SHANNON ESTATE "37"

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

Oil lease lease 10579District 7CField 20078475NGPA filingOilCasinghead gasSaveExport
Value, all time
$259 k
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 3 leases and 5 wells, and the rule below applies to all of them.

Discovered
1984-03-07
as the register files it
Field class
Oil
the register's own label
Between wells
933 ft
minimum
From a lease line
660 ft
minimum

A drilling unit in this field needs at least 80 acres. The field rule took effect on 1987-06-01.

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
OilDisposition13,592 bbl$256,157
Casinghead gasProduction19,436 Mcf$2,484
Total$258,641

18,998 Mcf of this lease's gas, across 21 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 30.9436, -101.6881. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.6 miles.

30.94373, -101.68858 · 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
100.0%
3 of 3 wells
With a plug date
100.0%
3 of 3 wells
Median depth
7,400 ft
3 wells filed one
Completion to plug
20.6 years
median over 3 wells

What the state filed about each well

On the RRC proration schedule
3100.0%
A plug date is filed
3100.0%
BothOn the schedule and plugged. Neither fact cancels the other.
3100.0%
NeitherNo plug date, and not on the schedule.
00.0%

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 4,600 and 7,580 ft, median 7,400 ft, over the 3 wells that filed a depth.

Completions filed
Aug 1987 – Jul 1994
3 of 3 wells
Plug dates filed
Jan 1993 – Feb 2015
3 of 3 wells

Last completion to plug: a median of 20.6 years across the 3 wells that filed both dates, with the middle half between 13.0 years and 23.9 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

3 wells

42-1053471127,400 ftJul 1994Feb 2015Yes
42-1053490837,580 ftNov 1987Jan 2015Yes
42-1053511954,600 ftAug 1987Jan 1993Yes

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 20140094.734.73$0
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 20130088.853.74$0
Oct 20130097.423.78$0
Sep 201300104.113.72$0
Aug 201300104.253.52$0
Jul 201300102.523.72$0
Jun 20130094.403.93$0
May 20130094.834.15$0
Apr 20130093.964.28$0
Mar 20130093.623.91$0
Feb 20130091.233.42$0
Jan 20130091.603.42$0
Dec 20120086.773.42$0
Nov 20120086.953.62$0
Oct 20120089.383.40$0
Sep 20120094.672.92$0
Aug 20120092.662.91$0
Jul 20120085.133.02$0
Jun 20120079.822.52$0
May 20120091.612.49$0
Apr 201200101.652.00$0
Mar 201200105.052.22$0
Feb 201200101.102.57$0
Jan 20120098.092.73$0
Dec 20110096.873.24$0
Nov 20110095.723.31$0
Oct 20110084.983.65$0
Sep 20110083.623.99$0
Aug 20110083.404.15$0
Jul 20110094.144.52$0
Jun 20110092.904.64$0
May 20110098.134.40$0
Apr 201100105.964.33$0
Mar 20110096.364.06$0
Feb 20110085.644.18$0
Jan 20111086.504.59$87
Dec 20100085.734.35$0
Nov 20100080.843.80$0
Oct 20100078.103.51$0
Sep 20100072.633.98$0
Aug 20100073.684.42$0
Jul 20100072.554.74$0
Jun 20100070.364.91$0
May 20100071.124.24$0
Apr 20100081.694.12$0
Mar 20100078.394.39$0
Feb 20100073.585.44$0
Jan 20100074.365.96$0
Dec 20090071.445.48$0
Nov 20090074.593.75$0
Oct 20090072.544.11$0
Sep 20090065.543.06$0
Aug 20090067.423.22$0
Jul 20090061.133.46$0
Jun 20090066.163.90$0
May 20090054.743.93$0
Apr 20091046.773.59$47
Mar 20090042.144.06$0
Feb 20090032.814.63$0
Jan 20090035.865.37$0
Dec 20080037.105.98$0
Nov 20080055.496.86$0
Oct 20080075.246.92$0
Sep 200800101.767.88$0
Aug 200800114.228.48$0
Jul 200800131.0811.39$0
Jun 200800131.3313.03$0
May 200800123.1711.57$0
Apr 200800110.3110.45$0
Mar 200800101.909.66$0
Feb 20080092.538.77$0
Jan 20080090.388.21$0
Dec 20070088.337.30$0
Nov 20070091.677.29$0
Oct 20070082.856.92$0
Sep 20070075.846.24$0
Aug 20070069.066.39$0
Jul 20070070.906.39$0
Jun 20070062.007.55$0
May 20070058.747.85$0
Apr 20070059.617.81$0
Mar 20070056.927.30$0
Feb 20070055.108.22$0
Jan 20070050.306.73$0
Dec 20060056.656.92$0
Nov 20060054.207.62$0
Oct 20060054.906.01$0
Sep 20060060.085.04$0
Aug 20060068.717.34$0
Jul 20060069.376.34$0
Jun 20060066.286.38$0
May 20060066.016.42$0
Apr 20060064.397.36$0
Mar 20060056.707.08$0
Feb 20060057.597.75$0
Jan 20060060.598.93$0
Dec 20050054.9413.42$0
Nov 20050054.6910.59$0
Oct 20050058.3413.80$0
Sep 20050061.4512.08$0
Aug 20050061.519.80$0
Jul 20050055.697.84$0
Jun 20050052.337.38$0
May 20050045.226.65$0
Apr 20050049.207.36$0
Mar 20050050.377.15$0
Feb 20050045.226.31$0
Jan 2005113043.166.32$4,877
Dec 20040039.866.75$0
Nov 20040045.286.33$0
Oct 20040049.706.52$0
Sep 20040043.245.28$0
Aug 20040042.375.55$0
Jul 200403138.286.08$189
Jun 200403636.106.43$232
May 200403737.486.49$240
Apr 200404134.475.86$240
Mar 20041823734.365.53$6,458
Feb 200403432.455.51$187
Jan 200404332.036.30$271
Dec 200305030.266.30$315
Nov 200305028.804.60$230
Oct 200304728.174.76$224
Sep 200303226.314.75$152
Aug 2003179029.765.13$5,327
Jul 20030029.415.17$0
Jun 20030028.565.98$0
May 20030026.595.97$0
Apr 200395026.675.41$2,534
Mar 20030031.146.10$0
Feb 20030033.487.93$0
Jan 20030030.315.58$0
Dec 2002196026.914.85$5,274
Nov 20020024.664.14$0
Oct 20020026.464.23$0
Sep 2002118027.443.64$3,238
Aug 20020025.963.16$0
Jul 20020024.583.06$0
Jun 2002174023.733.34$4,129
May 20020024.663.58$0
Apr 20020023.653.51$0
Mar 2002172022.003.10$3,784
Feb 20020018.222.38$0
Jan 20022017.172.38$34
Dec 2001170016.932.36$2,878
Nov 20012018.072.41$36
Oct 2001176019.782.53$3,481
Sep 20010024.262.25$0
Aug 20010024.873.05$0
Jul 2001182023.933.20$4,355
Jun 20010024.563.82$0
May 2001183025.524.31$4,670
Apr 20010024.685.34$0
Mar 20011024.545.38$25
Feb 2001181027.755.77$5,023
Jan 20010027.478.40$0
Dec 20000026.889.12$0
Nov 20000032.215.66$0
Oct 200075031.235.15$2,342
Sep 2000150031.875.19$4,781
Aug 20000029.644.54$0
Jul 2000141028.534.09$4,023
Jun 20000029.304.40$0
May 2000166027.263.68$4,525
Apr 20000024.513.12$0
Mar 2000182028.422.86$5,172
Feb 20000027.622.73$0
Jan 2000184025.272.48$4,650
Dec 19990024.282.42$0
Nov 19991023.192.43$23
Oct 1999161020.982.80$3,378
Sep 19990021.752.62$0
Aug 1999126019.262.88$2,427
Jul 19990017.892.37$0
Jun 1999177015.942.36$2,821
May 19990015.792.32$0
Apr 1999186015.102.21$2,809
Mar 19990012.471.84$0
Feb 199916009.981.82$1,597
Jan 19990010.381.90$0
Dec 199814309.201.77$1,316
Nov 19980010.892.19$0
Oct 1998147012.421.97$1,826
Sep 19980012.592.08$0
Aug 1998137011.301.91$1,548
Jul 1998183011.742.24$2,148
Jun 19981011.242.24$11
May 1998173012.622.21$2,183
Apr 19981013.042.51$13
Mar 1998185012.802.31$2,368
Feb 19981013.952.30$14
Jan 1998183014.702.15$2,690
Dec 19970016.322.41$0
Nov 1997177018.193.09$3,220
Oct 19970019.253.15$0
Sep 19970017.742.95$0
Aug 1997161017.862.55$2,875
Jul 1997165017.582.25$2,901
Jun 19970017.242.26$0
May 1997172018.972.31$3,263
Apr 19970017.882.08$0
Mar 1997180018.951.94$3,411
Feb 19970020.492.21$0
Jan 1997184023.483.54$4,320
Dec 19961023.32$23
Nov 1996186021.97$4,086
Oct 19960023.31$0
Sep 1996183022.22$4,066
Aug 1996172020.26$3,485
Jul 19960019.55$0
Jun 1996178018.73$3,334
May 19960019.43$0
Apr 1996100021.51$2,151
Mar 1996182019.38$3,527
Feb 19960016.98$0
Jan 1996178017.07$3,038
Dec 1995180017.19$3,094
Nov 19950016.00$0
Oct 1995196015.43$3,024
Sep 19950016.18$0
Aug 1995183015.92$2,913
Jul 19950015.24$0
Jun 1995190016.41$3,118
May 19953017.56$53
Apr 1995103017.73$1,826
Mar 1995346016.44$5,688
Feb 19955016.58$83
Jan 19950015.92$0
Dec 1994172015.03$2,585
Nov 1994127015.90$2,019
Oct 1994103015.58$1,605
Sep 199413219215.29$2,018
Aug 199433911016.13$5,468
Jul 199410530317.56$1,844
Jun 19942571,46317.09$4,392
May 199401,82815.88$0
Apr 1994193114.14$2,729
Mar 19943112.46$37
Feb 1994162112.50$2,025
Jan 199421624012.66$2,735
Dec 1993084512.33$0
Nov 199314691914.49$2,116
Oct 19932011,11815.85$3,186
Sep 199318947315.03$2,841
Aug 19932591,52015.66$4,056
Jul 19933621,60515.46$5,597
Jun 19933431,56216.79$5,759
May 19933041,71617.68$5,375
Apr 19932861,04818.05$5,162
Mar 19935021,41118.14$9,106
Feb 19931691,24017.90$3,025
Jan 19936061,40216.93$10,260

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.

Jan 2011 — as filed, then multipliedworked
Oil                    1 bbl  × $ 86.50 =        $87
Casinghead gas         0 Mcf  × $  4.59 =         $0

────────────────────────────────────────────────────
Month total                                      $87

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/10579 is the state's own key, not one this site invented.