MANSFIELD "CS"

Operated by STEPHENS & JOHNSON OPERATING CO. (P-5 817555) in the LAMBERT 2 (CISCO) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 4543District 10Field 51718500OilCasinghead gasSaveExport
Value, all time
$9.8 M
Jan 1993 – May 2026
Value, last 12 filed months
$171 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 4 leases and 13 wells, and the rule below applies to all of them.

Discovered
1979-10-04
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 Commission's schedule remark for this field reads: RULES EFF. 8-17-81

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
OilDisposition297,113 bbl$9,777,953
Casinghead gasProduction29,365 Mcf$30,105
Total$9,808,058

19,478 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 (7)

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 35.4368, -102.4579. A lease has no coordinate of its own — that point is the mean of its wells, and they span 1.1 miles.

35.43727, -102.45773 · 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
57.1%
4 of 7 wells
With a plug date
57.1%
4 of 7 wells
Median depth
6,800 ft
7 wells filed one
Completion to plug
6.8 years
median over 4 wells

What the state filed about each well

On the RRC proration schedule
457.1%
A plug date is filed
457.1%
BothOn the schedule and plugged. Neither fact cancels the other.
457.1%
NeitherNo plug date, and not on the schedule.
342.9%

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

Between 6,400 and 6,954 ft, median 6,800 ft, over the 7 wells that filed a depth.

Completions filed
Mar 1980 – Nov 1992
7 of 7 wells
Plug dates filed
Dec 1988
4 of 7 wells; 3 filed none

Last completion to plug: a median of 6.8 years across the 4 wells that filed both dates, with the middle half between 6.4 years and 7.0 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

7 wells

42-3593028276,400 ftNov 1992
42-3593014046,774 ftSep 1983Dec 1988Yes
42-3593014456,600 ftFeb 1982Dec 1988Yes
42-3593015166,800 ftFeb 1982Dec 1988Yes
42-3593013236,913 ftNov 1981
42-3593012926,910 ftAug 1981Dec 1988Yes
42-3593011816,954 ftMar 1980

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 20261870106.413.05$19,899
Apr 2026189098.932.87$18,698
Mar 2026188089.753.15$16,873
Feb 2026190063.503.75$12,065
Jan 2026375059.138.00$22,174
Dec 2025192056.664.41$10,879
Nov 2025189058.593.93$11,074
Oct 2025378059.383.30$22,446
Sep 20250062.743.08$0
Aug 2025377063.933.01$24,102
Jul 20250066.743.32$0
Jun 2025186066.483.13$12,365
May 2025377060.553.23$22,827
Apr 2025190062.363.54$11,848
Mar 2025191067.704.27$12,931
Feb 2025192070.884.34$13,609
Jan 2025188074.324.28$13,972
Dec 2024382068.993.12$26,354
Nov 20240069.052.20$0
Oct 2024189071.372.28$13,489
Sep 2024187069.612.36$13,017
Aug 2024189075.632.06$14,294
Jul 2024186079.932.15$14,867
Jun 2024186078.082.63$14,523
May 2024194078.812.20$15,289
Apr 2024190084.451.66$16,046
Mar 2024188080.301.55$15,096
Feb 2024379076.091.78$28,838
Jan 2024193073.023.30$14,093
Dec 2023191071.262.61$13,611
Nov 2023192077.892.81$14,955
Oct 2023190085.443.09$16,234
Sep 2023189089.042.74$16,829
Aug 2023186080.522.67$14,977
Jul 2023187074.852.64$13,997
Jun 2023378068.962.26$26,067
May 20230070.622.23$0
Apr 2023381078.122.24$29,764
Mar 2023380072.852.39$27,683
Feb 2023192075.112.47$14,421
Jan 2023191076.533.39$14,617
Dec 2022186076.415.73$14,212
Nov 202237085.005.65$3,145
Oct 2022190087.185.86$16,564
Sep 2022188084.888.16$15,957
Aug 2022188094.529.13$17,770
Jul 20221870101.587.54$18,995
Jun 20223740115.097.98$43,044
May 20221870109.378.43$20,452
Apr 20221890104.226.84$19,698
Mar 20221900108.885.08$20,687
Feb 2022192091.054.86$17,482
Jan 20220081.844.54$0
Dec 2021381071.323.90$27,173
Nov 2021191077.435.24$14,789
Oct 2021189079.795.71$15,080
Sep 2021378069.865.35$26,407
Aug 2021376066.024.22$24,824
Jul 2021372070.783.98$26,330
Jun 2021379069.493.38$26,337
May 2021190063.483.02$12,061
Apr 2021563060.362.76$33,983
Mar 2021380061.302.72$23,294
Feb 2021189057.805.55$10,924
Jan 20210050.412.81$0
Dec 2020195044.642.68$8,705
Nov 20200038.772.71$0
Oct 20200036.972.48$0
Sep 2020563037.091.99$20,882
Aug 2020367039.982.39$14,673
Jul 20200038.371.83$0
Jun 20200034.901.69$0
May 20200016.921.81$0
Apr 20200014.751.80$0
Mar 2020181030.341.86$5,492
Feb 2020186049.881.98$9,278
Jan 2020187057.252.09$10,706
Dec 2019186059.012.30$10,976
Nov 2019185055.302.75$10,231
Oct 2019192053.472.42$10,266
Sep 2019186055.052.66$10,239
Aug 2019189053.112.30$10,038
Jul 2019183056.272.46$10,297
Jun 2019369052.782.49$19,476
May 2019183058.482.74$10,702
Apr 2019186062.632.75$11,649
Mar 2019187056.803.06$10,622
Feb 2019183050.852.79$9,306
Jan 2019384046.033.23$17,676
Dec 20180046.594.19$0
Nov 2018187052.934.24$9,898
Oct 2018371061.443.40$22,794
Sep 2018374059.543.11$22,268
Aug 20180059.403.07$0
Jul 2018190065.142.93$12,377
Jun 2018187060.183.08$11,254
May 2018375065.382.90$24,518
Apr 20180063.842.90$0
Mar 2018384061.222.79$23,508
Feb 2018188061.782.77$11,615
Jan 2018371062.874.01$23,325
Dec 2017167057.272.92$9,564
Nov 2017191055.423.12$10,585
Oct 2017376049.292.98$18,533
Sep 20170047.523.09$0
Aug 2017182045.373.00$8,257
Jul 2017371043.873.09$16,276
Jun 2017184042.493.09$7,818
May 2017185045.373.26$8,393
Apr 2017184047.933.21$8,819
Mar 2017376046.772.98$17,586
Feb 2017184050.452.95$9,283
Jan 20170049.413.42$0
Dec 2016181048.763.72$8,826
Nov 2016370042.492.64$15,721
Oct 2016181046.193.09$8,360
Sep 2016363041.553.10$15,083
Aug 2016188041.442.92$7,791
Jul 2016360041.622.92$14,983
Jun 2016362045.352.69$16,417
May 2016186042.521.99$7,909
Apr 2016182036.561.99$6,654
Mar 2016380033.011.79$12,544
Feb 2016184026.472.06$4,870
Jan 2016190027.352.36$5,197
Dec 2015380032.362.00$12,297
Nov 2015191038.792.17$7,409
Oct 2015194043.552.43$8,449
Sep 2015190042.992.76$8,168
Aug 2015187040.162.87$7,510
Jul 2015190048.152.95$9,149
Jun 2015172056.152.88$9,658
May 2015193055.212.96$10,656
Apr 2015569049.822.71$28,348
Mar 2015387042.892.93$16,598
Feb 2015188044.662.98$8,396
Jan 2015576043.433.10$25,016
Dec 2014570054.693.59$31,173
Nov 2014199070.464.25$14,022
Oct 2014388078.303.90$30,380
Sep 2014188086.164.05$16,198
Aug 2014370089.394.04$33,074
Jul 2014567096.564.18$54,750
Jun 2014187098.164.74$18,356
May 2014190094.734.73$17,999
Apr 2014569095.944.81$54,590
Mar 2014386095.895.06$37,014
Feb 2014574097.406.19$55,908
Jan 20140090.404.86$0
Dec 2013386091.824.35$35,443
Nov 2013196088.853.74$17,415
Oct 2013192097.423.78$18,705
Sep 20135740104.113.72$59,759
Aug 20137520104.253.52$78,396
Jul 20131880102.523.72$19,274
Jun 2013193094.403.93$18,219
May 2013378094.834.15$35,846
Apr 2013383093.964.28$35,987
Mar 2013567093.623.91$53,083
Feb 20130091.233.42$0
Jan 2013193091.603.42$17,679
Dec 20120086.773.42$0
Nov 2012771086.953.62$67,038
Oct 2012194089.383.40$17,340
Sep 2012175094.672.92$16,567
Aug 2012928092.662.91$85,988
Jul 2012566085.133.02$48,184
Jun 2012571079.822.52$45,577
May 2012376091.612.49$34,445
Apr 20123310101.652.00$33,646
Mar 20123830105.052.22$40,234
Feb 20125720101.102.57$57,829
Jan 2012382098.092.73$37,470
Dec 2011380096.873.24$36,811
Nov 2011383095.723.31$36,661
Oct 2011764084.983.65$64,925
Sep 20110083.623.99$0
Aug 2011377083.404.15$31,442
Jul 20110094.144.52$0
Jun 2011177092.904.64$16,443
May 2011382098.134.40$37,486
Apr 20117580105.964.33$80,318
Mar 2011192096.364.06$18,501
Feb 2011374085.644.18$32,029
Jan 2011383086.504.59$33,130
Dec 20100085.734.35$0
Nov 2010579080.843.80$46,806
Oct 2010768078.103.51$59,981
Sep 2010188072.633.98$13,654
Aug 2010178073.684.42$13,115
Jul 2010384072.554.74$27,859
Jun 2010373070.364.91$26,244
May 2010565071.124.24$40,183
Apr 2010558081.694.12$45,583
Mar 2010720078.394.39$56,441
Feb 20100073.585.44$0
Jan 2010383074.365.96$28,480
Dec 2009197071.445.48$14,074
Nov 2009579074.593.75$43,188
Oct 2009192072.544.11$13,928
Sep 2009375065.543.06$24,578
Aug 2009964067.423.22$64,993
Jul 20090061.133.46$0
Jun 2009579066.163.90$38,307
May 2009390054.743.93$21,349
Apr 2009386046.773.59$18,053
Mar 2009775042.144.06$32,659
Feb 2009196032.814.63$6,431
Jan 2009585035.865.37$20,978
Dec 2008579037.105.98$21,481
Nov 2008390055.496.86$21,641
Oct 2008392075.246.92$29,494
Sep 20087730101.767.88$78,660
Aug 20085770114.228.48$65,905
Jul 20081970131.0811.39$25,823
Jun 20085780131.3313.03$75,909
May 20081,3600123.1711.57$167,511
Apr 200800110.3110.45$0
Mar 20081930101.909.66$19,667
Feb 2008193092.538.77$17,858
Jan 2008797090.388.21$72,033
Dec 2007402088.337.30$35,509
Nov 2007195091.677.29$17,876
Oct 2007394082.856.92$32,643
Sep 2007388075.846.24$29,426
Aug 2007584069.066.39$40,331
Jul 2007393070.906.39$27,864
Jun 2007396062.007.55$24,552
May 2007973058.747.85$57,154
Apr 2007596059.617.81$35,528
Mar 2007395056.927.30$22,483
Feb 20070055.108.22$0
Jan 2007404050.306.73$20,321
Dec 2006181056.656.92$10,254
Nov 2006361054.207.62$19,566
Oct 2006549054.906.01$30,140
Sep 2006364060.085.04$21,869
Aug 20060068.717.34$0
Jul 2006365069.376.34$25,320
Jun 2006551066.286.38$36,520
May 2006369066.016.42$24,358
Apr 2006545064.397.36$35,093
Mar 2006720056.707.08$40,824
Feb 2006358057.597.75$20,617
Jan 2006543060.598.93$32,900
Dec 2005541054.9413.42$29,723
Nov 2005363054.6910.59$19,852
Oct 2005537058.3413.80$31,329
Sep 2005533061.4512.08$32,753
Aug 2005168061.519.80$10,334
Jul 2005510055.697.84$28,402
Jun 2005493052.337.38$25,799
May 2005304045.226.65$13,747
Apr 2005330049.207.36$16,236
Mar 2005501050.377.15$25,235
Feb 2005499045.226.31$22,565
Jan 2005327043.166.32$14,113
Dec 2004905039.866.75$36,073
Nov 2004175045.286.33$7,924
Oct 2004699049.706.52$34,740
Sep 20040043.245.28$0
Aug 2004391042.375.55$16,567
Jul 2004772038.286.08$29,552
Jun 2004189036.106.43$6,823
May 2004774037.486.49$29,010
Apr 2004760034.475.86$26,197
Mar 2004348034.365.53$11,957
Feb 2004969032.455.51$31,444
Jan 20040032.036.30$0
Dec 2003581030.266.30$17,581
Nov 2003194028.804.60$5,587
Oct 2003399028.174.76$11,240
Sep 2003772026.314.75$20,311
Aug 2003192029.765.13$5,714
Jul 2003771029.415.17$22,675
Jun 2003199028.565.98$5,683
May 2003985026.595.97$26,191
Apr 2003578026.675.41$15,415
Mar 2003563031.146.10$17,532
Feb 2003579033.487.93$19,385
Jan 20031,147030.315.58$34,766
Dec 2002396026.914.85$10,656
Nov 2002392024.664.14$9,667
Oct 2002982026.464.23$25,984
Sep 2002590027.443.64$16,190
Aug 2002577025.963.16$14,979
Jul 2002776024.583.06$19,074
Jun 2002384023.733.34$9,112
May 2002764024.663.58$18,840
Apr 2002574023.653.51$13,575
Mar 2002771022.003.10$16,962
Feb 2002969018.222.38$17,655
Jan 2002785017.172.38$13,478
Dec 2001593016.932.36$10,039
Nov 200176611318.072.41$14,113
Oct 200177011019.782.53$15,509
Sep 200194010824.262.25$23,048
Aug 20011899024.873.05$4,975
Jul 20011,14516423.933.20$27,924
Jun 20011,33720624.563.82$33,625
May 200196112625.524.31$25,067
Apr 20011,15112424.685.34$29,068
Mar 20011,17818324.545.38$29,892
Feb 200198914427.755.77$28,275
Jan 200157511927.478.40$16,795
Dec 20007999826.889.12$22,371
Nov 200098710532.215.66$32,385
Oct 200077819131.235.15$25,280
Sep 200095018231.875.19$31,220
Aug 20001,50817629.644.54$45,496
Jul 20001,14317128.534.09$33,309
Jun 20001,34217529.304.40$40,090
May 20001,15819927.263.68$32,299
Apr 20001,53917424.513.12$38,263
Mar 20001,19421728.422.86$34,554
Feb 20001,18620327.622.73$33,311
Jan 20001,21016825.272.48$30,993
Dec 19991,21118424.282.42$29,849
Nov 199976812923.192.43$18,124
Oct 199998415420.982.80$21,076
Sep 19991,17815321.752.62$26,022
Aug 19991,16917819.262.88$23,027
Jul 19991,17116417.892.37$21,338
Jun 19991,17313815.942.36$19,024
May 199977212215.792.32$12,473
Apr 199959716715.102.21$9,383
Mar 19991,7739812.471.84$22,289
Feb 19995791099.981.82$5,977
Jan 1999011410.381.90$217
Dec 19985781329.201.77$5,552
Nov 199858910010.892.19$6,633
Oct 19982,29212912.421.97$28,721
Sep 19981,08013512.592.08$13,878
Aug 199836510911.301.91$4,332
Jul 199854417611.742.24$6,780
Jun 199818110911.242.24$2,278
May 19981,27514712.622.21$16,415
Apr 19981,28114713.042.51$17,073
Mar 199891917912.802.31$12,177
Feb 19981,48221113.952.30$21,159
Jan 19981,83125214.702.15$27,459
Dec 19971,29925416.322.41$21,812
Nov 19971,65020418.193.09$30,644
Oct 19971,11019819.253.15$21,991
Sep 19971,80923017.742.95$32,771
Aug 19971,62424317.862.55$29,625
Jul 199789918317.582.25$16,216
Jun 19971,84218217.242.26$32,167
May 19971,28527118.972.31$25,002
Apr 19972,02827517.882.08$36,833
Mar 19972,04328418.951.94$39,266
Feb 19971,31123620.492.21$27,383
Jan 19971,52424523.483.54$36,651
Dec 19961,89927523.32$44,285
Nov 19961,49822821.97$32,911
Oct 19961,85727723.31$43,287
Sep 19962,04635722.22$45,462
Aug 19962,37226720.26$48,057
Jul 19962,20635119.55$43,127
Jun 19961,62222818.73$30,380
May 19962,19934319.43$42,727
Apr 19962,60238921.51$55,969
Mar 19962,81643219.38$54,574
Feb 19962,62136616.98$44,505
Jan 19962,65242417.07$45,270
Dec 19952,84837817.19$48,957
Nov 19952,60442716.00$41,664
Oct 19952,55130215.43$39,362
Sep 19952,01739016.18$32,635
Aug 19952,73931715.92$43,605
Jul 19952,37344715.24$36,165
Jun 19953,24533516.41$53,250
May 19952,56446517.56$45,024
Apr 19953,35249317.73$59,431
Mar 19952,60146616.44$42,760
Feb 19952,75741216.58$45,711
Jan 19952,76246415.92$43,971
Dec 19943,32949215.03$50,035
Nov 19942,58433715.90$41,086
Oct 19942,03326815.58$31,674
Sep 19942,90445115.29$44,402
Aug 19942,93344716.13$47,309
Jul 19942,88243217.56$50,608
Jun 19942,53936517.09$43,392
May 19943,31654715.88$52,658
Apr 19943,31445314.14$46,860
Mar 19943,57256912.46$44,507
Feb 19943,09246512.50$38,650
Jan 19942,92844212.66$37,068
Dec 19934,01361712.33$49,480
Nov 19933,46951514.49$50,266
Oct 19933,14250815.85$49,801
Sep 19933,84359115.03$57,760
Aug 19933,23450015.66$50,644
Jul 19932,06116815.46$31,863
Jun 19931,47732816.79$24,799
May 19932,43538417.68$43,051
Apr 19932,60533818.05$47,020
Mar 19932,63041118.14$47,708
Feb 19931,71313917.90$30,663
Jan 19935,80487816.93$98,262

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                  187 bbl  × $106.41 =    $19,899
Casinghead gas         0 Mcf  × $  3.05 =         $0

────────────────────────────────────────────────────
Month total                                  $19,899

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. 10/O/4543 is the state's own key, not one this site invented.