CHALK, G. O. -C-

Operated by CONOCOPHILLIPS COMPANY (P-5 172232) in the HOWARD GLASSCOCK field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 2687District 08Field 42971001Hydrogen sulphide fieldNGPA filingOilCasinghead gasSaveExport
Value, all time
$1.5 M
Jan 1993 – Mar 2012
Value, last 12 filed months
$49 k
at the published price for each month
Months reported
231
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 285 leases and 3,948 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
400 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 2008-07-28.

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: HOWARD GLASSCOCK (CONSOLIDATED), EFFECTIVE 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
NGPA11none

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
OilDisposition55,287 bbl$1,487,383
Casinghead gasProduction6,480 Mcf$21,054
Total$1,508,437

2,850 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 (18)

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 32.1000, -101.2821. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.5 miles.

32.09977, -101.28150 · 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%
18 of 18 wells
With a plug date
77.8%
14 of 18 wells
Median depth
2,699 ft
18 wells filed one
Completion to plug
5.8 years
median over 11 wells

What the state filed about each well

On the RRC proration schedule
18100.0%
A plug date is filed
1477.8%
BothOn the schedule and plugged. Neither fact cancels the other.
1477.8%
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, 18 of 18 wells. Median 2,699 ft, with the middle half between 1,970 and 3,150 ft; the shallowest is 1,848 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, 15 of 18 wells, Oct 1964 – Jul 2010. This is the LAST completion filed on each wellbore, not the first — a well recompleted in 2019 counts once, in the 2010s.

Completions filed
Oct 1964 – Jul 2010
15 of 18 wells; 3 filed none
Plug dates filed
Jun 1993 – Feb 2005
14 of 18 wells; 4 filed none

Last completion to plug: a median of 5.8 years across the 11 wells that filed both dates, with the middle half between 5.3 years and 17.0 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

18 wells

42-2270050571,927 ftJun 1993Yes
42-2270051161,848 ftAug 1994Yes
42-22710065141,960 ftAug 1994Yes
42-22732184233,230 ftJul 2010Yes
42-22730842222,000 ftSep 1993Feb 2005Yes
42-22730002182,800 ftJan 1992Aug 1994Yes
42-2273029719WS3,900 ftAug 1990May 1996Yes
42-2270242141,880 ftApr 1989Aug 1994Yes
42-22710062112,000 ftApr 1989Aug 1994Yes
42-22710067152,660 ftApr 1989Aug 1994Yes
42-22710064132,697 ftDec 1988Sep 1994Yes
42-2271006312 L1,900 ftAug 1988Aug 1994Yes
42-2270050783,190 ftOct 1973Yes
42-227100609 U3,150 ftOct 1973Yes
42-2271006110 U3,149 ftOct 1973May 1996Yes
42-22730003172,800 ftJan 1969Yes
42-22710066162,700 ftMay 1965Sep 1994Yes
42-2270251623,176 ftOct 1964Jun 1993Yes

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 (231)

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

231 months

Mar 201200105.052.22$0
Feb 201200101.102.57$0
Jan 20120098.092.73$0
Dec 20110096.873.24$0
Nov 201162395.723.31$5,945
Oct 201170184.983.65$5,952
Sep 201189383.623.99$7,454
Aug 2011971283.404.15$8,140
Jul 201149394.144.52$4,626
Jun 201147092.904.64$4,366
May 201169098.134.40$6,771
Apr 2011560105.964.33$5,934
Mar 20117096.364.06$675
Feb 201171885.644.18$6,114
Jan 201182986.504.59$7,134
Dec 2010891685.734.35$7,700
Nov 2010832180.843.80$6,789
Oct 2010701878.103.51$5,530
Sep 2010943872.633.98$6,978
Aug 2010924373.684.42$6,969
Jul 2010893572.554.74$6,623
Jun 2010812070.364.91$5,797
May 2010934071.124.24$6,784
Apr 2010873281.694.12$7,239
Mar 2010925378.394.39$7,444
Feb 2010914573.585.44$6,941
Jan 2010684174.365.96$5,301
Dec 2009231871.445.48$1,742
Nov 2009341674.593.75$2,596
Oct 2009924872.544.11$6,871
Sep 2009874365.543.06$5,834
Aug 2009914367.423.22$6,274
Jul 20091192761.133.46$7,368
Jun 20091062666.163.90$7,114
May 20091222354.743.93$6,769
Apr 20091202646.773.59$5,706
Mar 20091233142.144.06$5,309
Feb 20091212132.814.63$4,067
Jan 20091272435.865.37$4,683
Dec 20081002037.105.98$3,830
Nov 20081253055.496.86$7,142
Oct 20081342875.246.92$10,276
Sep 20089021101.767.88$9,324
Aug 200813540114.228.48$15,759
Jul 20089526131.0811.39$12,749
Jun 200871131.3313.03$932
May 200812138123.1711.57$15,343
Apr 200811831110.3110.45$13,341
Mar 200812940101.909.66$13,532
Feb 20081164292.538.77$11,102
Jan 20081114190.388.21$10,369
Dec 20071054988.337.30$9,632
Nov 2007863491.677.29$8,132
Oct 2007853582.856.92$7,285
Sep 20071074375.846.24$8,383
Aug 20071095169.066.39$7,853
Jul 20071004570.906.39$7,377
Jun 20071056162.007.55$6,970
May 20071054958.747.85$6,552
Apr 20071024459.617.81$6,424
Mar 20071113256.927.30$6,552
Feb 2007983655.108.22$5,696
Jan 20071023650.306.73$5,373
Dec 20061144856.656.92$6,790
Nov 2006984854.207.62$5,677
Oct 2006952854.906.01$5,384
Sep 20061082660.085.04$6,620
Aug 20061171668.717.34$8,157
Jul 2006901469.376.34$6,332
Jun 20061161066.286.38$7,752
May 20061141266.016.42$7,602
Apr 20061252264.397.36$8,211
Mar 20061302056.707.08$7,513
Feb 20061292757.597.75$7,638
Jan 20061291160.598.93$7,914
Dec 20051141254.9413.42$6,424
Nov 20051151854.6910.59$6,480
Oct 20051341458.3413.80$8,011
Sep 20051331461.4512.08$8,342
Aug 2005122061.519.80$7,504
Jul 20051392355.697.84$7,921
Jun 20051422452.337.38$7,608
May 20051353345.226.65$6,324
Apr 2005502749.207.36$2,659
Mar 20051692350.377.15$8,677
Feb 20051412345.226.31$6,521
Jan 20053161543.166.32$13,733
Dec 20041392739.866.75$5,723
Nov 20042592445.286.33$11,879
Oct 20042682049.706.52$13,450
Sep 20042572043.245.28$11,218
Aug 20041472342.375.55$6,356
Jul 20041241138.286.08$4,814
Jun 2004541936.106.43$2,072
May 20041102437.486.49$4,279
Apr 20041451734.475.86$5,098
Mar 20041352134.365.53$4,755
Feb 20041412332.455.51$4,702
Jan 20041582732.036.30$5,231
Dec 20031512130.266.30$4,702
Nov 20031562428.804.60$4,603
Oct 20031592328.174.76$4,589
Sep 20031552726.314.75$4,206
Aug 2003842329.765.13$2,618
Jul 2003902429.415.17$2,771
Jun 20032592528.565.98$7,547
May 20032863126.595.97$7,790
Apr 20032683026.675.41$7,310
Mar 20031182731.146.10$3,839
Feb 20032172733.487.93$7,479
Jan 20031853130.315.58$5,780
Dec 20021773126.914.85$4,914
Nov 20021973524.664.14$5,003
Oct 20024373726.464.23$11,720
Sep 20023923427.443.64$10,880
Aug 2002924225.963.16$2,521
Jul 2002934424.583.06$2,421
Jun 2002864723.733.34$2,198
May 2002844724.663.58$2,240
Apr 2002823223.653.51$2,052
Mar 2002872522.003.10$1,992
Feb 2002792218.222.38$1,492
Jan 2002822417.172.38$1,465
Dec 2001912416.932.36$1,597
Nov 20012192418.072.41$4,015
Oct 20012142719.782.53$4,301
Sep 20011742524.262.25$4,278
Aug 20012213124.873.05$5,591
Jul 2001793223.933.20$1,993
Jun 2001783324.563.82$2,042
May 20011572825.524.31$4,127
Apr 20011561724.685.34$3,941
Mar 20011882724.545.38$4,759
Feb 20011792727.755.77$5,123
Jan 20012153827.478.40$6,225
Dec 20002323826.889.12$6,583
Nov 20002253332.215.66$7,434
Oct 20002332731.235.15$7,416
Sep 2000223131.875.19$7,112
Aug 2000270129.644.54$8,007
Jul 2000232028.534.09$6,619
Jun 2000195029.304.40$5,714
May 2000206127.263.68$5,619
Apr 2000175124.513.12$4,292
Mar 2000264128.422.86$7,506
Feb 2000250127.622.73$6,908
Jan 2000212125.272.48$5,360
Dec 1999263124.282.42$6,388
Nov 1999250123.192.43$5,800
Oct 1999250120.982.80$5,248
Sep 1999233121.752.62$5,070
Aug 1999226119.262.88$4,356
Jul 1999375117.892.37$6,711
Jun 1999264115.942.36$4,211
May 1999310115.792.32$4,897
Apr 1999289115.102.21$4,366
Mar 1999347112.471.84$4,329
Feb 199941219.981.82$4,114
Jan 1999297110.381.90$3,085
Dec 199816019.201.77$1,474
Nov 1998160110.892.19$1,745
Oct 1998269112.421.97$3,343
Sep 1998208112.592.08$2,621
Aug 1998340111.301.91$3,844
Jul 1998189111.742.24$2,221
Jun 1998161111.242.24$1,812
May 1998294112.622.21$3,712
Apr 1998244113.042.51$3,184
Mar 1998151112.802.31$1,935
Feb 1998159113.952.30$2,220
Jan 1998196114.702.15$2,883
Dec 1997321116.322.41$5,241
Nov 1997310118.193.09$5,642
Oct 1997347119.253.15$6,683
Sep 1997320117.742.95$5,680
Aug 1997343117.862.55$6,129
Jul 1997304117.582.25$5,347
Jun 1997208117.242.26$3,588
May 1997164118.972.31$3,113
Apr 1997110117.882.08$1,969
Mar 1997359118.951.94$6,805
Feb 1997231120.492.21$4,735
Jan 1997303023.483.54$7,114
Dec 1996312123.32$7,276
Nov 1996375121.97$8,239
Oct 1996405123.31$9,441
Sep 1996336122.22$7,466
Aug 1996312120.26$6,321
Jul 1996222119.55$4,340
Jun 1996142118.73$2,660
May 1996310119.43$6,023
Apr 1996280121.51$6,023
Mar 1996282119.38$5,465
Feb 1996296116.98$5,026
Jan 199637418017.07$6,384
Dec 199598729317.19$16,967
Nov 1995995116.00$15,920
Oct 19951,081115.43$16,680
Sep 199590327516.18$14,611
Aug 199532729315.92$5,206
Jul 1995330115.24$5,029
Jun 199531724916.41$5,202
May 199529322917.56$5,145
Apr 199534926217.73$6,188
Mar 199560326216.44$9,913
Feb 199529924916.58$4,957
Jan 199536727815.92$5,843
Dec 199453224315.03$7,996
Nov 1994580115.90$9,222
Oct 1994595115.58$9,270
Sep 1994517115.29$7,905
Aug 1994359116.13$5,791
Jul 1994450117.56$7,902
Jun 1994487117.09$8,323
May 1994536115.88$8,512
Apr 1994569114.14$8,046
Mar 1994589112.46$7,339
Feb 1994422112.50$5,275
Jan 1994492112.66$6,229
Dec 1993476112.33$5,869
Nov 1993700114.49$10,143
Oct 1993536115.85$8,496
Sep 19931,030115.03$15,481
Aug 1993824115.66$12,904
Jul 1993962115.46$14,873
Jun 1993963116.79$16,169
May 1993993117.68$17,556
Apr 19931,021118.05$18,429
Mar 1993974118.14$17,668
Feb 1993630117.90$11,277
Jan 19931,081116.93$18,301

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                   62 bbl  × $ 95.72 =     $5,935
Casinghead gas         3 Mcf  × $  3.31 =        $10

────────────────────────────────────────────────────
Month total                                   $5,945

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/2687 is the state's own key, not one this site invented.