CHALK, G.O.-E-

Operated by CITATION OIL & GAS CORP. (P-5 154235) in the HOWARD GLASSCOCK (CONSOLIDATED) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 41219District 08Field 42971200Hydrogen sulphide fieldOilCasinghead gasSaveExport
Value, all time
$23.1 M
Dec 2011 – May 2026
Value, last 12 filed months
$1.2 M
at the published price for each month
Months reported
174
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 231 leases and 2,805 wells, and the rule below applies to all of them.

Discovered
2011-11-22
as the register files it
Field class
Oil
the register's own label
Between wells
0 ft
minimum
From a lease line
200 ft
minimum

A drilling unit in this field needs at least 5 acres. The field rule took effect on 2014-01-07.

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: P-15'S, ACRES LIST, AND LEASE PLATS REQUIRED.

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
OilDisposition322,677 bbl$22,804,440
Casinghead gasProduction91,881 Mcf$307,133
Total$23,111,573

Wells on this lease (21)

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 32.1057, -101.2729. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.4 miles.

32.10635, -101.27264 · 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
19.0%
4 of 21 wells
With a plug date
19.0%
4 of 21 wells
Median depth
3,195 ft
21 wells filed one
Completion to plug
16.2 years
median over 4 wells

What the state filed about each well

On the RRC proration schedule
419.0%
A plug date is filed
419.0%
BothOn the schedule and plugged. Neither fact cancels the other.
419.0%
NeitherNo plug date, and not on the schedule.
1781.0%

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

Total depth in feet, 21 of 21 wells. Median 3,195 ft, with the middle half between 2,750 and 3,300 ft; the shallowest is 1,700 ft and the deepest 6,375 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, 20 of 21 wells, Jul 1968 – Mar 2026. This is the LAST completion filed on each wellbore, not the first — a well recompleted in 2019 counts once, in the 2010s.

Completions filed
Jul 1968 – Mar 2026
20 of 21 wells; 1 filed none
Plug dates filed
Feb 2015 – Mar 2021
4 of 21 wells; 17 filed none

Last completion to plug: a median of 16.2 years across the 4 wells that filed both dates, with the middle half between 16 months and 33.3 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

21 wells

42-227009863A3,165 ft
42-22732189193,150 ftMar 2026
42-22733026223,950 ftDec 2024
42-2271007713W1,700 ftJan 2022
42-22734434263,300 ftSep 2020Mar 2021Yes
42-22736467304,445 ftMay 2015Dec 2016Yes
42-2270251951,808 ftOct 2014
42-22737314314,312 ftMay 2013
42-22734330252,025 ftDec 2012
42-22734439293,300 ftOct 2010
42-22733033234,051 ftAug 2010
42-22734262276,375 ftApr 2010
42-2273443716A3,300 ftOct 1989
42-22734318243,258 ftJan 1989
42-2271007814W1,880 ftNov 1988Jul 2019Yes
42-2270251843,181 ftNov 1987
42-2270050673,215 ftAug 1984
42-22732707213,102 ftAug 1982
42-2270050883,195 ftOct 1973Feb 2015Yes
42-22710931162,736 ftAug 1968
42-22710934152,750 ftJul 1968

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 (174)

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

174 months

May 20261,291290106.413.05$138,259
Apr 20261,44627898.932.87$143,851
Mar 20261,42927389.753.15$129,113
Feb 20261,28734063.503.75$83,000
Jan 20261,30066859.138.00$82,212
Dec 20251,55579556.664.41$91,615
Nov 20251,37960458.593.93$83,167
Oct 20251,41139159.383.30$85,077
Sep 20251,37843762.743.08$87,800
Aug 20251,43748663.933.01$93,333
Jul 20251,69350566.743.32$114,665
Jun 20251,50548466.483.13$101,567
May 20251,45840560.553.23$89,591
Apr 20251,29442362.363.54$82,193
Mar 20251,54649567.704.27$106,777
Feb 20251,40539670.884.34$101,305
Jan 20251,8131,80074.324.28$142,444
Dec 20241,9671,07868.993.12$139,068
Nov 20241,52751969.052.20$106,580
Oct 20241,71147471.372.28$123,195
Sep 20241,66148169.612.36$116,759
Aug 20241,72647575.632.06$131,518
Jul 20241,69835279.932.15$136,477
Jun 20241,72842878.082.63$136,050
May 20241,74942078.812.20$138,762
Apr 20241,68826884.451.66$142,996
Mar 20241,94130380.301.55$156,330
Feb 20241,64438276.091.78$125,773
Jan 20241,2265373.023.30$89,697
Dec 20231,32335071.262.61$95,191
Nov 20231,59141777.892.81$125,094
Oct 20231,51056885.443.09$130,768
Sep 20231,46647189.042.74$131,821
Aug 20231,68715180.522.67$136,241
Jul 20231,61161274.852.64$122,200
Jun 20231,4387168.962.26$99,325
May 20231,44518470.622.23$102,456
Apr 20231,49325778.122.24$117,208
Mar 20231,55731972.852.39$114,191
Feb 20231,43522475.112.47$108,335
Jan 20231,4495276.533.39$111,068
Dec 20221,39326176.415.73$107,934
Nov 20221,42138785.005.65$122,970
Oct 20221,53148687.185.86$136,322
Sep 20221,53660384.888.16$135,298
Aug 20221,4839094.529.13$140,995
Jul 20221,525513101.587.54$158,779
Jun 20221,641549115.097.98$193,242
May 20221,438407109.378.43$160,706
Apr 20221,552441104.226.84$164,765
Mar 20221,636563108.885.08$180,986
Feb 20221,50935191.054.86$139,100
Jan 20221,53347781.844.54$127,625
Dec 20211,66350471.323.90$120,570
Nov 20211,51632477.435.24$119,081
Oct 20211,58138779.795.71$128,359
Sep 20211,46648669.865.35$105,015
Aug 20211,52761266.024.22$103,396
Jul 20211,63660770.783.98$118,213
Jun 20211,69651469.493.38$119,593
May 20211,88433363.483.02$120,601
Apr 20211,99521660.362.76$121,014
Mar 20211,99827061.302.72$123,211
Feb 20211,28624357.805.55$75,679
Jan 20211,70443750.412.81$87,127
Dec 20201,72127044.642.68$77,548
Nov 20201,74820738.772.71$68,330
Oct 20201,78216236.972.48$66,282
Sep 20201,80425237.091.99$67,412
Aug 20201,92739539.982.39$77,984
Jul 20201,81233338.371.83$70,134
Jun 20202,01151334.901.69$71,051
May 20201,45545916.921.81$25,452
Apr 20201,68333314.751.80$25,425
Mar 20201,84558530.341.86$57,063
Feb 20201,54444749.881.98$77,900
Jan 20201,59150957.252.09$92,151
Dec 20191,95049559.012.30$116,210
Nov 20191,87748655.302.75$105,135
Oct 20191,64758753.472.42$89,485
Sep 20191,78260555.052.66$99,707
Aug 20191,67465753.112.30$90,420
Jul 20191,64947256.272.46$93,950
Jun 20191,65263452.782.49$88,772
May 20191,69157858.482.74$100,474
Apr 20191,42111562.632.75$89,314
Mar 20191,43530256.803.06$82,433
Feb 20191,40943650.852.79$72,865
Jan 20191,21553646.033.23$57,657
Dec 20181,60959446.594.19$77,449
Nov 20181,54049552.934.24$83,610
Oct 20181,58737861.443.40$98,790
Sep 20181,65766659.543.11$100,728
Aug 20181,64562659.403.07$99,633
Jul 20181,77965765.142.93$117,810
Jun 20181,51563060.183.08$93,111
May 20181,59246865.382.90$105,443
Apr 20181,00753563.842.90$65,839
Mar 20181,44253661.222.79$89,773
Feb 201887854761.782.77$55,756
Jan 20181,01363962.874.01$66,249
Dec 201798363657.272.92$58,155
Nov 20171,08657955.423.12$61,992
Oct 20171,25778149.292.98$64,288
Sep 20171,07434547.523.09$52,102
Aug 20171,42495845.373.00$67,485
Jul 20171,63593843.873.09$74,623
Jun 20171,84094342.493.09$81,093
May 20171,40386545.373.26$66,477
Apr 20171,20279847.933.21$60,175
Mar 20171,32884746.772.98$64,638
Feb 20171,35485550.452.95$70,834
Jan 20171,3161,68049.413.42$70,767
Dec 20161,5791,71448.763.72$83,373
Nov 20161,57456142.492.64$68,363
Oct 20161,37194746.193.09$66,253
Sep 20161,5721,52341.553.10$70,039
Aug 20161,6751,24641.442.92$73,056
Jul 20161,80143741.622.92$76,236
Jun 20161,57939345.352.69$72,663
May 20162,21492142.521.99$95,973
Apr 20161,92034236.561.99$70,876
Mar 20161,572033.011.79$51,892
Feb 20161,43743726.472.06$38,939
Jan 20161,8211,24227.352.36$52,741
Dec 20152,0421,07332.362.00$68,227
Nov 20152,2821,11738.792.17$90,940
Oct 20152,5041,31643.552.43$112,243
Sep 20152,00758242.992.76$87,886
Aug 20151,618040.162.87$64,979
Jul 20151,587048.152.95$76,414
Jun 20151,423056.152.88$79,901
May 20151,983055.212.96$109,481
Apr 20152,17017949.822.71$108,594
Mar 20151,8603,84742.892.93$91,065
Feb 20151,985044.662.98$88,650
Jan 20152,776043.433.10$120,562
Dec 20142,465054.693.59$134,811
Nov 20142,612070.464.25$184,042
Oct 20143,075078.303.90$240,773
Sep 20143,212086.164.05$276,746
Aug 20142,553089.394.04$228,213
Jul 20142,842096.564.18$274,424
Jun 20142,944098.164.74$288,983
May 20143,024094.734.73$286,464
Apr 20142,64948495.944.81$256,473
Mar 20142,3541,13295.895.06$231,449
Feb 20141,88649497.406.19$186,755
Jan 20142,291090.404.86$207,106
Dec 20131,933091.824.35$177,488
Nov 20131,690088.853.74$150,157
Oct 20132,323097.423.78$226,307
Sep 20132,8121,180104.113.72$297,144
Aug 20133,8002,140104.253.52$403,688
Jul 20133,194914102.523.72$330,847
Jun 20132,9641,58794.403.93$286,044
May 20134,4371,39094.834.15$426,528
Apr 20133,30151293.964.28$312,355
Mar 20131,6751,21193.623.91$161,552
Feb 20131,5881,21191.233.42$149,015
Jan 20132,26350691.603.42$209,021
Dec 20123,2449186.773.42$281,793
Nov 20123,4503586.953.62$300,104
Oct 20122,81642489.383.40$253,136
Sep 20122,69061194.672.92$256,445
Aug 20122,86847792.662.91$267,136
Jul 20122,68265885.133.02$230,306
Jun 20122,66199979.822.52$214,918
May 20122,5361,10891.612.49$235,080
Apr 20124,385676101.652.00$447,085
Mar 20123,604367105.052.22$379,416
Feb 20123,067169101.102.57$310,508
Jan 20123,6454398.092.73$357,656
Dec 20112,25118196.873.24$218,641

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                1,291 bbl  × $106.41 =   $137,375
Casinghead gas       290 Mcf  × $  3.05 =       $883

────────────────────────────────────────────────────
Month total                                 $138,259

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/41219 is the state's own key, not one this site invented.