,0383396.364.06$100,156
Feb 20114196685.644.18$36,159
Jan 201152711986.504.59$46,132
Dec 20105695285.734.35$49,006
Nov 20105908280.843.80$48,007
Oct 201064614878.103.51$50,972
Sep 201057013772.633.98$41,944
Aug 201056219773.684.42$42,279
Jul 201053919772.554.74$40,038
Jun 201053521470.364.91$38,693
May 201064818671.124.24$46,874
Apr 20106109981.694.12$50,239
Mar 201071119178.394.39$56,574
Feb 201073216773.585.44$54,769
Jan 201068420774.365.96$52,097
Dec 200974819371.445.48$54,495
Nov 200970317974.593.75$53,108
Oct 200974913472.544.11$54,883
Sep 20096818865.543.06$44,902
Aug 200980011867.423.22$54,316
Jul 20097828461.133.46$48,095
Jun 200980511066.163.90$53,687
May 20096896754.743.93$37,979
Apr 200961010046.773.59$28,888
Mar 200975210742.144.06$32,124
Feb 20097229832.814.63$24,143
Jan 20097869835.865.37$28,712
Dec 20087614937.105.98$28,526
Nov 20087383255.496.86$41,171
Oct 20087625075.246.92$57,679
Sep 200876845101.767.88$78,506
Aug 200880455114.228.48$92,299
Jul 200864145131.0811.39$84,535
Jun 200832826131.3313.03$43,415
May 200858851123.1711.57$73,014
Apr 200860258110.3110.45$67,013
Mar 200861559101.909.66$63,239
Feb 20086297092.538.77$58,815
Jan 20088159090.388.21$74,398
Dec 200786410588.337.30$77,084
Nov 20078818591.677.29$81,381
Oct 20078368082.856.92$69,816
Sep 20078578975.846.24$65,551
Aug 20078829069.066.39$61,486
Jul 20078495570.906.39$60,545
Jun 20078606362.007.55$53,796
May 20079116058.747.85$53,983
Apr 20078668059.617.81$52,247
Mar 20078896956.927.30$51,106
Feb 20077884955.108.22$43,821
Jan 20079015850.306.73$45,710
Dec 20069196356.656.92$52,497
Nov 20068787254.207.62$48,136
Oct 20069647754.906.01$53,387
Sep 20069088060.085.04$54,956
Aug 20069208068.717.34$63,800
Jul 20069616169.376.34$67,051
Jun 20068093666.286.38$53,850
May 20069002966.016.42$59,595
Apr 20068112264.397.36$52,382
Mar 20068523856.707.08$48,578
Feb 200674013257.597.75$43,640
Jan 200684912860.598.93$52,584
Dec 20056269054.9413.42$35,600
Nov 200569411854.6910.59$39,204
Oct 200576910258.3413.80$46,271
Sep 20057356661.4512.08$45,963
Aug 2005767061.519.80$47,178
Jul 20057989655.697.84$45,194
Jun 20057896252.337.38$41,746
May 20059199845.226.65$42,209
Apr 200582111049.207.36$41,203
Mar 20051,14910450.377.15$58,619
Feb 20058828745.226.31$40,433
Jan 20051,0414943.166.32$45,239
Dec 20041,04110839.866.75$42,223
Nov 20041,10811645.286.33$50,905
Oct 20041,17811849.706.52$59,315
Sep 20041,20312743.245.28$52,689
Aug 20041,14213042.375.55$49,108
Jul 20041,43513638.286.08$55,759
Jun 200495612436.106.43$35,309
May 200485213037.486.49$32,777
Apr 20041,02313334.475.86$36,042
Mar 200474113434.365.53$26,202
Feb 200494911932.455.51$31,451
Jan 200489612732.036.30$29,499
Dec 200391113430.266.30$28,411
Nov 200389813728.804.60$26,492
Oct 200398612828.174.76$28,385
Sep 20031,20514526.314.75$32,392
Aug 20031,19215629.765.13$36,274
Jul 20031,14915929.415.17$34,614
Jun 20031,12615828.565.98$33,104
May 20031,11515526.595.97$30,574
Apr 200386815426.675.41$23,982
Mar 200391715931.146.10$29,525
Feb 200383714033.487.93$29,132
Jan 200387413530.315.58$27,245
Dec 200294313426.914.85$26,027
Nov 2002987024.664.14$24,339
Oct 200278311526.464.23$21,205
Sep 200283611027.443.64$23,340
Aug 20021,03114025.963.16$27,208
Jul 200284813524.583.06$21,257
Jun 200272813523.733.34$17,726
May 200294714524.663.58$23,873
Apr 200281815023.653.51$19,873
Mar 200277411522.003.10$17,385
Feb 2002856018.222.38$15,596
Jan 200290012517.172.38$15,750
Dec 200179111616.932.36$13,666
Nov 200165510718.072.41$12,093
Oct 200195815019.782.53$19,329
Sep 200195014524.262.25$23,373
Aug 200182914524.873.05$21,060
Jul 200176114523.933.20$18,674
Jun 200173414524.563.82$18,582
May 200187013525.524.31$22,784
Apr 200198515024.685.34$25,110
Mar 200195313524.545.38$24,112
Feb 20016737527.755.77$19,108
Jan 2001631027.478.40$17,334
Dec 2000620026.889.12$16,666
Nov 2000612032.215.66$19,713
Oct 20001,0817131.235.15$34,125
Sep 20001,005131.875.19$32,035
Aug 20001,2021029.644.54$35,673
Jul 20001,172628.534.09$33,462
Jun 200089614529.304.40$26,890
May 200079415527.263.68$22,215
Apr 200094119324.513.12$23,665
Mar 200088314628.422.86$25,512
Feb 200064913227.622.73$18,285
Jan 200064512625.272.48$16,612
Dec 199986814024.282.42$21,414
Nov 19994924123.192.43$11,509
Oct 199963217420.982.80$13,747
Sep 19991,09326721.752.62$24,472
Aug 199995320419.262.88$18,941
Jul 199991313417.892.37$16,651
Jun 19991,03110315.942.36$16,677
May 19999138015.792.32$14,602
Apr 19999819515.102.21$15,023
Mar 19998508012.471.84$10,747
Feb 19997291309.981.82$7,512
Jan 19991,06718610.381.90$11,429
Dec 19981,2792819.201.77$12,265
Nov 199889630610.892.19$10,426
Oct 19981,07632512.421.97$14,004
Sep 19981,20036612.592.08$15,870
Aug 19981,33537611.301.91$15,803
Jul 19981,03836011.742.24$12,992
Jun 19981,28235011.242.24$15,193
May 19981,16827212.622.21$15,340
Apr 19981,20729213.042.51$16,471
Mar 19981,30630112.802.31$17,412
Feb 19981,16124613.952.30$16,762
Jan 19981,11226214.702.15$16,911
Dec 19971,62827116.322.41$27,222
Nov 19971,33029818.193.09$25,113
Oct 19971,24837019.253.15$25,189
Sep 19971,35734117.742.95$25,081
Aug 19971,29234417.862.55$23,954
Jul 19971,35033017.582.25$24,474
Jun 19971,33628117.242.26$23,667
May 19971,21825918.972.31$23,703
Apr 19971,27623817.882.08$23,311
Mar 19971,38726618.951.94$26,799
Feb 19971,3162420.492.21$27,018
Jan 19971,2779023.483.54$30,303
Dec 19961,36520823.32$31,832
Nov 19961,27728221.97$28,056
Oct 19961,40125223.31$32,657
Sep 19961,23326422.22$27,397
Aug 19961,55228420.26$31,444
Jul 19961,57934019.55$30,869
Jun 19961,70928218.73$32,010
May 19961,88027219.43$36,528
Apr 19961,47231421.51$31,663
Mar 19961,49828219.38$29,031
Feb 19961,36331216.98$23,144
Jan 19961,48334817.07$25,315
Dec 19951,50341417.19$25,837
Nov 19951,33941616.00$21,424
Oct 19951,46964615.43$22,667
Sep 19951,52541616.18$24,675
Aug 19951,62943815.92$25,934
Jul 19951,49241715.24$22,738
Jun 19951,43039416.41$23,466
May 19951,72031517.56$30,203
Apr 19951,58330517.73$28,067
Mar 19951,64131516.44$26,978
Feb 19951,264116.58$20,957
Jan 19951,22328115.92$19,470
Dec 19941,67829915.03$25,220
Nov 19941,92530815.90$30,608
Oct 19941,67331715.58$26,065
Sep 19941,53129415.29$23,409
Aug 19941,57331516.13$25,372
Jul 19941,61028317.56$28,272
Jun 19941,72026417.09$29,395
May 19941,84721115.88$29,330
Apr 19941,77723314.14$25,127
Mar 19942,03129712.46$25,306
Feb 19941,80025712.50$22,500
Jan 19942,17027412.66$27,472
Dec 19932,15834212.33$26,608
Nov 19931,73624914.49$25,155
Oct 19931,85127915.85$29,338
Sep 19931,93829915.03$29,128
Aug 19932,22024715.66$34,765
Jul 19932,13716915.46$33,038
Jun 19931,80528516.79$30,306
May 19932,13729217.68$37,782
Apr 19932,10527618.05$37,995
Mar 19932,02630018.14$36,752
Feb 19931,98427617.90$35,514
Jan 19932,03812416.93$34,503

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.

Nov 2011 — as filed, then multipliedworked
Oil                  870 bbl  × $ 95.72 =    $83,276
Casinghead gas       203 Mcf  × $  3.31 =       $672

────────────────────────────────────────────────────
Month total                                  $83,949

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/18988 is the state's own key, not one this site invented.