CHALK, MARY

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 19033District 08Field 42971332Hydrogen sulphide fieldNGPA filingOilCasinghead gasSaveExport
Value, all time
$19.0 M
Jan 1993 – Apr 2012
Value, last 12 filed months
$888 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
NGPA8none

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
OilDisposition642,522 bbl$18,484,435
Casinghead gasProduction187,939 Mcf$550,596
Total$19,035,030

60,268 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 (31)

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 32.1141, -101.2666. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.9 miles.

32.11384, -101.26750 · 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%
31 of 31 wells
With a plug date
45.2%
14 of 31 wells
Median depth
3,105 ft
28 wells filed one
Completion to plug
9.1 years
median over 11 wells

What the state filed about each well

On the RRC proration schedule
31100.0%
A plug date is filed
1445.2%
BothOn the schedule and plugged. Neither fact cancels the other.
1445.2%
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

Total depth in feet, 28 of 31 wells. Median 3,105 ft, with the middle half between 3,100 and 3,200 ft; the shallowest is 2,983 ft and the deepest 3,900 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, 25 of 31 wells, Jan 1973 – Jan 2025. This is the LAST completion filed on each wellbore, not the first — a well recompleted in 2019 counts once, in the 2010s.

Completions filed
Jan 1973 – Jan 2025
25 of 31 wells; 6 filed none
Plug dates filed
Feb 1947 – Apr 2024
14 of 31 wells; 17 filed none

Last completion to plug: a median of 9.1 years across the 11 wells that filed both dates, with the middle half between 4.8 years and 11.8 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

31 wells

42-2270200214Yes
42-22702003123,100 ftFeb 1947Yes
42-2270203523Yes
42-22702152153,000 ftFeb 2005Yes
42-2270215317Yes
42-22704318203,020 ftJul 1993Yes
42-22734686793,200 ftJan 2025Yes
42-22733087633,100 ftMar 2019Jun 2023Yes
42-22702151133,135 ftJul 2016Yes
42-22733005613,110 ftJul 2016Yes
42-22734039703,200 ftJan 2015Yes
42-2273387367W3,200 ftJun 2014Yes
42-22730345413,100 ftAug 2010Yes
42-22703454162,983 ftMar 2001Yes
42-22730456503,100 ftNov 1993May 1995Yes
42-22734273763,050 ftNov 1993Yes
42-22734761803,200 ftSep 1993Apr 2024Yes
42-22702009192,990 ftMay 1993Yes
42-22702150113,068 ftDec 1991Nov 2016Yes
42-22730351453,735 ftFeb 1991May 1996Yes
42-22730322393,100 ftMay 1990May 1996Yes
42-22733912693,200 ftOct 1988Yes
42-22733314663,900 ftJun 1988Jun 1991Yes
42-22734132753,200 ftApr 1987May 1996Yes
42-2273388068W3,200 ftFeb 1986May 1996Yes
42-22730219383,100 ftJun 1985Apr 1996Yes
42-22733086643,250 ftOct 1983Yes
42-22733085653,250 ftOct 1983Yes
42-22733088623,100 ftOct 1983May 1996Yes
42-22733006603,100 ftMar 1983Yes
42-22730439473,850 ftJan 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 (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 20111,32979795.723.31$129,851
Oct 20111,59852584.983.65$137,714
Sep 20111,54450683.623.99$131,126
Aug 20111,43022183.404.15$120,179
Jul 20111,45033694.144.52$138,021
Jun 20111,42328592.904.64$133,519
May 201198620998.134.40$97,677
Apr 201150634105.964.33$53,763
Mar 20111751296.364.06$16,912
Feb 20111,05316985.644.18$90,885
Jan 20111,32528886.504.59$115,934
Dec 20101,28629085.734.35$111,510
Nov 20101,27322780.843.80$103,771
Oct 20101,40843378.103.51$111,484
Sep 201099566072.633.98$74,893
Aug 201095156473.684.42$72,562
Jul 20101,33347872.554.74$98,973
Jun 20101,17642170.364.91$84,811
May 20101,41845371.124.24$102,767
Apr 20101,26726781.694.12$104,602
Mar 20101,22834978.394.39$97,795
Feb 20101,09540073.585.44$82,747
Jan 20101,26039174.365.96$96,026
Dec 20091,42941671.445.48$104,369
Nov 20091,36345774.593.75$103,381
Oct 20091,50753472.544.11$111,513
Sep 20091,49952065.543.06$99,838
Aug 20091,47945867.423.22$101,188
Jul 20091,42013661.133.46$87,276
Jun 20091,45138966.163.90$97,513
May 20091,46632854.743.93$81,536
Apr 20091,28844946.773.59$61,851
Mar 20091,44449842.144.06$62,872
Feb 20091,27045732.814.63$43,786
Jan 20091,66951435.865.37$62,611
Dec 20081,45124137.105.98$55,273
Nov 20081,47030955.496.86$83,690
Oct 20081,71431675.246.92$131,149
Sep 20081,451103101.767.88$148,465
Aug 20081,403303114.228.48$162,821
Jul 20081,439212131.0811.39$191,039
Jun 20081,454106131.3313.03$192,335
May 20081,205248123.1711.57$151,290
Apr 20081,042123110.3110.45$116,229
Mar 20081,120158101.909.66$115,655
Feb 20081,31728992.538.77$124,397
Jan 20081,25531390.388.21$115,995
Dec 20071,25937788.337.30$113,960
Nov 20071,44544791.677.29$135,723
Oct 20071,47343782.856.92$125,063
Sep 20071,42644175.846.24$110,902
Aug 20071,55139769.066.39$109,648
Jul 20071,47413270.906.39$105,350
Jun 20071,48549162.007.55$95,776
May 20071,39349958.747.85$85,740
Apr 20071,42047459.617.81$88,346
Mar 20071,45946156.927.30$86,412
Feb 20071,27222755.108.22$71,952
Jan 20071,46631750.306.73$75,872
Dec 20061,59554356.656.92$94,113
Nov 20061,58960054.207.62$90,694
Oct 20061,62562154.906.01$92,947
Sep 20061,52956360.085.04$94,698
Aug 20061,53552568.717.34$109,323
Jul 20061,62560669.376.34$116,570
Jun 20061,40548566.286.38$96,220
May 20061,52151566.016.42$103,710
Apr 20061,57654064.397.36$105,453
Mar 20061,67155756.707.08$98,691
Feb 20061,58546857.597.75$94,908
Jan 20061,73246260.598.93$109,069
Dec 20051,80847354.9413.42$105,677
Nov 20051,92246754.6910.59$110,059
Oct 20051,85245858.3413.80$114,364
Sep 20051,74431261.4512.08$110,937
Aug 20051,83081461.519.80$120,538
Jul 20051,47243355.697.84$85,372
Jun 20051,58444252.337.38$86,153
May 20051,22639045.226.65$58,034
Apr 20051,69547649.207.36$86,898
Mar 20051,64647550.377.15$86,308
Feb 20051,34639845.226.31$63,378
Jan 20051,60228843.166.32$70,963
Dec 20041,36745539.866.75$57,560
Nov 20041,22343645.286.33$58,138
Oct 20041,33757249.706.52$70,176
Sep 20041,15752543.245.28$52,803
Aug 20041,72288142.375.55$77,851
Jul 20041,82889538.286.08$75,421
Jun 20041,44879736.106.43$57,400
May 20041,69986137.486.49$69,270
Apr 20041,42982434.475.86$54,085
Mar 20041,93384234.365.53$71,074
Feb 20041,86180232.455.51$64,808
Jan 20041,91076132.036.30$65,971
Dec 20032,06879730.266.30$67,600
Nov 20032,08461128.804.60$62,827
Oct 20032,14780828.174.76$64,327
Sep 20031,93276426.314.75$54,459
Aug 20032,05783829.765.13$65,515
Jul 20031,88584429.415.17$59,802
Jun 20031,74281628.565.98$54,634
May 20031,85661026.595.97$52,994
Apr 20032,18074126.675.41$62,147
Mar 20032,26378631.146.10$75,261
Feb 20032,16462633.487.93$77,412
Jan 20032,24166930.315.58$71,659
Dec 20022,22173426.914.85$63,330
Nov 20022,34985924.664.14$61,480
Oct 20022,46889426.464.23$69,084
Sep 20022,28677327.443.64$65,538
Aug 20022,21888025.963.16$60,364
Jul 20022,5451,02824.583.06$65,704
Jun 20022,61195423.733.34$65,144
May 20022,28070024.663.58$58,734
Apr 20022,45194623.653.51$61,289
Mar 20022,61297122.003.10$60,477
Feb 20022,19983918.222.38$42,059
Jan 20022,76597617.172.38$49,794
Dec 20012,54289616.932.36$45,155
Nov 20012,74191418.072.41$51,729
Oct 20012,54592819.782.53$52,687
Sep 20012,66798324.262.25$66,914
Aug 20013,0101,05424.873.05$78,077
Jul 20012,5901,06223.933.20$65,374
Jun 20012,5461,04424.563.82$66,522
May 20012,8061,06925.524.31$76,214
Apr 20012,8021,02424.685.34$74,617
Mar 20012,9991,01324.545.38$79,042
Feb 20012,63295027.755.77$78,517
Jan 20012,86489227.478.40$86,166
Dec 20002,72490026.889.12$81,431
Nov 20002,74293532.215.66$93,610
Oct 20002,8641,18531.235.15$95,540
Sep 20002,8321,19031.875.19$96,428
Aug 20003,0561,23729.644.54$96,197
Jul 20002,8221,10128.534.09$85,014
Jun 20002,4401,02729.304.40$76,008
May 20002,8121,21827.263.68$81,137
Apr 20003,0131,21124.513.12$77,622
Mar 20002,8191,13928.422.86$83,373
Feb 20002,6621,08327.622.73$76,477
Jan 20002,7661,11625.272.48$72,665
Dec 19992,5991,11524.282.42$65,806
Nov 19992,7971,16323.192.43$67,693
Oct 19992,9411,27720.982.80$65,283
Sep 19992,9191,24021.752.62$66,736
Aug 19993,3411,35419.262.88$68,241
Jul 19993,3781,23417.892.37$63,360
Jun 19993,1621,14715.942.36$53,112
May 19993,3381,12115.792.32$55,309
Apr 19993,24294015.102.21$51,030
Mar 19993,5551,03012.471.84$46,224
Feb 19993,0029769.981.82$31,734
Jan 19993,9581,08210.381.90$43,140
Dec 19983,5311,1479.201.77$34,519
Nov 19983,5561,13110.892.19$41,197
Oct 19983,6411,19412.421.97$47,572
Sep 19983,4901,17912.592.08$46,395
Aug 19983,5461,25611.301.91$42,465
Jul 19983,7101,19911.742.24$46,238
Jun 19983,6411,10311.242.24$43,393
May 19983,8811,21312.622.21$51,655
Apr 19984,0991,18913.042.51$56,430
Mar 19984,5031,23012.802.31$60,479
Feb 19984,19699913.952.30$60,831
Jan 19984,5611,14514.702.15$69,514
Dec 19974,5511,16616.322.41$77,084
Nov 19974,3181,23318.193.09$82,352
Oct 19974,5141,28919.253.15$90,955
Sep 19973,8621,36617.742.95$72,548
Aug 19974,67452917.862.55$84,829
Jul 19974,4081,38217.582.25$80,598
Jun 19974,2131,17717.242.26$75,289
May 19974,4551,07818.972.31$87,000
Apr 19974,5891,19917.882.08$84,549
Mar 19974,6931,21618.951.94$91,290
Feb 19973,6561,10520.492.21$77,349
Jan 19973,8231,17823.483.54$93,934
Dec 19964,5601,04723.32$106,339
Nov 19964,5681,61721.97$100,359
Oct 19964,6681,37923.31$108,811
Sep 19964,4161,35922.22$98,124
Aug 19964,4971,40620.26$91,109
Jul 19964,8841,44919.55$95,482
Jun 19964,6041,48118.73$86,233
May 19965,3641,74419.43$104,223
Apr 19965,5741,61021.51$119,897
Mar 19965,6051,54819.38$108,625
Feb 19965,5571,45616.98$94,358
Jan 19966,2281,59517.07$106,312
Dec 19956,7191,87817.19$115,500
Nov 19955,9631,68516.00$95,408
Oct 19956,3462,54315.43$97,919
Sep 19956,8031,96616.18$110,073
Aug 19956,0551,34815.92$96,396
Jul 19954,9641,24115.24$75,651
Jun 19954,08777416.41$67,068
May 19954,40482417.56$77,334
Apr 19954,71083517.73$83,508
Mar 19954,69070016.44$77,104
Feb 19954,10454816.58$68,044
Jan 19954,48568615.92$71,401
Dec 19944,69386815.03$70,536
Nov 19944,5841,03615.90$72,886
Oct 19944,6951,21015.58$73,148
Sep 19944,55784415.29$69,677
Aug 19945,3191,10416.13$85,795
Jul 19944,9941,15017.56$87,695
Jun 19944,6671,02517.09$79,759
May 19945,1431,13015.88$81,671
Apr 19945,4831,09114.14$77,530
Mar 19945,4491,18512.46$67,895
Feb 19944,83499712.50$60,425
Jan 19945,3321,21912.66$67,503
Dec 19935,2091,02212.33$64,227
Nov 19935,0981,19014.49$73,870
Oct 19935,4341,26015.85$86,129
Sep 19935,6471,50515.03$84,874
Aug 19935,7361,50915.66$89,826
Jul 19936,1231,30015.46$94,662
Jun 19935,5451,27616.79$93,101
May 19935,3491,12617.68$94,570
Apr 19935,4821,16718.05$98,950
Mar 19935,8001,11618.14$105,212
Feb 19935,3331,10317.90$95,461
Jan 19936,0311,11616.93$102,105

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                1,329 bbl  × $ 95.72 =   $127,212
Casinghead gas       797 Mcf  × $  3.31 =     $2,639

────────────────────────────────────────────────────
Month total                                 $129,851

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/19033 is the state's own key, not one this site invented.