COTTON "A"

Operated by SHIDLER, MARK L., INC. (P-5 776590) in the WELLMAN (FUSSELMAN) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 18666District 8AField 96180500Hydrogen sulphide fieldOilCasinghead gasSaveExport
Value, all time
$13.7 M
Jan 1993 – May 2026
Value, last 12 filed months
$653 k
at the published price for each month
Months reported
401
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 2 leases and 2 wells, and the rule below applies to all of them.

Discovered
1964-06-07
as the register files it
Field class
Oil
the register's own label
Between wells
1,320 ft
minimum
From a lease line
660 ft
minimum

A drilling unit in this field needs at least 80 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.

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
OilDisposition276,124 bbl$13,671,684
Casinghead gasProduction1,122 Mcf$438
Total$13,672,122

989 Mcf of this lease's gas, across 40 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 (1)

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 33.0054, -102.4422. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.0 miles.

33.00541, -102.44221 · 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
0.0%
0 of 1 wells
With a plug date
0.0%
0 of 1 wells
Median depth
12,612 ft
1 wells filed one
Completion to plug
no well filed both dates

What the state filed about each well

On the RRC proration schedule
00.0%
A plug date is filed
00.0%
BothOn the schedule and plugged. Neither fact cancels the other.
00.0%
NeitherNo plug date, and not on the schedule.
1100.0%

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

The one well that filed a depth was drilled to 12,612 ft.

Completions filed
Nov 1981
1 of 1 wells

1 well

42-44500447112,612 ftNov 1981

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 (401)

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

401 months

May 20267171106.413.05$76,299
Apr 2026537198.932.87$53,128
Mar 2026877189.753.15$78,714
Feb 2026701163.503.75$44,517
Jan 2026879159.138.00$51,983
Dec 2025707156.664.41$40,063
Nov 2025879158.593.93$51,505
Oct 2025702159.383.30$41,688
Sep 20251,042162.743.08$65,378
Aug 2025697163.933.01$44,562
Jul 2025692166.743.32$46,187
Jun 2025883166.483.13$58,705
May 20251,068160.553.23$64,671
Apr 20251,154162.363.54$71,967
Mar 2025557167.704.27$37,713
Feb 2025354170.884.34$25,096
Jan 2025899174.324.28$66,818
Dec 2024535168.993.12$36,913
Nov 2024180169.052.20$12,431
Oct 20240171.372.28$2
Sep 2024161169.612.36$11,210
Aug 2024735175.632.06$55,590
Jul 2024178179.932.15$14,230
Jun 2024739178.082.63$57,704
May 2024557178.812.20$43,899
Apr 2024350184.451.66$29,559
Mar 2024565180.301.55$45,371
Feb 2024558176.091.78$42,460
Jan 2024360173.023.30$26,291
Dec 2023703171.262.61$50,098
Nov 2023555177.892.81$43,232
Oct 2023551185.443.09$47,081
Sep 2023556189.042.74$49,509
Aug 2023524180.522.67$42,195
Jul 2023553174.852.64$41,395
Jun 2023340168.962.26$23,449
May 2023555170.622.23$39,196
Apr 2023546178.122.24$42,656
Mar 2023342172.852.39$24,917
Feb 2023546175.112.47$41,013
Jan 2023554176.533.39$42,401
Dec 2022558176.415.73$42,643
Nov 2022527185.005.65$44,801
Oct 2022371187.185.86$32,350
Sep 2022739184.888.16$62,734
Aug 2022371194.529.13$35,076
Jul 20227551101.587.54$76,700
Jun 20225521115.097.98$63,538
May 20225651109.378.43$61,802
Apr 20225601104.226.84$58,370
Mar 20221541108.885.08$16,773
Feb 2022540191.054.86$49,172
Jan 2022543181.844.54$44,444
Dec 2021725171.323.90$51,711
Nov 2021552177.435.24$42,747
Oct 2021556179.795.71$44,369
Sep 2021553169.865.35$38,638
Aug 2021544166.024.22$35,919
Jul 2021505170.783.98$35,748
Jun 2021740169.493.38$51,426
May 2021364163.483.02$23,110
Apr 2021523160.362.76$31,571
Mar 2021738161.302.72$45,242
Feb 2021367157.805.55$21,218
Jan 2021557150.412.81$28,081
Dec 2020550144.642.68$24,555
Nov 2020550138.772.71$21,326
Oct 2020546136.972.48$20,188
Sep 2020550137.091.99$20,401
Aug 2020545139.982.39$21,791
Jul 2020555138.371.83$21,297
Jun 2020544134.901.69$18,987
May 20200116.921.81$2
Apr 2020552114.751.80$8,144
Mar 2020552130.341.86$16,750
Feb 2020556149.881.98$27,735
Jan 2020564157.252.09$32,291
Dec 2019540159.012.30$31,868
Nov 2019175155.302.75$9,680
Oct 2019734153.472.42$39,249
Sep 2019368155.052.66$20,261
Aug 2019550153.112.30$29,213
Jul 2019552156.272.46$31,064
Jun 2019735152.782.49$38,796
May 2019541158.482.74$31,640
Apr 2019183162.632.75$11,464
Mar 2019535156.803.06$30,391
Feb 2019186150.852.79$9,461
Jan 2019552146.033.23$25,412
Dec 2018363146.594.19$16,916
Nov 2018557152.934.24$29,486
Oct 20180161.443.40$3
Sep 2018718159.543.11$42,753
Aug 2018536159.403.07$31,841
Jul 2018355165.142.93$23,128
Jun 2018517160.183.08$31,116
May 2018533165.382.90$34,850
Apr 2018533163.842.90$34,030
Mar 2018513161.222.79$31,409
Feb 2018343161.782.77$21,193
Jan 2018518162.874.01$32,571
Dec 2017522157.272.92$29,898
Nov 2017525155.423.12$29,099
Oct 2017691149.292.98$34,062
Sep 2017532147.523.09$25,284
Aug 2017525145.373.00$23,822
Jul 2017531143.873.09$23,298
Jun 2017904142.493.09$38,414
May 2017528145.373.26$23,959
Apr 2017540147.933.21$25,885
Mar 2017706146.772.98$33,023
Feb 2017710150.452.95$35,822
Jan 2017535149.413.42$26,438
Dec 2016702148.763.72$34,233
Nov 2016702142.492.64$29,831
Oct 2016670146.193.09$30,950
Sep 2016703141.553.10$29,213
Aug 2016528141.442.92$21,883
Jul 2016670141.622.92$27,888
Jun 2016701145.352.69$31,793
May 2016689142.521.99$29,298
Apr 2016847136.561.99$30,968
Mar 2016522133.011.79$17,233
Feb 2016669126.472.06$17,710
Jan 2016678127.352.36$18,546
Dec 2015684132.362.00$22,136
Nov 2015677138.792.17$26,263
Oct 2015673143.552.43$29,312
Sep 2015677142.992.76$29,107
Aug 2015677140.162.87$27,191
Jul 20151,019148.152.95$49,068
Jun 2015336156.152.88$18,869
May 2015828155.212.96$45,717
Apr 2015681049.822.71$33,927
Mar 2015849042.892.93$36,414
Feb 2015511044.662.98$22,821
Jan 2015684043.433.10$29,706
Dec 2014681054.693.59$37,244
Nov 2014675070.464.25$47,561
Oct 2014685078.303.90$53,636
Sep 2014511086.164.05$44,028
Aug 2014858089.394.04$76,697
Jul 2014527096.564.18$50,887
Jun 2014514098.164.74$50,454
May 2014510094.734.73$48,312
Apr 2014840095.944.81$80,590
Mar 2014512095.895.06$49,096
Feb 2014712097.406.19$69,349
Jan 2014708090.404.86$64,003
Dec 2013699091.824.35$64,182
Nov 2013674088.853.74$59,885
Oct 2013523097.423.78$50,951
Sep 20136960104.113.72$72,461
Aug 20139000104.253.52$93,825
Jul 20137170102.523.72$73,507
Jun 2013901094.403.93$85,054
May 2013511094.834.15$48,458
Apr 2013696093.964.28$65,396
Mar 2013719093.623.91$67,313
Feb 2013706091.233.42$64,408
Jan 2013696091.603.42$63,754
Dec 2012887086.773.42$76,965
Nov 2012528086.953.62$45,910
Oct 2012717089.383.40$64,085
Sep 2012704094.672.92$66,648
Aug 2012715092.662.91$66,252
Jul 2012901085.133.02$76,702
Jun 2012536079.822.52$42,784
May 2012901091.612.49$82,541
Apr 20127130101.652.00$72,476
Mar 20127150105.052.22$75,111
Feb 20127050101.102.57$71,276
Jan 2012693098.092.73$67,976
Dec 2011883096.873.24$85,536
Nov 2011707095.723.31$67,674
Oct 2011720084.983.65$61,186
Sep 2011891083.623.99$74,505
Aug 2011534083.404.15$44,536
Jul 2011711094.144.52$66,934
Jun 2011882092.904.64$81,938
May 2011705098.134.40$69,182
Apr 20117170105.964.33$75,973
Mar 20111,074096.364.06$103,491
Feb 2011534085.644.18$45,732
Jan 2011720086.504.59$62,280
Dec 2010896085.734.35$76,814
Nov 2010709080.843.80$57,316
Oct 2010707078.103.51$55,217
Sep 2010699072.633.98$50,768
Aug 2010894073.684.42$65,870
Jul 2010536072.554.74$38,887
Jun 2010893070.364.91$62,831
May 2010538071.124.24$38,263
Apr 2010717081.694.12$58,572
Mar 2010716078.394.39$56,127
Feb 2010524073.585.44$38,556
Jan 2010534074.365.96$39,708
Dec 2009893071.445.48$63,796
Nov 2009531074.593.75$39,607
Oct 2009714072.544.11$51,794
Sep 2009891065.543.06$58,396
Aug 2009356067.423.22$24,002
Jul 2009690061.133.46$42,180
Jun 2009702066.163.90$46,444
May 2009711054.743.93$38,920
Apr 2009719046.773.59$33,628
Mar 2009541042.144.06$22,798
Feb 2009687032.814.63$22,540
Jan 2009532035.865.37$19,078
Dec 2008708037.105.98$26,267
Nov 2008721055.496.86$40,008
Oct 2008721075.246.92$54,248
Sep 20087100101.767.88$72,250
Aug 20088850114.228.48$101,085
Jul 20085290131.0811.39$69,341
Jun 20086910131.3313.03$90,749
May 20086780123.1711.57$83,509
Apr 20086930110.3110.45$76,445
Mar 20081,0450101.909.66$106,486
Feb 2008521092.538.77$48,208
Jan 2008520090.388.21$46,998
Dec 2007698088.337.30$61,654
Nov 2007707091.677.29$64,811
Oct 2007346082.856.92$28,666
Sep 2007349075.846.24$26,468
Aug 2007519069.066.39$35,842
Jul 2007347070.906.39$24,602
Jun 2007693062.007.55$42,966
May 2007688058.747.85$40,413
Apr 20071,032059.617.81$61,518
Mar 2007177056.927.30$10,075
Feb 2007506055.108.22$27,881
Jan 2007526050.306.73$26,458
Dec 2006869056.656.92$49,229
Nov 2006522054.207.62$28,292
Oct 2006661054.906.01$36,289
Sep 2006699060.085.04$41,996
Aug 2006521068.717.34$35,798
Jul 2006699069.376.34$48,490
Jun 2006322066.286.38$21,342
May 2006696066.016.42$45,943
Apr 2006862064.397.36$55,504
Mar 2006703056.707.08$39,860
Feb 2006517057.597.75$29,774
Jan 2006878060.598.93$53,198
Dec 2005531054.9413.42$29,173
Nov 2005877054.6910.59$47,963
Oct 2005670058.3413.80$39,088
Sep 2005876061.4512.08$53,830
Aug 2005691061.519.80$42,503
Jul 2005865055.697.84$48,172
Jun 2005664052.337.38$34,747
May 2005825045.226.65$37,307
Apr 2005668049.207.36$32,866
Mar 20051,009050.377.15$50,823
Feb 2005502045.226.31$22,700
Jan 2005703043.166.32$30,341
Dec 2004698039.866.75$27,822
Nov 2004895045.286.33$40,526
Oct 2004879049.706.52$43,686
Sep 2004531043.245.28$22,960
Aug 2004901042.375.55$38,175
Jul 2004714038.286.08$27,332
Jun 2004882036.106.43$31,840
May 2004703037.486.49$26,348
Apr 2004879034.475.86$30,299
Mar 2004875034.365.53$30,065
Feb 2004535032.455.51$17,361
Jan 2004890032.036.30$28,507
Dec 2003712030.266.30$21,545
Nov 2003710028.804.60$20,448
Oct 2003704028.174.76$19,832
Sep 2003882026.314.75$23,205
Aug 2003716029.765.13$21,308
Jul 2003894029.415.17$26,293
Jun 2003716028.565.98$20,449
May 2003701026.595.97$18,640
Apr 2003893026.675.41$23,816
Mar 2003715031.146.10$22,265
Feb 2003717033.487.93$24,005
Jan 2003905030.315.58$27,431
Dec 2002714026.914.85$19,214
Nov 2002719024.664.14$17,731
Oct 2002875026.464.23$23,153
Sep 2002714027.443.64$19,592
Aug 2002916025.963.16$23,779
Jul 2002724024.583.06$17,796
Jun 2002719023.733.34$17,062
May 2002904024.663.58$22,293
Apr 2002884023.653.51$20,907
Mar 2002705022.003.10$15,510
Feb 2002877018.222.38$15,979
Jan 2002710017.172.38$12,191
Dec 2001708016.932.36$11,986
Nov 2001902018.072.41$16,299
Oct 2001722019.782.53$14,281
Sep 2001720024.262.25$17,467
Aug 2001894024.873.05$22,234
Jul 2001722023.933.20$17,277
Jun 2001732024.563.82$17,978
May 20011,068025.524.31$27,255
Apr 2001685024.685.34$16,906
Mar 2001852024.545.38$20,908
Feb 2001841027.755.77$23,338
Jan 2001505027.478.40$13,872
Dec 2000841026.889.12$22,606
Nov 2000789032.215.66$25,414
Oct 2000686031.235.15$21,424
Sep 2000861031.875.19$27,440
Aug 2000860029.644.54$25,490
Jul 2000843028.534.09$24,051
Jun 2000839029.304.40$24,583
May 2000678027.263.68$18,482
Apr 2000847024.513.12$20,760
Mar 2000852028.422.86$24,214
Feb 2000839027.622.73$23,173
Jan 2000681025.272.48$17,209
Dec 1999858024.282.42$20,832
Nov 1999694023.192.43$16,094
Oct 1999872020.982.80$18,295
Sep 1999873021.752.62$18,988
Aug 1999853019.262.88$16,429
Jul 1999687017.892.37$12,290
Jun 1999856015.942.36$13,645
May 1999870015.792.32$13,737
Apr 1999852015.102.21$12,865
Mar 1999839012.471.84$10,462
Feb 199967309.981.82$6,717
Jan 1999857010.381.90$8,896
Dec 199884209.201.77$7,746
Nov 1998693010.892.19$7,547
Oct 1998869012.421.97$10,793
Sep 1998705012.592.08$8,876
Aug 1998847011.301.91$9,571
Jul 1998860011.742.24$10,096
Jun 1998847011.242.24$9,520
May 1998849012.622.21$10,714
Apr 1998861013.042.51$11,227
Mar 1998851012.802.31$10,893
Feb 1998682013.952.30$9,514
Jan 1998679014.702.15$9,981
Dec 19971,007016.322.41$16,434
Nov 1997679018.193.09$12,351
Oct 19971,024019.253.15$19,712
Sep 1997680017.742.95$12,063
Aug 1997836017.862.55$14,931
Jul 19971,032017.582.25$18,143
Jun 1997697017.242.26$12,016
May 1997739018.972.31$14,019
Apr 1997935017.882.08$16,718
Mar 1997908018.951.94$17,207
Feb 19971,074020.492.21$22,006
Jan 1997371023.483.54$8,711
Dec 1996916023.32$21,361
Nov 1996725021.97$15,928
Oct 1996736023.31$17,156
Sep 1996736022.22$16,354
Aug 1996721020.26$14,607
Jul 1996720019.55$14,076
Jun 19961,078018.73$20,191
May 1996721019.43$14,009
Apr 19969172421.51$19,725
Mar 19969052419.38$17,539
Feb 19965412116.98$9,186
Jan 19969142417.07$15,602
Dec 19957382417.19$12,686
Nov 19957322416.00$11,712
Oct 19959162515.43$14,134
Sep 19951,0752416.18$17,394
Aug 19955522415.92$8,788
Jul 19957282515.24$11,095
Jun 19951,0642316.41$17,460
May 19957262617.56$12,749
Apr 19958482517.73$15,035
Mar 19957212516.44$11,853
Feb 19957172316.58$11,888
Jan 19958942415.92$14,232
Dec 19947212615.03$10,837
Nov 19947192415.90$11,432
Oct 19941,0312515.58$16,063
Sep 19947122515.29$10,886
Aug 19941,0562516.13$17,033
Jul 19941,0532517.56$18,491
Jun 19945292517.09$9,041
May 19941,0712615.88$17,007
Apr 19945082614.14$7,183
Mar 19941,0782712.46$13,432
Feb 19945262112.50$6,575
Jan 19948982512.66$11,369
Dec 19931,0822512.33$13,341
Nov 19935252514.49$7,607
Oct 19931,2272515.85$19,448
Sep 19938852515.03$13,302
Aug 19931,0622515.66$16,631
Jul 19935352615.46$8,271
Jun 19934912616.79$8,244
May 19939952617.68$17,592
Apr 19931,0482518.05$18,916
Mar 19931,0462818.14$18,974
Feb 19935092217.90$9,111
Jan 19935422616.93$9,176

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                  717 bbl  × $106.41 =    $76,296
Casinghead gas         1 Mcf  × $  3.05 =         $3

────────────────────────────────────────────────────
Month total                                  $76,299

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. 8A/O/18666 is the state's own key, not one this site invented.