OCONNOR, MARY ELLEN

Operated by DOLPHIN PETROLEUM, LP (P-5 222226) in the MARY ELLEN OCONNOR (FQ- 9) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 3126District 02Field 57911130NGPA filingOilCasinghead gasSaveExport
Value, all time
$393 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 6 leases and 29 wells, and the rule below applies to all of them.

Discovered
1953-10-10
as the register files it
Field class
Oil and gas
the register's own label
Between wells
660 ft
minimum
From a lease line
330 ft
minimum

A drilling unit in this field needs at least 20 acres.

The Commission's schedule remark for this field reads: RESCINDED CASING & MULTI-STAGE CEMENTING RULES 1-13-86.

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
NGPA3none

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
OilDisposition19,135 bbl$324,552
Casinghead gasProduction45,188 Mcf$68,830
Total$393,382

20,449 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 (10)

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 28.2594, -97.2257. A lease has no coordinate of its own — that point is the mean of its wells, and they span 1.6 miles.

28.25924, -97.22566 · 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%
10 of 10 wells
With a plug date
100.0%
10 of 10 wells
Median depth
6,000 ft
10 wells filed one
Completion to plug
29.8 years
median over 9 wells

What the state filed about each well

On the RRC proration schedule
10100.0%
A plug date is filed
10100.0%
BothOn the schedule and plugged. Neither fact cancels the other.
10100.0%
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

Total depth in feet, 10 of 10 wells. Median 6,000 ft, with the middle half between 5,957 and 6,400 ft; the shallowest is 5,950 ft and the deepest 9,500 ft. The median is published rather than the mean, because a single mis-keyed depth moves a mean and cannot move a median.

When they were last completed

Last completion by decade, 9 of 10 wells, May 1970 – Oct 1992. This is the LAST completion filed on each wellbore, not the first — a well recompleted in 2019 counts once, in the 2010s.

Completions filed
May 1970 – Oct 1992
9 of 10 wells; 1 filed none
Plug dates filed
Feb 2005 – Oct 2022
10 of 10 wells

Last completion to plug: a median of 29.8 years across the 9 wells that filed both dates, with the middle half between 29.0 years and 35.0 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

10 wells

42-3910187320 L6,000 ftJun 2022Yes
42-39101867146,000 ftOct 1992Oct 2021Yes
42-39130597476,408 ftJul 1992Apr 2022Yes
42-39130568386,400 ftJul 1992Nov 2021Yes
42-3910402726 D5,950 ftSep 1988Sep 2022Yes
42-3913000830 L5,950 ftJul 1987Feb 2005Yes
42-39130585446,400 ftApr 1987Apr 2022Yes
42-39131249529,500 ftDec 1986Apr 2022Yes
42-3913007633 L5,953 ftFeb 1984Oct 2005Yes
42-3913008134 L5,970 ftMay 1970Oct 2022Yes

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 201609641.622.92$281
Jun 201610045.352.69$454
May 20160042.521.99$0
Apr 20160036.561.99$0
Mar 20160033.011.79$0
Feb 201608826.472.06$182
Jan 201608027.352.36$189
Dec 201515032.362.00$485
Nov 2015149938.792.17$758
Oct 2015018843.552.43$456
Sep 201514042.992.76$602
Aug 20151416240.162.87$1,028
Jul 201509948.152.95$292
Jun 20152127456.152.88$1,969
May 20151419155.212.96$1,337
Apr 2015014149.822.71$382
Mar 2015256642.892.93$1,266
Feb 201508644.662.98$256
Jan 201507843.433.10$242
Dec 201407654.693.59$273
Nov 201408170.464.25$344
Oct 201408278.303.90$320
Sep 201405686.164.05$227
Aug 201405889.394.04$234
Jul 201409196.564.18$380
Jun 2014010198.164.74$478
May 201409094.734.73$425
Apr 201409995.944.81$476
Mar 2014010095.895.06$506
Feb 2014010097.406.19$619
Jan 2014011490.404.86$554
Dec 20130091.824.35$0
Nov 20130088.853.74$0
Oct 2013010197.423.78$382
Sep 2013099104.113.72$368
Aug 20130100104.253.52$352
Jul 20130101102.523.72$375
Jun 20130094.403.93$0
May 20130094.834.15$0
Apr 201309993.964.28$424
Mar 201309993.623.91$387
Feb 201308191.233.42$277
Jan 2013010491.603.42$356
Dec 2012010386.773.42$352
Nov 2012010186.953.62$366
Oct 201209989.383.40$337
Sep 2012010094.672.92$292
Aug 2012011092.662.91$320
Jul 2012011185.133.02$335
Jun 2012010179.822.52$254
May 2012010191.612.49$251
Apr 20120114101.652.00$228
Mar 20120112105.052.22$249
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 20110086.504.59$0
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 20090046.773.59$0
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 20050043.166.32$0
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 20040038.286.08$0
Jun 20040036.106.43$0
May 20040037.486.49$0
Apr 20040034.475.86$0
Mar 20040034.365.53$0
Feb 20040032.455.51$0
Jan 20040032.036.30$0
Dec 20030030.266.30$0
Nov 20030028.804.60$0
Oct 20030028.174.76$0
Sep 20030026.314.75$0
Aug 20030029.765.13$0
Jul 20030029.415.17$0
Jun 20030028.565.98$0
May 20030026.595.97$0
Apr 20030026.675.41$0
Mar 20030031.146.10$0
Feb 20030033.487.93$0
Jan 20030030.315.58$0
Dec 20020026.914.85$0
Nov 20020024.664.14$0
Oct 20020026.464.23$0
Sep 20020027.443.64$0
Aug 20020025.963.16$0
Jul 20020024.583.06$0
Jun 20020023.733.34$0
May 20020024.663.58$0
Apr 20020023.653.51$0
Mar 20020022.003.10$0
Feb 20020018.222.38$0
Jan 20020017.172.38$0
Dec 20010016.932.36$0
Nov 20010018.072.41$0
Oct 20010019.782.53$0
Sep 20010024.262.25$0
Aug 20010024.873.05$0
Jul 20010023.933.20$0
Jun 20010024.563.82$0
May 20010025.524.31$0
Apr 20010024.685.34$0
Mar 20010024.545.38$0
Feb 20010027.755.77$0
Jan 20010027.478.40$0
Dec 200011026.889.12$296
Nov 20003029432.215.66$2,630
Oct 20003632531.235.15$2,797
Sep 20003134131.875.19$2,757
Aug 20003735829.644.54$2,722
Jul 20002435728.534.09$2,145
Jun 2000730129.304.40$1,529
May 20000027.263.68$0
Apr 20000024.513.12$0
Mar 20004028.422.86$114
Feb 20002029027.622.73$1,343
Jan 20002132225.272.48$1,329
Dec 19990024.282.42$0
Nov 199915023.192.43$348
Oct 19995229020.982.80$1,904
Sep 19999624121.752.62$2,719
Aug 199913747919.262.88$4,016
Jul 199912344917.892.37$3,266
Jun 199914538215.942.36$3,214
May 199922844015.792.32$4,621
Apr 199915735715.102.21$3,159
Mar 19991255412.471.84$1,658
Feb 1999126589.981.82$1,363
Jan 19990010.381.90$0
Dec 1998009.201.77$0
Nov 19980010.892.19$0
Oct 199823656312.421.97$4,040
Sep 199824155412.592.08$4,188
Aug 199822757811.301.91$3,668
Jul 199825561511.742.24$4,370
Jun 199818261711.242.24$3,426
May 199824467412.622.21$4,566
Apr 199823065113.042.51$4,630
Mar 199825274012.802.31$4,935
Feb 199821560313.952.30$4,386
Jan 199824361114.702.15$4,889
Dec 199724171916.322.41$5,667
Nov 199724168718.193.09$6,505
Oct 199723262419.253.15$6,431
Sep 199723361917.742.95$5,962
Aug 199724580517.862.55$6,432
Jul 199723265717.582.25$5,555
Jun 199722769817.242.26$5,489
May 199724487518.972.31$6,649
Apr 199723276617.882.08$5,744
Mar 199726878818.951.94$6,607
Feb 199722069220.492.21$6,034
Jan 199723573323.483.54$8,112
Dec 199623176423.32$5,387
Nov 199623375521.97$5,119
Oct 199626982423.31$6,270
Sep 199625678722.22$5,688
Aug 199627989420.26$5,653
Jul 199623638119.55$4,614
Jun 199622940418.73$4,289
May 199622841219.43$4,430
Apr 199623356221.51$5,012
Mar 199625354619.38$4,903
Feb 199623552916.98$3,990
Jan 199625358317.07$4,319
Dec 199524647517.19$4,229
Nov 199523444216.00$3,744
Oct 199525344715.43$3,904
Sep 199527643216.18$4,466
Aug 199525042515.92$3,980
Jul 199530942815.24$4,709
Jun 199527641716.41$4,529
May 199529242017.56$5,128
Apr 199530940617.73$5,479
Mar 199529144916.44$4,784
Feb 199525040416.58$4,145
Jan 199525256915.92$4,012
Dec 199424228715.03$3,637
Nov 199425827515.90$4,102
Oct 199430128915.58$4,690
Sep 199423927315.29$3,654
Aug 199420731016.13$3,339
Jul 199422830417.56$4,004
Jun 199427028317.09$4,614
May 199428345315.88$4,494
Apr 199427136214.14$3,832
Mar 199420825512.46$2,592
Feb 199426322912.50$3,288
Jan 199424238812.66$3,064
Dec 199325939112.33$3,193
Nov 199325835914.49$3,738
Oct 199327537115.85$4,359
Sep 199328635715.03$4,299
Aug 199327436415.66$4,291
Jul 199328637115.46$4,422
Jun 199327637616.79$4,634
May 199327937017.68$4,933
Apr 199324825418.05$4,476
Mar 199327726618.14$5,025
Feb 199324723017.90$4,421
Jan 199325827716.93$4,368

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.

Jul 2016 — as filed, then multipliedworked
Oil                    0 bbl  × $ 41.62 =         $0
Casinghead gas        96 Mcf  × $  2.92 =       $281

────────────────────────────────────────────────────
Month total                                     $281

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. 02/O/3126 is the state's own key, not one this site invented.