SHIRK, MARY K.

Operated by SOUTHWEST ROYALTIES, INC. (P-5 806470) in the AMACKER-TIPPETT, S. (BEND) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 4326District 7CField 02212111OilCasinghead gasSaveExport
Value, all time
$2.7 M
Jan 1993 – May 2026
Value, last 12 filed months
$447
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 20 leases and 45 wells, and the rule below applies to all of them.

Discovered
1961-12-24
as the register files it
Field class
Oil and gas
the register's own label
Between wells
1,320 ft
minimum
From a lease line
650 ft
minimum

A drilling unit in this field needs at least 80 acres. The field rule took effect on 1967-09-01.

The Commission's schedule remark for this field reads: OPTIONAL 80 ACRE UNITS /DIAG 3200'

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
OilDisposition45,970 bbl$1,780,725
Casinghead gasProduction252,270 Mcf$873,056
Total$2,653,781

39,882 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 (4)

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 31.2750, -102.0730. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.6 miles.

31.27416, -102.07381 · 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
25.0%
1 of 4 wells
With a plug date
25.0%
1 of 4 wells
Median depth
10,250 ft
3 wells filed one
Completion to plug
6.0 years
median over 1 well

What the state filed about each well

On the RRC proration schedule
125.0%
A plug date is filed
125.0%
BothOn the schedule and plugged. Neither fact cancels the other.
125.0%
NeitherNo plug date, and not on the schedule.
375.0%

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

Between 10,100 and 10,365 ft, median 10,250 ft, over the 3 wells that filed a depth.

Completions filed
Dec 1979 – Apr 2005
3 of 4 wells; 1 filed none
Plug dates filed
Dec 1985
1 of 4 wells; 3 filed none

Last completion to plug: a median of 6.0 years across the 1 well that filed both dates, with the middle half between 6.0 years and 6.0 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

4 wells

42-461102944
42-46110291210,100 ftApr 2005
42-46110177110,250 ftApr 2003
42-46110292310,365 ftDec 1979Dec 1985Yes

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 202601106.413.05$3
Apr 20260298.932.87$6
Mar 20260989.753.15$28
Feb 20260663.503.75$23
Jan 202601359.138.00$104
Dec 20250756.664.41$31
Nov 202501258.593.93$47
Oct 202502359.383.30$76
Sep 202501562.743.08$46
Aug 202501763.933.01$51
Jul 20250366.743.32$10
Jun 20250766.483.13$22
May 20250260.553.23$6
Apr 2025173762.363.54$10,813
Mar 20250867.704.27$34
Feb 20250970.884.34$39
Jan 20250974.324.28$39
Dec 20240068.993.12$0
Nov 202401369.052.20$29
Oct 20240671.372.28$14
Sep 20240069.612.36$0
Aug 20240075.632.06$0
Jul 20240879.932.15$17
Jun 202401078.082.63$26
May 202402878.812.20$62
Apr 20240884.451.66$13
Mar 202401780.301.55$26
Feb 202402676.091.78$46
Jan 202401873.023.30$59
Dec 202317522871.262.61$13,066
Nov 2023016777.892.81$469
Oct 2023015285.443.09$469
Sep 202309489.042.74$257
Aug 20230080.522.67$0
Jul 2023181874.852.64$13,569
Jun 202305568.962.26$124
May 2023020370.622.23$452
Apr 202317728678.122.24$14,467
Mar 2023031872.852.39$761
Feb 2023027175.112.47$668
Jan 2023034476.533.39$1,165
Dec 2022027676.415.73$1,581
Nov 2022029885.005.65$1,683
Oct 2022035387.185.86$2,070
Sep 202216912184.888.16$15,333
Aug 2022042594.529.13$3,879
Jul 20220447101.587.54$3,371
Jun 20222402115.097.98$3,437
May 2022175406109.378.43$22,564
Apr 20220406104.226.84$2,776
Mar 20220307108.885.08$1,558
Feb 202208891.054.86$428
Jan 202201581.844.54$68
Dec 202117539071.323.90$14,002
Nov 2021040677.435.24$2,126
Oct 2021042779.795.71$2,440
Sep 2021045669.865.35$2,440
Aug 202117642266.024.22$13,401
Jul 2021043270.783.98$1,720
Jun 2021033669.493.38$1,136
May 2021047663.483.02$1,436
Apr 202117238460.362.76$11,441
Mar 202113661.302.72$813
Feb 2021021357.805.55$1,182
Jan 202116528950.412.81$9,130
Dec 20201543144.642.68$1,823
Nov 20202442238.772.71$2,073
Oct 20201038636.972.48$1,326
Sep 2020321437.091.99$537
Aug 20201798739.982.39$7,364
Jul 202001938.371.83$35
Jun 2020028734.901.69$485
May 2020017116.921.81$310
Apr 2020040014.751.80$722
Mar 202018541630.341.86$6,385
Feb 2020034849.881.98$689
Jan 20201434457.252.09$1,522
Dec 2019436659.012.30$1,079
Nov 201919038355.302.75$11,561
Oct 2019036653.472.42$885
Sep 201916429755.052.66$9,817
Aug 2019027553.112.30$634
Jul 2019022156.272.46$544
Jun 2019053252.782.49$1,325
May 201901958.482.74$52
Apr 201942962.632.75$330
Mar 2019010756.803.06$328
Feb 201918410950.852.79$9,661
Jan 20191120546.033.23$1,168
Dec 2018018946.594.19$791
Nov 201818016952.934.24$10,243
Oct 2018024661.443.40$836
Sep 2018722059.543.11$1,101
Aug 2018228659.403.07$996
Jul 2018015765.142.93$460
Jun 201808360.183.08$255
May 201817612365.382.90$11,864
Apr 2018021063.842.90$609
Mar 2018128561.222.79$855
Feb 201817121361.782.77$11,154
Jan 20181015762.874.01$1,258
Dec 2017024057.272.92$701
Nov 2017224055.423.12$859
Oct 201718520849.292.98$9,739
Sep 2017018847.523.09$580
Aug 2017015745.373.00$472
Jul 201715816643.873.09$7,444
Jun 2017025442.493.09$784
May 2017020245.373.26$659
Apr 2017357547.933.21$1,990
Mar 201717365546.772.98$10,046
Feb 2017059950.452.95$1,769
Jan 201717660949.413.42$10,778
Dec 2016059348.763.72$2,208
Nov 2016049842.492.64$1,317
Oct 2016077346.193.09$2,389
Sep 2016065341.553.10$2,025
Aug 201617460841.442.92$8,989
Jul 2016057441.622.92$1,679
Jun 2016053845.352.69$1,445
May 2016065042.521.99$1,294
Apr 201617768336.561.99$7,831
Mar 2016052233.011.79$936
Feb 201617660326.472.06$5,903
Jan 2016066527.352.36$1,572
Dec 201517745532.362.00$6,638
Nov 2015034038.792.17$737
Oct 2015171043.552.43$7,447
Sep 2015032642.992.76$899
Aug 2015039340.162.87$1,129
Jul 201517652448.152.95$10,018
Jun 201517666856.152.88$11,808
May 201516976555.212.96$11,591
Apr 20153411,35949.822.71$20,667
Mar 201516586442.892.93$9,612
Feb 2015016244.662.98$482
Jan 2015020643.433.10$639
Dec 2014024854.693.59$891
Nov 201416820270.464.25$12,696
Oct 2014019878.303.90$772
Sep 201408086.164.05$324
Aug 2014017289.394.04$694
Jul 2014015496.564.18$644
Jun 2014019798.164.74$933
May 201418419794.734.73$18,361
Apr 2014020695.944.81$991
Mar 2014011595.895.06$582
Feb 201407997.406.19$489
Jan 20141769790.404.86$16,382
Dec 2013050291.824.35$2,186
Nov 2013081988.853.74$3,062
Oct 20131881,06697.423.78$22,344
Sep 20130940104.113.72$3,495
Aug 201301,023104.253.52$3,604
Jul 20131891,288102.523.72$24,165
Jun 201301,29294.403.93$5,082
May 20131851,34994.834.15$23,141
Apr 201301,30093.964.28$5,567
Mar 20131731,16593.623.91$20,755
Feb 201301,06391.233.42$3,635
Jan 20131771,05691.603.42$19,825
Dec 201201,40186.773.42$4,792
Nov 201217599386.953.62$18,816
Oct 2012175089.383.40$15,642
Sep 201201,40794.672.92$4,106
Aug 20121761,47892.662.91$20,606
Jul 201201,49285.133.02$4,507
Jun 20121741,55279.822.52$17,798
May 201201,43691.612.49$3,573
Apr 20121767,181101.652.00$32,229
Mar 201201,369105.052.22$3,042
Feb 201201,430101.102.57$3,675
Jan 20123551,48698.092.73$38,885
Dec 20111761,54296.873.24$22,045
Nov 20110095.723.31$0
Oct 201102,40484.983.65$8,771
Sep 201101,66083.623.99$6,616
Aug 201108183.404.15$336
Jul 201101,13094.144.52$5,104
Jun 20111821,71692.904.64$24,870
May 20111871,66698.134.40$25,689
Apr 201101,259105.964.33$5,456
Mar 20111821,57396.364.06$23,920
Feb 20111731,04685.644.18$19,188
Jan 201101,41186.504.59$6,475
Dec 20101811,23985.734.35$20,904
Nov 20101701,01280.843.80$17,584
Oct 201001,05378.103.51$3,695
Sep 2010098172.633.98$3,904
Aug 201016885273.684.42$16,144
Jul 2010071872.554.74$3,401
Jun 2010041470.364.91$2,033
May 201018158771.124.24$15,359
Apr 201017263381.694.12$16,660
Mar 201034389878.394.39$30,829
Feb 2010018073.585.44$980
Jan 2010016074.365.96$954
Dec 2009047271.445.48$2,588
Nov 2009051474.593.75$1,928
Oct 200917860372.544.11$15,391
Sep 2009058265.543.06$1,784
Aug 200917161067.423.22$13,492
Jul 2009066261.133.46$2,294
Jun 2009057466.163.90$2,236
May 200916866954.743.93$11,823
Apr 2009063446.773.59$2,274
Mar 200917262542.144.06$9,785
Feb 2009050632.814.63$2,344
Jan 2009056235.865.37$3,019
Dec 200818055237.105.98$9,977
Nov 2008048955.496.86$3,355
Oct 200817158375.246.92$16,902
Sep 20080369101.767.88$2,907
Aug 2008359613114.228.48$46,205
Jul 20080615131.0811.39$7,005
Jun 2008175615131.3313.03$30,998
May 20080608123.1711.57$7,037
Apr 20080570110.3110.45$5,959
Mar 2008175569101.909.66$23,331
Feb 2008052092.538.77$4,561
Jan 200818155390.388.21$20,897
Dec 2007053388.337.30$3,892
Nov 2007049291.677.29$3,588
Oct 200718052882.856.92$18,568
Sep 200717552075.846.24$16,519
Aug 2007059169.066.39$3,775
Jul 200717547070.906.39$15,410
Jun 2007051162.007.55$3,857
May 200717656658.747.85$14,779
Apr 2007069759.617.81$5,440
Mar 200717671656.927.30$15,246
Feb 200717562855.108.22$14,802
Jan 2007068350.306.73$4,594
Dec 200635970256.656.92$25,194
Nov 2006066154.207.62$5,035
Oct 200617770354.906.01$13,945
Sep 200617768660.085.04$14,090
Aug 200617472768.717.34$17,292
Jul 2006075169.376.34$4,763
Jun 200617470566.286.38$16,033
May 200618160766.016.42$15,848
Apr 200635559564.397.36$27,238
Mar 2006067356.707.08$4,767
Feb 2006057957.597.75$4,488
Jan 200635064460.598.93$26,960
Dec 200517962754.9413.42$18,246
Nov 200534766954.6910.59$26,061
Oct 2005054958.3413.80$7,574
Sep 200534545361.4512.08$26,672
Aug 200518045061.519.80$15,480
Jul 200519347155.697.84$14,443
Jun 200519476952.337.38$15,828
May 200575459745.226.65$38,067
Apr 200539263449.207.36$23,953
Mar 2005138250.377.15$2,784
Feb 200519335145.226.31$10,943
Jan 2005040943.166.32$2,586
Dec 2004042839.866.75$2,889
Nov 200419645445.286.33$11,749
Oct 200418952949.706.52$12,840
Sep 2004052843.245.28$2,790
Aug 200417952642.375.55$10,504
Jul 2004031138.286.08$1,892
Jun 2004049536.106.43$3,184
May 200417863537.486.49$10,796
Apr 2004080934.475.86$4,739
Mar 2004080034.365.53$4,424
Feb 200418369632.455.51$9,773
Jan 2004078732.036.30$4,958
Dec 200317775030.266.30$10,082
Nov 200318270228.804.60$8,467
Oct 2003045428.174.76$2,161
Sep 2003024226.314.75$1,149
Aug 200317737929.765.13$7,212
Jul 2003043229.415.17$2,234
Jun 200317655028.565.98$8,317
May 2003057726.595.97$3,446
Apr 200318665526.675.41$8,502
Mar 2003062331.146.10$3,798
Feb 200318267533.487.93$11,443
Jan 2003074430.315.58$4,153
Dec 200217970726.914.85$8,249
Nov 2002068124.664.14$2,817
Oct 20023581,78726.464.23$17,030
Sep 2002021927.443.64$796
Aug 200218038625.963.16$5,894
Jul 2002038024.583.06$1,163
Jun 2002069323.733.34$2,313
May 200217872724.663.58$6,995
Apr 2002087323.653.51$3,066
Mar 200218499722.003.10$7,141
Feb 200218675018.222.38$5,171
Jan 2002066317.172.38$1,575
Dec 2001092016.932.36$2,175
Nov 20011861,17118.072.41$6,178
Oct 2001049519.782.53$1,252
Sep 200118029724.262.25$5,035
Aug 2001049224.873.05$1,502
Jul 200118092923.933.20$7,277
Jun 2001079924.563.82$3,056
May 200117874825.524.31$7,764
Apr 200117995924.685.34$9,534
Mar 2001072524.545.38$3,898
Feb 200118080027.755.77$9,609
Jan 200117685327.478.40$11,999
Dec 2000068626.889.12$6,258
Nov 200018175732.215.66$10,113
Oct 200018284731.235.15$10,042
Sep 2000085631.875.19$4,440
Aug 200017689629.644.54$9,285
Jul 200017787428.534.09$8,624
Jun 2000088829.304.40$3,905
May 200036380327.263.68$12,850
Apr 2000084024.513.12$2,617
Mar 200018478228.422.86$7,466
Feb 200018189627.622.73$7,442
Jan 20001801,22225.272.48$7,580
Dec 199918083324.282.42$6,389
Nov 1999043923.192.43$1,069
Oct 199918467920.982.80$5,764
Sep 19991781,09121.752.62$6,729
Aug 19997082,09819.262.88$19,669
Jul 19991831,21917.892.37$6,166
Jun 199917976915.942.36$4,670
May 199918688715.792.32$4,996
Apr 1999176015.102.21$1,693
Mar 1999178412.471.84$1,454
Feb 19991856739.981.82$3,070
Jan 1999676510.381.90$1,516
Dec 19981847179.201.77$2,964
Nov 1998094910.892.19$2,074
Oct 19981791,02512.421.97$4,242
Sep 19981071,25112.592.08$3,952
Aug 19981851,13111.301.91$4,248
Jul 19981751,15911.742.24$4,648
Jun 19981811,12511.242.24$4,551
May 19981781,09412.622.21$4,660
Apr 19983581,14713.042.51$7,542
Mar 1998097312.802.31$2,247
Feb 19983611,17613.952.30$7,740
Jan 19981851,28614.702.15$5,491
Dec 19971851,19216.322.41$5,893
Nov 19971841,05918.193.09$6,617
Oct 19971811,41819.253.15$7,951
Sep 19971791,40817.742.95$7,336
Aug 19973641,35017.862.55$9,950
Jul 199701,33617.582.25$3,002
Jun 19973601,16017.242.26$8,825
May 19971841,25818.972.31$6,395
Apr 19971851,31717.882.08$6,051
Mar 19971831,16218.951.94$5,721
Feb 19973691,00020.492.21$9,767
Jan 199718579523.483.54$7,158
Dec 199618994123.32$4,407
Nov 199617984121.97$3,933
Oct 199637389723.31$8,695
Sep 199617885122.22$3,955
Aug 199618093720.26$3,647
Jul 199618285419.55$3,558
Jun 199636376618.73$6,799
May 199617973019.43$3,478
Apr 199618279021.51$3,915
Mar 199636582019.38$7,074
Feb 199618282316.98$3,090
Jan 199637388817.07$6,367
Dec 199537287817.19$6,395
Nov 1995081116.00$0
Oct 199537195515.43$5,725
Sep 199518581816.18$2,993
Aug 199536289915.92$5,763
Jul 199517986615.24$2,728
Jun 199536281916.41$5,940
May 19951791,10317.56$3,143
Apr 199552587817.73$9,308
Mar 199536280816.44$5,951
Feb 199517861616.58$2,951
Jan 199519970815.92$3,168
Dec 199418463915.03$2,766
Nov 199418468015.90$2,926
Oct 199436688315.58$5,702
Sep 199418084315.29$2,752
Aug 199453979316.13$8,694
Jul 199421290917.56$3,723
Jun 199436389617.09$6,204
May 199418159315.88$2,874
Apr 199435986914.14$5,076
Mar 199453367112.46$6,641
Feb 199418158712.50$2,263
Jan 199418492812.66$2,329
Dec 199354480412.33$6,708
Nov 199318279014.49$2,637
Oct 199354286715.85$8,591
Sep 199317880415.03$2,675
Aug 199353685815.66$8,394
Jul 199333597615.46$5,179
Jun 199337898216.79$6,347
May 199354370417.68$9,600
Apr 199318284618.05$3,285
Mar 19933891,07318.14$7,056
Feb 199393983017.90$16,808
Jan 199337776016.93$6,383

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                    0 bbl  × $106.41 =         $0
Casinghead gas         1 Mcf  × $  3.05 =         $3

────────────────────────────────────────────────────
Month total                                       $3

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. 7C/O/4326 is the state's own key, not one this site invented.