CHALK, OTIS

Operated by SAHARA OPERATING COMPANY (P-5 743279) 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 2799District 08Field 42971001Hydrogen sulphide fieldOilCasinghead gasSaveExport
Value, all time
$6.0 M
Jan 1993 – Jul 2012
Value, last 12 filed months
$293 k
at the published price for each month
Months reported
235
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.

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
OilDisposition160,512 bbl$5,991,009
Casinghead gasProduction21 Mcf$0
Total$5,991,009

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 (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 32.1420, -101.2447. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.5 miles.

32.14196, -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%
18 of 18 wells
With a plug date
38.9%
7 of 18 wells
Median depth
3,000 ft
17 wells filed one
Completion to plug
41.5 years
median over 4 wells

What the state filed about each well

On the RRC proration schedule
18100.0%
A plug date is filed
738.9%
BothOn the schedule and plugged. Neither fact cancels the other.
738.9%
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, 17 of 18 wells. Median 3,000 ft, with the middle half between 2,402 and 3,008 ft; the shallowest is 1,350 ft and the deepest 3,200 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, 12 of 18 wells, Jan 1939 – Sep 1996. 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 1939 – Sep 1996
12 of 18 wells; 6 filed none
Plug dates filed
Dec 1993 – Jan 2024
7 of 18 wells; 11 filed none

Last completion to plug: a median of 41.5 years across the 4 wells that filed both dates, with the middle half between 32.4 years and 57.7 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

18 wells

42-2270099293,060 ftYes
42-227021574Yes
42-2270225373,200 ftJan 2024Yes
42-2270225482,938 ftOct 2019Yes
42-2270239862,944 ftDec 1993Yes
42-22710842143,000 ftYes
42-227304792W3,010 ftSep 1996Aug 2023Yes
42-22780441172,402 ftJul 1974Mar 2023Yes
42-2273048155W3,008 ftOct 1973Jan 2008Yes
42-2273048256W3,006 ftOct 1973Yes
42-227304843W3,008 ftOct 1973Yes
42-22710867151,730 ftJan 1968Yes
42-22710866131,731 ftJan 1968Yes
42-22710816112,340 ftDec 1967Yes
42-22710841123,000 ftNov 1967Yes
42-22710817103,025 ftOct 1967Yes
42-2270239221,350 ftSep 1961Yes
42-2270225252,891 ftJan 1939Aug 2023Yes

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 (235)

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

235 months

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 2011384096.873.24$37,198
Nov 2011609095.723.31$58,293
Oct 2011581084.983.65$49,373
Sep 2011653083.623.99$54,604
Aug 20111,120083.404.15$93,408
Jul 2011211094.144.52$19,864
Jun 2011836092.904.64$77,664
May 2011445098.134.40$43,668
Apr 20115590105.964.33$59,232
Mar 2011719096.364.06$69,283
Feb 2011411085.644.18$35,198
Jan 2011536086.504.59$46,364
Dec 2010605085.734.35$51,867
Nov 2010434080.843.80$35,085
Oct 2010621078.103.51$48,500
Sep 2010584072.633.98$42,416
Aug 2010642073.684.42$47,303
Jul 2010646072.554.74$46,867
Jun 2010705070.364.91$49,604
May 2010643071.124.24$45,730
Apr 2010521081.694.12$42,560
Mar 2010575078.394.39$45,074
Feb 2010519073.585.44$38,188
Jan 2010543074.365.96$40,377
Dec 2009652071.445.48$46,579
Nov 2009447074.593.75$33,342
Oct 2009709072.544.11$51,431
Sep 2009744065.543.06$48,762
Aug 2009587067.423.22$39,576
Jul 2009604061.133.46$36,923
Jun 2009651066.163.90$43,070
May 2009634054.743.93$34,705
Apr 2009622046.773.59$29,091
Mar 2009711042.144.06$29,962
Feb 2009704032.814.63$23,098
Jan 2009760035.865.37$27,254
Dec 2008706037.105.98$26,193
Nov 2008710055.496.86$39,398
Oct 2008683075.246.92$51,389
Sep 20087870101.767.88$80,085
Aug 20086330114.228.48$72,301
Jul 20086590131.0811.39$86,382
Jun 20085910131.3313.03$77,616
May 20087020123.1711.57$86,465
Apr 20086940110.3110.45$76,555
Mar 20085420101.909.66$55,230
Feb 2008611092.538.77$56,536
Jan 2008714090.388.21$64,531
Dec 2007716088.337.30$63,244
Nov 2007611091.677.29$56,010
Oct 2007784082.856.92$64,954
Sep 2007638075.846.24$48,386
Aug 2007736069.066.39$50,828
Jul 2007782070.906.39$55,444
Jun 2007528062.007.55$32,736
May 2007626058.747.85$36,771
Apr 2007550059.617.81$32,786
Mar 2007530056.927.30$30,168
Feb 2007423055.108.22$23,307
Jan 2007570050.306.73$28,671
Dec 2006572056.656.92$32,404
Nov 2006647054.207.62$35,067
Oct 2006609054.906.01$33,434
Sep 2006588060.085.04$35,327
Aug 2006524068.717.34$36,004
Jul 2006603069.376.34$41,830
Jun 2006607066.286.38$40,232
May 2006733066.016.42$48,385
Apr 2006554064.397.36$35,672
Mar 2006730056.707.08$41,391
Feb 2006564057.597.75$32,481
Jan 2006639060.598.93$38,717
Dec 2005517054.9413.42$28,404
Nov 2005654054.6910.59$35,767
Oct 2005570058.3413.80$33,254
Sep 2005591061.4512.08$36,317
Aug 2005587061.519.80$36,106
Jul 2005550055.697.84$30,630
Jun 2005666052.337.38$34,852
May 2005415045.226.65$18,766
Apr 2005511049.207.36$25,141
Mar 2005759050.377.15$38,231
Feb 2005449045.226.31$20,304
Jan 2005615043.166.32$26,543
Dec 2004539039.866.75$21,485
Nov 2004513045.286.33$23,229
Oct 2004585049.706.52$29,075
Sep 2004551043.245.28$23,825
Aug 2004591042.375.55$25,041
Jul 2004500038.286.08$19,140
Jun 2004547036.106.43$19,747
May 2004633037.486.49$23,725
Apr 20040034.475.86$0
Mar 2004724034.365.53$24,877
Feb 2004435032.455.51$14,116
Jan 2004578032.036.30$18,513
Dec 2003714030.266.30$21,606
Nov 2003560028.804.60$16,128
Oct 2003618028.174.76$17,409
Sep 2003639026.314.75$16,812
Aug 2003589029.765.13$17,529
Jul 2003638029.415.17$18,764
Jun 2003589028.565.98$16,822
May 2003663026.595.97$17,629
Apr 2003632026.675.41$16,855
Mar 2003732031.146.10$22,794
Feb 2003554033.487.93$18,548
Jan 2003637030.315.58$19,307
Dec 2002587026.914.85$15,796
Nov 2002642024.664.14$15,832
Oct 2002624026.464.23$16,511
Sep 2002703027.443.64$19,290
Aug 2002699025.963.16$18,146
Jul 2002709024.583.06$17,427
Jun 2002635023.733.34$15,069
May 2002694024.663.58$17,114
Apr 2002600023.653.51$14,190
Mar 2002627022.003.10$13,794
Feb 2002584018.222.38$10,640
Jan 2002765017.172.38$13,135
Dec 2001405016.932.36$6,857
Nov 2001631018.072.41$11,402
Oct 2001691019.782.53$13,668
Sep 2001783024.262.25$18,996
Aug 2001653024.873.05$16,240
Jul 2001771023.933.20$18,450
Jun 2001597024.563.82$14,662
May 2001734025.524.31$18,732
Apr 2001745024.685.34$18,387
Mar 2001500024.545.38$12,270
Feb 2001597027.755.77$16,567
Jan 2001855027.478.40$23,487
Dec 2000562026.889.12$15,107
Nov 2000647032.215.66$20,840
Oct 2000698031.235.15$21,799
Sep 2000564031.875.19$17,975
Aug 2000707029.644.54$20,955
Jul 2000592028.534.09$16,890
Jun 2000641029.304.40$18,781
May 2000731027.263.68$19,927
Apr 2000710024.513.12$17,402
Mar 2000794028.422.86$22,565
Feb 2000780027.622.73$21,544
Jan 2000811025.272.48$20,494
Dec 1999655024.282.42$15,903
Nov 19991,201023.192.43$27,851
Oct 1999380020.982.80$7,972
Sep 1999727021.752.62$15,812
Aug 1999788019.262.88$15,177
Jul 1999770017.892.37$13,775
Jun 1999802015.942.36$12,784
May 1999733015.792.32$11,574
Apr 1999759015.102.21$11,461
Mar 1999783012.471.84$9,764
Feb 199963909.981.82$6,377
Jan 1999600010.381.90$6,228
Dec 199856209.201.77$5,170
Nov 1998594010.892.19$6,469
Oct 1998727012.421.97$9,029
Sep 1998766012.592.08$9,644
Aug 1998608011.301.91$6,870
Jul 19981,010011.742.24$11,857
Jun 1998438011.242.24$4,923
May 1998743012.622.21$9,377
Apr 1998855013.042.51$11,149
Mar 1998844012.802.31$10,803
Feb 1998689013.952.30$9,612
Jan 1998775014.702.15$11,393
Dec 19971,156016.322.41$18,866
Nov 1997400018.193.09$7,276
Oct 19971,247019.253.15$24,005
Sep 1997440017.742.95$7,806
Aug 1997723017.862.55$12,913
Jul 19971,126017.582.25$19,795
Jun 1997742017.242.26$12,792
May 1997847018.972.31$16,068
Apr 19971,194017.882.08$21,349
Mar 1997887018.951.94$16,809
Feb 1997849020.492.21$17,396
Jan 1997781023.483.54$18,338
Dec 1996760023.32$17,723
Nov 1996582021.97$12,787
Oct 1996818023.31$19,068
Sep 1996888022.22$19,731
Aug 1996891020.26$18,052
Jul 1996776019.55$15,171
Jun 1996870018.73$16,295
May 19961,109019.43$21,548
Apr 1996809021.51$17,402
Mar 19961,081019.38$20,950
Feb 1996856016.98$14,535
Jan 1996793017.07$13,537
Dec 19951,018017.19$17,499
Nov 1995870016.00$13,920
Oct 1995877015.43$13,532
Sep 1995445016.18$7,200
Aug 1995834015.92$13,277
Jul 1995886015.24$13,503
Jun 1995444016.41$7,286
May 1995795017.56$13,960
Apr 1995872017.73$15,461
Mar 1995855016.44$14,056
Feb 1995871016.58$14,441
Jan 1995848015.92$13,500
Dec 1994847015.03$12,730
Nov 1994407015.90$6,471
Oct 19941,195015.58$18,618
Sep 1994800115.29$12,232
Aug 1994767116.13$12,372
Jul 1994802117.56$14,083
Jun 19941,210117.09$20,679
May 1994902115.88$14,324
Apr 1994807114.14$11,411
Mar 19941,238112.46$15,425
Feb 1994831112.50$10,388
Jan 1994814112.66$10,305
Dec 1993791112.33$9,753
Nov 19931,152114.49$16,692
Oct 19931,211115.85$19,194
Sep 1993828115.03$12,445
Aug 1993821115.66$12,857
Jul 19931,190115.46$18,397
Jun 19931,200116.79$20,148
May 1993817117.68$14,445
Apr 19931,225118.05$22,111
Mar 1993845118.14$15,328
Feb 19931,333117.90$23,861
Jan 19931,255116.93$21,247

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                  384 bbl  × $ 96.87 =    $37,198
Casinghead gas         0 Mcf  × $  3.24 =         $0

────────────────────────────────────────────────────
Month total                                  $37,198

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/2799 is the state's own key, not one this site invented.