COX, THELMA

Operated by MAGNUM ENGINEERING COMPANY (P-5 521539) in the ACKERLY (DEAN SAND) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 18470District 8AField 00448200OilCasinghead gasSaveExport
Value, all time
$2.7 M
Jan 1993 – May 2026
Value, last 12 filed months
$185 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 350 leases and 843 wells, and the rule below applies to all of them.

Discovered
1954-06-29
as the register files it
Field class
Oil and gas
the register's own label
Between wells
900 ft
minimum
From a lease line
550 ft
minimum

A drilling unit in this field needs at least 40 acres. The field rule took effect on 2017-01-24.

The Commission's schedule remark for this field reads: RULES.

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
OilDisposition52,575 bbl$2,619,285
Casinghead gasProduction26,674 Mcf$122,192
Total$2,741,477

4,828 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 32.5306, -101.7655. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.0 miles.

32.53059, -101.76545 · 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
no depth filed
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.

1 well

42-115102551

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 202600106.413.05$0
Apr 2026177098.932.87$17,511
Mar 20260089.753.15$0
Feb 20260063.503.75$0
Jan 2026161059.138.00$9,520
Dec 2025185056.664.41$10,482
Nov 2025354058.593.93$20,741
Oct 2025179059.383.30$10,629
Sep 2025522062.743.08$32,750
Aug 2025367063.933.01$23,462
Jul 2025708066.743.32$47,252
Jun 2025184066.483.13$12,232
May 2025170060.553.23$10,294
Apr 20250062.363.54$0
Mar 2025136067.704.27$9,207
Feb 2025192070.884.34$13,609
Jan 2025189074.324.28$14,046
Dec 20240068.993.12$0
Nov 2024187069.052.20$12,912
Oct 2024182071.372.28$12,989
Sep 20240069.612.36$0
Aug 2024189075.632.06$14,294
Jul 2024187079.932.15$14,947
Jun 2024187078.082.63$14,601
May 20240078.812.20$0
Apr 2024192084.451.66$16,214
Mar 2024176080.301.55$14,133
Feb 2024187076.091.78$14,229
Jan 2024190073.023.30$13,874
Dec 2023187071.262.61$13,326
Nov 20230077.892.81$0
Oct 2023174085.443.09$14,867
Sep 2023239089.042.74$21,281
Aug 2023158080.522.67$12,722
Jul 2023185074.852.64$13,847
Jun 2023178068.962.26$12,275
May 2023175070.622.23$12,359
Apr 2023185078.122.24$14,452
Mar 2023184072.852.39$13,404
Feb 2023184075.112.47$13,820
Jan 2023179076.533.39$13,699
Dec 2022172076.415.73$13,143
Nov 2022352085.005.65$29,920
Oct 2022171087.185.86$14,908
Sep 2022259084.888.16$21,984
Aug 2022171094.529.13$16,163
Jul 20223390101.587.54$34,436
Jun 20223310115.097.98$38,095
May 20223270109.378.43$35,764
Apr 202200104.226.84$0
Mar 20221710108.885.08$18,618
Feb 2022175091.054.86$15,934
Jan 2022166081.844.54$13,585
Dec 20210071.323.90$0
Nov 2021162077.435.24$12,544
Oct 2021161079.795.71$12,846
Sep 2021158069.865.35$11,038
Aug 2021154066.024.22$10,167
Jul 2021153070.783.98$10,829
Jun 20210069.493.38$0
May 2021153063.483.02$9,712
Apr 2021161060.362.76$9,718
Mar 2021160061.302.72$9,808
Feb 20210057.805.55$0
Jan 2021161050.412.81$8,116
Dec 2020167044.642.68$7,455
Nov 2020169038.772.71$6,552
Oct 20200036.972.48$0
Sep 2020169037.091.99$6,268
Aug 2020167039.982.39$6,677
Jul 2020330038.371.83$12,662
Jun 2020180034.901.69$6,282
May 20200016.921.81$0
Apr 2020170014.751.80$2,508
Mar 20200030.341.86$0
Feb 2020192049.881.98$9,577
Jan 20200057.252.09$0
Dec 2019165059.012.30$9,737
Nov 2019169055.302.75$9,346
Oct 2019332053.472.42$17,752
Sep 20190055.052.66$0
Aug 20190053.112.30$0
Jul 20190056.272.46$0
Jun 20190052.782.49$0
May 20190058.482.74$0
Apr 20190062.632.75$0
Mar 20190056.803.06$0
Feb 20190050.852.79$0
Jan 20190046.033.23$0
Dec 20180046.594.19$0
Nov 20180052.934.24$0
Oct 20180061.443.40$0
Sep 20180059.543.11$0
Aug 20180059.403.07$0
Jul 20180065.142.93$0
Jun 20180060.183.08$0
May 20180065.382.90$0
Apr 20180063.842.90$0
Mar 20180061.222.79$0
Feb 20180061.782.77$0
Jan 20180062.874.01$0
Dec 20170057.272.92$0
Nov 20170055.423.12$0
Oct 20170049.292.98$0
Sep 20170047.523.09$0
Aug 20170045.373.00$0
Jul 20170043.873.09$0
Jun 20170042.493.09$0
May 20170045.373.26$0
Apr 20170047.933.21$0
Mar 20170046.772.98$0
Feb 20170050.452.95$0
Jan 20170049.413.42$0
Dec 20160048.763.72$0
Nov 20160042.492.64$0
Oct 20160046.193.09$0
Sep 20160041.553.10$0
Aug 20160041.442.92$0
Jul 20160041.622.92$0
Jun 20160045.352.69$0
May 20160042.521.99$0
Apr 20160036.561.99$0
Mar 201662033.011.79$2,047
Feb 20160026.472.06$0
Jan 20160027.352.36$0
Dec 20150032.362.00$0
Nov 20150038.792.17$0
Oct 20150043.552.43$0
Sep 20150042.992.76$0
Aug 20150040.162.87$0
Jul 20150048.152.95$0
Jun 20150056.152.88$0
May 20150055.212.96$0
Apr 20150049.822.71$0
Mar 20150042.892.93$0
Feb 20150044.662.98$0
Jan 20150043.433.10$0
Dec 20140054.693.59$0
Nov 20140070.464.25$0
Oct 20140078.303.90$0
Sep 20140086.164.05$0
Aug 20140089.394.04$0
Jul 20140096.564.18$0
Jun 2014201098.164.74$19,730
May 20140094.734.73$0
Apr 20140095.944.81$0
Mar 2014198095.895.06$18,986
Feb 20140097.406.19$0
Jan 20140090.404.86$0
Dec 2013202091.824.35$18,548
Nov 20130088.853.74$0
Oct 20130097.423.78$0
Sep 20131930104.113.72$20,093
Aug 20131960104.253.52$20,433
Jul 201300102.523.72$0
Jun 2013197094.403.93$18,597
May 20130794.834.15$29
Apr 2013192093.964.28$18,040
Mar 20130093.623.91$0
Feb 2013187091.233.42$17,060
Jan 20130091.603.42$0
Dec 20120086.773.42$0
Nov 2012188086.953.62$16,347
Oct 20120089.383.40$0
Sep 20121981194.672.92$18,777
Aug 201201992.662.91$55
Jul 20121971985.133.02$16,828
Jun 201202079.822.52$50
May 201219112991.612.49$17,819
Apr 2012189151101.652.00$19,513
Mar 20120127105.052.22$282
Feb 201220058101.102.57$20,369
Jan 20122023398.092.73$19,904
Dec 201102196.873.24$68
Nov 20111922195.723.31$18,448
Oct 201101484.983.65$51
Sep 20111862483.623.99$15,649
Aug 201102983.404.15$120
Jul 20111972494.144.52$18,654
Jun 201120225092.904.64$19,926
May 201119423598.134.40$20,072
Apr 20110238105.964.33$1,031
Mar 201118325896.364.06$18,681
Feb 2011189085.644.18$16,186
Jan 201117914686.504.59$16,153
Dec 201019415285.734.35$17,292
Nov 20101944380.843.80$15,846
Oct 20100078.103.51$0
Sep 2010198072.633.98$14,381
Aug 2010179073.684.42$13,189
Jul 20101072.554.74$73
Jun 2010198070.364.91$13,931
May 20100071.124.24$0
Apr 2010195081.694.12$15,930
Mar 2010195078.394.39$15,286
Feb 20100073.585.44$0
Jan 2010195074.365.96$14,500
Dec 2009200071.445.48$14,288
Nov 20090074.593.75$0
Oct 2009204072.544.11$14,798
Sep 2009202065.543.06$13,239
Aug 200967067.423.22$4,517
Jul 2009197061.133.46$12,043
Jun 20091166.163.90$70
May 20091866254.743.93$10,425
Apr 20092039946.773.59$9,849
Mar 20092011942.144.06$8,547
Feb 20090432.814.63$19
Jan 20091991335.865.37$7,206
Dec 20081971837.105.98$7,416
Nov 20082036255.496.86$11,690
Oct 200807775.246.92$533
Sep 2008176101101.767.88$18,705
Aug 2008168135114.228.48$20,334
Jul 20080125131.0811.39$1,424
Jun 2008178125131.3313.03$25,006
May 2008177132123.1711.57$23,329
Apr 2008166114110.3110.45$19,503
Mar 2008168111101.909.66$18,192
Feb 200807292.538.77$631
Jan 20081798690.388.21$16,884
Dec 20071799988.337.30$16,534
Nov 200717911091.677.29$17,211
Oct 20071689582.856.92$14,576
Sep 20071716075.846.24$13,343
Aug 20071705569.066.39$12,092
Jul 200703770.906.39$236
Jun 20071785,92062.007.55$55,723
May 2007177058.747.85$10,397
Apr 20073553159.617.81$21,404
Mar 200707756.927.30$562
Feb 20071796355.108.22$10,381
Jan 20071797350.306.73$9,495
Dec 200617810356.656.92$10,796
Nov 20061796854.207.62$10,220
Oct 20061848154.906.01$10,589
Sep 20061767760.085.04$10,962
Aug 200601268.717.34$88
Jul 20061659969.376.34$12,074
Jun 200617510066.286.38$12,237
May 20061684166.016.42$11,353
Apr 20061786664.397.36$11,947
Mar 200601956.707.08$135
Feb 20061766957.597.75$10,671
Jan 20061778060.598.93$11,439
Dec 20051738154.9413.42$10,591
Nov 20051789054.6910.59$10,688
Oct 200509158.3413.80$1,255
Sep 20051778361.4512.08$11,879
Aug 20051769461.519.80$11,747
Jul 200517610455.697.84$10,617
Jun 20051779152.337.38$9,934
May 20051689245.226.65$8,209
Apr 20051778149.207.36$9,305
Mar 20051761750.377.15$8,987
Feb 20051797745.226.31$8,580
Jan 20051817743.166.32$8,299
Dec 200417910639.866.75$7,851
Nov 20041767045.286.33$8,412
Oct 20041786149.706.52$9,244
Sep 200408043.245.28$423
Aug 20041777542.375.55$7,916
Jul 20041797038.286.08$7,278
Jun 20041735636.106.43$6,606
May 20041697737.486.49$6,834
Apr 20041777634.475.86$6,546
Mar 200409134.365.53$503
Feb 20041778332.455.51$6,201
Jan 20041819932.036.30$6,421
Dec 20031769530.266.30$5,924
Nov 20031789428.804.60$5,558
Oct 200317611028.174.76$5,481
Sep 200317811126.314.75$5,210
Aug 200317810129.765.13$5,815
Jul 200316811529.415.17$5,536
Jun 200333311428.565.98$10,193
May 200309526.595.97$567
Apr 20033315426.675.41$9,120
Mar 200316410831.146.10$5,765
Feb 20032038133.487.93$7,438
Jan 20032027030.315.58$6,513
Dec 20022007026.914.85$5,722
Nov 200219913924.664.14$5,482
Oct 200214911126.464.23$4,412
Sep 200218711027.443.64$5,531
Aug 200219110925.963.16$5,303
Jul 200217710224.583.06$4,663
Jun 200219723.733.34$348
May 20021799624.663.58$4,758
Apr 20023858123.653.51$9,390
Mar 200209822.003.10$304
Feb 20021979218.222.38$3,808
Jan 200218410717.172.38$3,413
Dec 200119810316.932.36$3,596
Nov 200118710418.072.41$3,629
Oct 200118810719.782.53$3,989
Sep 20011829524.262.25$4,629
Aug 20012008924.873.05$5,246
Jul 20011879923.933.20$4,791
Jun 200119010424.563.82$5,064
May 200117811825.524.31$5,051
Apr 200119224624.685.34$6,051
Mar 200120111924.545.38$5,572
Feb 200134611327.755.77$10,253
Jan 20011759027.478.40$5,563
Dec 200019611226.889.12$6,290
Nov 200016911932.215.66$6,117
Oct 200016213731.235.15$5,764
Sep 200017111831.875.19$6,062
Aug 200033712929.644.54$10,574
Jul 200017814928.534.09$5,688
Jun 200017015229.304.40$5,649
May 200016912727.263.68$5,074
Apr 200034111524.513.12$8,716
Mar 200017011528.422.86$5,160
Feb 200016910627.622.73$4,957
Jan 200017310425.272.48$4,630
Dec 199917211424.282.42$4,452
Nov 199927611823.192.43$6,688
Oct 199916812520.982.80$3,875
Sep 199917911821.752.62$4,202
Aug 199933812419.262.88$6,866
Jul 199918117.892.37$210
Jun 199934910815.942.36$5,818
May 199917411515.792.32$3,014
Apr 199917412615.102.21$2,906
Mar 19991739112.471.84$2,325
Feb 1999175849.981.82$1,899
Jan 19991769310.381.90$2,004
Dec 1998174939.201.77$1,766
Nov 19981759610.892.19$2,116
Oct 19983489712.421.97$4,513
Sep 19981739912.592.08$2,384
Aug 199817111511.301.91$2,152
Jul 19981798611.742.24$2,294
Jun 199817611011.242.24$2,224
May 199817411312.622.21$2,445
Apr 199834912313.042.51$4,859
Mar 199817312512.802.31$2,503
Feb 199817311613.952.30$2,680
Jan 199834110114.702.15$5,230
Dec 19971728816.322.41$3,019
Nov 199717324218.193.09$3,894
Oct 199734535619.253.15$7,763
Sep 199717435917.742.95$4,148
Aug 199708517.862.55$217
Jul 19970017.582.25$0
Jun 199717110717.242.26$3,190
May 1997172018.972.31$3,263
Apr 19971672117.882.08$3,030
Mar 1997337618.951.94$6,398
Feb 1997173020.492.21$3,545
Jan 19971673923.483.54$4,059
Dec 19961737323.32$4,034
Nov 199617012421.97$3,735
Oct 199617110723.31$3,986
Sep 199634519822.22$7,666
Aug 1996121720.26$20
Jul 199634427219.55$6,725
Jun 199616830518.73$3,147
May 199617224319.43$3,342
Apr 199624917821.51$5,356
Mar 199624118919.38$4,671
Feb 199622716816.98$3,854
Jan 199609317.07$0
Dec 19952465117.19$4,229
Nov 19952199716.00$3,504
Oct 199525111715.43$3,873
Sep 199524919616.18$4,029
Aug 1995028015.92$0
Jul 199523130815.24$3,520
Jun 199518911916.41$3,101
May 199503017.56$0
Apr 199524022117.73$4,255
Mar 199524612516.44$4,044
Feb 1995116516.58$17
Jan 19952327315.92$3,693
Dec 19942104015.03$3,156
Nov 19942105515.90$3,339
Oct 19942316215.58$3,599
Sep 199401515.29$0
Aug 19940016.13$0
Jul 19940117.56$0
Jun 1994210017.09$3,589
May 19940015.88$0
Apr 19940014.14$0
Mar 19940112.46$0
Feb 19940012.50$0
Jan 19940112.66$0
Dec 19930012.33$0
Nov 19930114.49$0
Oct 19930115.85$0
Sep 19930015.03$0
Aug 19932212215.66$3,461
Jul 199308815.46$0
Jun 1993028316.79$0
May 199325413317.68$4,491
Apr 19931987418.05$3,574
Mar 199301618.14$0
Feb 19930017.90$0
Jan 19932728616.93$4,605

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.

Apr 2026 — as filed, then multipliedworked
Oil                  177 bbl  × $ 98.93 =    $17,511
Casinghead gas         0 Mcf  × $  2.87 =         $0

────────────────────────────────────────────────────
Month total                                  $17,511

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/18470 is the state's own key, not one this site invented.