VOLLMERT

Operated by UNIT PETROLEUM COMPANY (P-5 877099) in the MENDOTA, NW. (DOUGLAS, LO.) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 4129District 10Field 60462380NGPA filingOilCasinghead gasSaveExport
Value, all time
$1.9 M
Jan 1993 – May 2026
Value, last 12 filed months
$0
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 54 leases and 88 wells, and the rule below applies to all of them.

Discovered
1975-05-06
as the register files it
Field class
Oil and gas
the register's own label
Between wells
1,867 ft
minimum
From a lease line
933 ft
minimum

A drilling unit in this field needs at least 160 acres. The field rule took effect on 1977-06-27.

The Commission's schedule remark for this field reads: IN ORDER 10-65521.

Severance-tax incentive filings

Applications the operator filed to have this lease's gas taxed at a reduced state rate. A filing is an application, and this page never calls one a reduction that was granted.

ProgrammeFilingsWith an approval dateDatedDocket
NGPA1none

This says nothing about a royalty. A severance tax is charged to the operator. Whether a reduced rate reaches a royalty owner depends on the wording of the lease instrument, which is a private contract this site does not hold.

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
OilDisposition15,705 bbl$482,624
Casinghead gasProduction444,407 Mcf$1,453,674
Total$1,936,299

130,802 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 (3)

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 35.8466, -100.5363. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.6 miles.

35.84743, -100.53706 · 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
66.7%
2 of 3 wells
With a plug date
33.3%
1 of 3 wells
Median depth
10,864 ft
3 wells filed one
Completion to plug
4.5 years
median over 1 well

What the state filed about each well

On the RRC proration schedule
266.7%
A plug date is filed
133.3%
BothOn the schedule and plugged. Neither fact cancels the other.
133.3%
NeitherNo plug date, and not on the schedule.
133.3%

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 7,380 and 11,447 ft, median 10,864 ft, over the 3 wells that filed a depth.

Completions filed
Aug 1981 – Jun 2013
3 of 3 wells
Plug dates filed
Feb 1986
1 of 3 wells; 2 filed none

Last completion to plug: a median of 4.5 years across the 1 well that filed both dates, with the middle half between 4.5 years and 4.5 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

3 wells

42-39380257111,447 ftJun 2013Yes
42-2113061327,380 ftMar 2012
42-21131224410,864 ftAug 1981Feb 1986Yes

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 20260098.932.87$0
Mar 20260089.753.15$0
Feb 20260063.503.75$0
Jan 20260059.138.00$0
Dec 20250056.664.41$0
Nov 20250058.593.93$0
Oct 20250059.383.30$0
Sep 20250062.743.08$0
Aug 20250063.933.01$0
Jul 20250066.743.32$0
Jun 20250066.483.13$0
May 20250060.553.23$0
Apr 20250062.363.54$0
Mar 20250067.704.27$0
Feb 20250070.884.34$0
Jan 20250074.324.28$0
Dec 20240068.993.12$0
Nov 20240069.052.20$0
Oct 20240071.372.28$0
Sep 20240069.612.36$0
Aug 20240075.632.06$0
Jul 20240079.932.15$0
Jun 20240078.082.63$0
May 20240078.812.20$0
Apr 20240084.451.66$0
Mar 20240080.301.55$0
Feb 20240076.091.78$0
Jan 20240073.023.30$0
Dec 20230071.262.61$0
Nov 20230077.892.81$0
Oct 20230085.443.09$0
Sep 20230089.042.74$0
Aug 20230080.522.67$0
Jul 20230074.852.64$0
Jun 20230068.962.26$0
May 20230070.622.23$0
Apr 20230078.122.24$0
Mar 20230072.852.39$0
Feb 20230075.112.47$0
Jan 20230076.533.39$0
Dec 20220076.415.73$0
Nov 20220085.005.65$0
Oct 20220087.185.86$0
Sep 20220084.888.16$0
Aug 20220094.529.13$0
Jul 202200101.587.54$0
Jun 202200115.097.98$0
May 202200109.378.43$0
Apr 202200104.226.84$0
Mar 202200108.885.08$0
Feb 20220091.054.86$0
Jan 20220081.844.54$0
Dec 20210071.323.90$0
Nov 20210077.435.24$0
Oct 20210079.795.71$0
Sep 20210069.865.35$0
Aug 20210066.024.22$0
Jul 20210070.783.98$0
Jun 20210069.493.38$0
May 20210063.483.02$0
Apr 20210060.362.76$0
Mar 20210061.302.72$0
Feb 20210057.805.55$0
Jan 20210050.412.81$0
Dec 20200044.642.68$0
Nov 20200038.772.71$0
Oct 20200036.972.48$0
Sep 20200037.091.99$0
Aug 20200039.982.39$0
Jul 20200038.371.83$0
Jun 20200034.901.69$0
May 20200016.921.81$0
Apr 20200014.751.80$0
Mar 20200030.341.86$0
Feb 20200049.881.98$0
Jan 20200057.252.09$0
Dec 20190059.012.30$0
Nov 20190055.302.75$0
Oct 20190053.472.42$0
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 20160033.011.79$0
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 20140098.164.74$0
May 201488094.734.73$8,336
Apr 20140095.944.81$0
Mar 20140095.895.06$0
Feb 20140097.406.19$0
Jan 20140090.404.86$0
Dec 20130091.824.35$0
Nov 2013176088.853.74$15,638
Oct 20130097.423.78$0
Sep 201300104.113.72$0
Aug 201300104.253.52$0
Jul 20131801,761102.523.72$25,001
Jun 201301,54794.403.93$6,085
May 201301,60894.834.15$6,672
Apr 201301,70093.964.28$7,280
Mar 201301,51393.623.91$5,920
Feb 201301,44391.233.42$4,935
Jan 2013041291.603.42$1,409
Dec 2012076686.773.42$2,620
Nov 201201,06886.953.62$3,871
Oct 2012076089.383.40$2,584
Sep 201201,36994.672.92$3,995
Aug 201201,09292.662.91$3,176
Jul 2012078285.133.02$2,362
Jun 201201,01479.822.52$2,554
May 2012029391.612.49$729
Apr 20120571101.652.00$1,140
Mar 20120869105.052.22$1,931
Feb 20120640101.102.57$1,645
Jan 2012064298.092.73$1,755
Dec 2011074096.873.24$2,397
Nov 2011071895.723.31$2,378
Oct 2011071484.983.65$2,605
Sep 2011066883.623.99$2,663
Aug 2011072583.404.15$3,008
Jul 2011072294.144.52$3,261
Jun 2011071792.904.64$3,327
May 2011082398.134.40$3,625
Apr 2011172384105.964.33$19,889
Mar 2011073196.364.06$2,966
Feb 2011053685.644.18$2,240
Jan 2011057886.504.59$2,652
Dec 201001,28385.734.35$5,578
Nov 2010091580.843.80$3,473
Oct 201001,01778.103.51$3,569
Sep 2010096972.633.98$3,856
Aug 2010096373.684.42$4,256
Jul 2010082772.554.74$3,917
Jun 201001,04670.364.91$5,136
May 2010056671.124.24$2,397
Apr 201006081.694.12$247
Mar 2010075778.394.39$3,322
Feb 2010085373.585.44$4,642
Jan 2010068874.365.96$4,103
Dec 200901,02071.445.48$5,593
Nov 2009094074.593.75$3,526
Oct 2009084172.544.11$3,457
Sep 2009099065.543.06$3,034
Aug 20091681,02667.423.22$14,629
Jul 2009074361.133.46$2,574
Jun 2009061366.163.90$2,388
May 200901,03254.743.93$4,051
Apr 2009098046.773.59$3,516
Mar 2009092642.144.06$3,759
Feb 2009071632.814.63$3,317
Jan 200918680035.865.37$10,967
Dec 2008076437.105.98$4,567
Nov 200801,03555.496.86$7,100
Oct 200801,17875.246.92$8,154
Sep 200801,207101.767.88$9,508
Aug 200801,071114.228.48$9,085
Jul 200801,121131.0811.39$12,768
Jun 200801,102131.3313.03$14,362
May 20081691,080123.1711.57$33,316
Apr 200801,181110.3110.45$12,347
Mar 200801,193101.909.66$11,529
Feb 20082521,16192.538.77$33,500
Jan 200801,18390.388.21$9,707
Dec 200701,15888.337.30$8,456
Nov 20072011,19191.677.29$27,110
Oct 200701,24882.856.92$8,639
Sep 200701,21075.846.24$7,555
Aug 200701,24969.066.39$7,979
Jul 200701,26770.906.39$8,094
Jun 20071831,09462.007.55$19,604
May 2007084558.747.85$6,630
Apr 2007012259.617.81$952
Mar 2007098056.927.30$7,156
Feb 200701,20755.108.22$9,917
Jan 20071911,32850.306.73$18,541
Dec 200601,56056.656.92$10,793
Nov 200601,62054.207.62$12,340
Oct 200601,57654.906.01$9,478
Sep 200601,87460.085.04$9,440
Aug 20061881,70868.717.34$25,454
Jul 200601,71769.376.34$10,891
Jun 20061721,25566.286.38$19,412
May 2006081266.016.42$5,217
Apr 20061931,45464.397.36$23,129
Mar 200601,88256.707.08$13,330
Feb 200601,73457.597.75$13,440
Jan 200601,85860.598.93$16,598
Dec 200501,60654.9413.42$21,545
Nov 20051941,29354.6910.59$24,301
Oct 200501,53758.3413.80$21,204
Sep 2005080661.4512.08$9,736
Aug 2005097461.519.80$9,542
Jul 2005090255.697.84$7,075
Jun 2005099152.337.38$7,315
May 200501,37145.226.65$9,119
Apr 200501,69649.207.36$12,483
Mar 20051951,52250.377.15$20,712
Feb 2005093045.226.31$5,870
Jan 200501,41943.166.32$8,971
Dec 200401,56139.866.75$10,538
Nov 200402,09545.286.33$13,262
Oct 20041851,85849.706.52$21,300
Sep 200404,87343.245.28$25,748
Aug 20041554,65842.375.55$32,422
Jul 200403,38638.286.08$20,601
Jun 20041833,51836.106.43$29,238
May 200402,17437.486.49$14,119
Apr 200401,13834.475.86$6,667
Mar 20041304,57734.365.53$29,778
Feb 200402,35432.455.51$12,970
Jan 200401,38732.036.30$8,738
Dec 200301,84330.266.30$11,614
Nov 200318369328.804.60$8,455
Oct 200301,02328.174.76$4,869
Sep 200301,05126.314.75$4,992
Aug 20031841,11329.765.13$11,185
Jul 2003075729.415.17$3,914
Jun 2003058528.565.98$3,500
May 2003054726.595.97$3,267
Apr 200319156026.675.41$8,122
Mar 2003069531.146.10$4,237
Feb 200301,55133.487.93$12,293
Jan 20031962,28430.315.58$18,690
Dec 20021902,61826.914.85$17,820
Nov 200202,31224.664.14$9,565
Oct 200202,61526.464.23$11,059
Sep 20021862,18027.443.64$13,029
Aug 20021651,98125.963.16$10,552
Jul 200202,12924.583.06$6,518
Jun 200202,16023.733.34$7,211
May 200202,22124.663.58$7,960
Apr 20021323,56723.653.51$15,650
Mar 20022812,18322.003.10$12,955
Feb 200201,98318.222.38$4,711
Jan 200202,44717.172.38$5,813
Dec 20011692,33516.932.36$8,382
Nov 20011792,22718.072.41$8,592
Oct 200102,01919.782.53$5,106
Sep 200102,34624.262.25$5,282
Aug 200102,20824.873.05$6,741
Jul 20011793,79923.933.20$16,429
Jun 20013312,31124.563.82$16,967
May 200102,74525.524.31$11,824
Apr 20013722,86424.685.34$24,461
Mar 200102,24824.545.38$12,086
Feb 200101,93727.755.77$11,171
Jan 200102,15227.478.40$18,074
Dec 200002,36326.889.12$21,556
Nov 20001812,18132.215.66$18,170
Oct 200002,23131.235.15$11,480
Sep 20001792,18831.875.19$17,053
Aug 20001872,26829.644.54$15,841
Jul 200002,26628.534.09$9,267
Jun 200002,36229.304.40$10,386
May 200002,17727.263.68$8,011
Apr 20003382,19024.513.12$15,108
Mar 20001802,23228.422.86$11,499
Feb 200002,02927.622.73$5,532
Jan 200002,08625.272.48$5,174
Dec 199902,01824.282.42$4,891
Nov 199901,77323.192.43$4,315
Oct 19991391,73820.982.80$7,789
Sep 199901,69121.752.62$4,428
Aug 199901,75719.262.88$5,052
Jul 19991782,13217.892.37$8,242
Jun 19991861,94715.942.36$7,564
May 19991752,29915.792.32$8,099
Apr 199902,27015.102.21$5,012
Mar 199902,28312.471.84$4,197
Feb 19991772,0639.981.82$5,517
Jan 19991852,34910.381.90$6,383
Dec 199801,7089.201.77$3,029
Nov 199801,73210.892.19$3,786
Oct 19981841,70412.421.97$5,641
Sep 199801,98612.592.08$4,136
Aug 199801,35911.301.91$2,592
Jul 19981801,93611.742.24$6,445
Jun 19981782,23611.242.24$7,003
May 199801,97812.622.21$4,364
Apr 19983441,83113.042.51$9,073
Mar 199802,09512.802.31$4,838
Feb 19981881,84013.952.30$6,853
Jan 199801,80814.702.15$3,896
Dec 19971521,97016.322.41$7,231
Nov 199702,05918.193.09$6,359
Oct 19971851,86219.253.15$9,426
Sep 19971903,49317.742.95$13,692
Aug 199702,87917.862.55$7,355
Jul 199702,22617.582.25$5,002
Jun 19971822,29117.242.26$8,309
May 19971841,74218.972.31$7,512
Apr 19971902,30217.882.08$8,192
Mar 19971912,22718.951.94$7,938
Feb 19971812,29820.492.21$8,778
Jan 199702,53323.483.54$8,966
Dec 19961912,56823.32$4,454
Nov 199602,63021.97$0
Oct 19961812,51523.31$4,219
Sep 199602,25622.22$0
Aug 199601,23220.26$0
Jul 199601,07419.55$0
Jun 199601,56418.73$0
May 199601,89819.43$0
Apr 199602,21721.51$0
Mar 199602,23619.38$0
Feb 19963741,70116.98$6,351
Jan 19961791,86517.07$3,056
Dec 1995091417.19$0
Nov 199502,30616.00$0
Oct 19951782,34515.43$2,747
Sep 199501,95216.18$0
Aug 199501,25715.92$0
Jul 19951792,67015.24$2,728
Jun 199503,51416.41$0
May 19953513,24917.56$6,164
Apr 199507,97017.73$0
Mar 19952002,09816.44$3,288
Feb 199504,22316.58$0
Jan 199501,79815.92$0
Dec 199403,53015.03$0
Nov 19941822,77015.90$2,894
Oct 199403,45315.58$0
Sep 19943554,95115.29$5,428
Aug 199402,38316.13$0
Jul 19941762,22117.56$3,091
Jun 199402,45717.09$0
May 19942202,83915.88$3,494
Apr 199402,14014.14$0
Mar 19943501,49512.46$4,361
Feb 199401,78312.50$0
Jan 199402,16012.66$0
Dec 199302,29712.33$0
Nov 199302,95914.49$0
Oct 199303,11915.85$0
Sep 19931813,50415.03$2,720
Aug 19931814,03315.66$2,834
Jul 19931753,16615.46$2,706
Jun 19931803,37916.79$3,022
May 199303,76617.68$0
Apr 19935543,11718.05$10,000
Mar 19931853,76018.14$3,356
Feb 199302,73017.90$0
Jan 199304,73816.93$0

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 2014 — as filed, then multipliedworked
Oil                   88 bbl  × $ 94.73 =     $8,336
Casinghead gas         0 Mcf  × $  4.73 =         $0

────────────────────────────────────────────────────
Month total                                   $8,336

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/4129 is the state's own key, not one this site invented.