SHANNON ESTATE

Operated by ASPEN OPERATING COMPANY, L.L.C. (P-5 35430) in the OLSON field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 1138District 7CField 67284001Hydrogen sulphide fieldOilCasinghead gasSaveExport
Value, all time
$89.6 M
Jan 1993 – May 2026
Value, last 12 filed months
$10.2 M
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 13 leases and 228 wells, and the rule below applies to all of them.

Discovered
1940-05-22
as the register files it
Field class
Oil and gas
the register's own label
Between wells
0 ft
minimum
From a lease line
233 ft
minimum

A drilling unit in this field needs at least 10 acres. The field rule took effect on 2015-07-14.

The register flags this field for hydrogen sulphide. That is a poisonous gas that occurs naturally in some formations. The flag is a property of the field as the Commission records it. It is not a measurement taken at this lease, and it is not a statement that gas is escaping anywhere.

The Commission's schedule remark for this field reads: AOF-1 AND AOF-2 EFFECTIVE 04/01/2013.

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
OilDisposition1,339,606 bbl$89,555,495
Casinghead gasProduction25 Mcf$0
Total$89,555,495

25 Mcf of this lease's gas, across 25 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 (46)

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 30.8359, -101.7398. A lease has no coordinate of its own — that point is the mean of its wells, and they span 2.1 miles.

30.83985, -101.73900 · 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
28.3%
13 of 46 wells
With a plug date
28.3%
13 of 46 wells
Median depth
2,206 ft
45 wells filed one
Completion to plug
16.6 years
median over 5 wells

What the state filed about each well

On the RRC proration schedule
1328.3%
A plug date is filed
1328.3%
BothOn the schedule and plugged. Neither fact cancels the other.
1123.9%
NeitherNo plug date, and not on the schedule.
3167.4%

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, 45 of 46 wells. Median 2,206 ft, with the middle half between 2,100 and 2,550 ft; the shallowest is 1,953 ft and the deepest 7,500 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, 40 of 46 wells, Apr 1969 – May 2026. This is the LAST completion filed on each wellbore, not the first — a well recompleted in 2019 counts once, in the 2010s.

Completions filed
Apr 1969 – May 2026
40 of 46 wells; 6 filed none
Plug dates filed
Jan 1977 – Feb 2026
13 of 46 wells; 33 filed none

Last completion to plug: a median of 16.6 years across the 5 wells that filed both dates, with the middle half between 9.3 years and 23.2 years. A further 2 wells are excluded, because the last completion the Commission holds for them is dated after the plug date. Both dates are the latest of their kind on the wellbore record and they are filed separately, so the two need not run in order. The gap is the distance between two filed dates — it is not a statement of how long the well produced.

46 wells

42-10501230W 22,216 ftJan 2026Yes
42-105023040162,099 ftFeb 2026Yes
42-1050298112,089 ftJul 1998Yes
42-10503002102,106 ftSep 1997Yes
42-10503010141,953 ftJan 1977Yes
42-105035570102,050 ftSep 2025Yes
42-10540097445,947 ftMay 2026Nov 2006
42-10502282M 352,176 ftDec 2024
42-105410750332,054 ftNov 2022
42-105412710342,720 ftSep 2022
42-105022980132,142 ftSep 2022
42-10502288M 182,070 ftSep 2022
42-10532511152,890 ftSep 2022
42-10502313M121HA2,016 ftSep 2021
42-10535953M1202,053 ftApr 2019
42-105355090282,315 ftSep 2018Yes
42-105410600322,800 ftAug 2018
42-10501232W 42,120 ftNov 2016Feb 2026Yes
42-10501231W 32,100 ftNov 2016
42-105347090252,600 ftNov 2016
42-10501229W 12,047 ftOct 2016
42-10503008132,128 ftOct 2016
42-1050298932,115 ftOct 2016Oct 2024Yes
42-1050298522,206 ftOct 2016
42-10502286M 172,065 ftNov 2014
42-10541256202,900 ftJul 2011
42-105412720352,920 ftJun 2011
42-10502302O 152,249 ftOct 2010Jul 1995
42-1050299042,136 ftJun 2008
42-1050300092,115 ftMay 2008Dec 2024Yes
42-10502307M118H2,192 ftDec 2007
42-105336330246,208 ftMar 1998
42-10502082012,068 ftJun 1997Jan 2024Yes
42-1050300612Jan 1996Yes
42-1050299672,219 ftOct 1995
42-105022960122,609 ftJun 1992
42-105357040302,550 ftFeb 1992
42-10535979M216R2,285 ftSep 1991
42-10535952M212R2,300 ftJul 1991
42-105355120292,317 ftJun 1988
42-105354480262,309 ftFeb 1988
42-105354500272,314 ftJan 1988
42-10534628W 62,125 ftNov 1983
42-10532887167,500 ftJul 1980
42-105029946W2,229 ftJul 1973Sep 1996Yes
42-105023080182,564 ftApr 1969

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 202611,6690106.413.05$1,241,698
Apr 202612,961098.932.87$1,282,232
Mar 202611,789089.753.15$1,058,063
Feb 202611,329063.503.75$719,392
Jan 202613,043059.138.00$771,233
Dec 202512,258056.664.41$694,538
Nov 202510,821058.593.93$634,002
Oct 20259,712059.383.30$576,699
Sep 202512,371062.743.08$776,157
Aug 202512,578063.933.01$804,112
Jul 202511,893066.743.32$793,739
Jun 202512,736066.483.13$846,689
May 202511,668060.553.23$706,497
Apr 202512,206062.363.54$761,166
Mar 202512,338067.704.27$835,283
Feb 202510,632070.884.34$753,596
Jan 202513,423074.324.28$997,597
Dec 202413,067068.993.12$901,492
Nov 202414,162069.052.20$977,886
Oct 202412,785071.372.28$912,465
Sep 202413,312069.612.36$926,648
Aug 202414,308075.632.06$1,082,114
Jul 202413,727079.932.15$1,097,199
Jun 202412,770078.082.63$997,082
May 202413,955078.812.20$1,099,794
Apr 202413,828084.451.66$1,167,775
Mar 202414,397080.301.55$1,156,079
Feb 202415,028076.091.78$1,143,481
Jan 202414,381073.023.30$1,050,101
Dec 202312,432071.262.61$885,904
Nov 202313,638077.892.81$1,062,264
Oct 202316,284085.443.09$1,391,305
Sep 202314,999089.042.74$1,335,511
Aug 202316,191080.522.67$1,303,699
Jul 202317,094074.852.64$1,279,486
Jun 202316,505068.962.26$1,138,185
May 202318,322070.622.23$1,293,900
Apr 202316,322078.122.24$1,275,075
Mar 202313,778072.852.39$1,003,727
Feb 202315,701075.112.47$1,179,302
Jan 202311,182076.533.39$855,758
Dec 202214,475076.415.73$1,106,035
Nov 20229,796085.005.65$832,660
Oct 20227,048087.185.86$614,445
Sep 202211,031084.888.16$936,311
Aug 202213,466094.529.13$1,272,806
Jul 202213,1450101.587.54$1,335,269
Jun 202211,1700115.097.98$1,285,555
May 202210,2990109.378.43$1,126,402
Apr 20228,5860104.226.84$894,833
Mar 20229,7120108.885.08$1,057,443
Feb 202210,492091.054.86$955,297
Jan 202210,972081.844.54$897,948
Dec 202112,280071.323.90$875,810
Nov 202110,272077.435.24$795,361
Oct 202111,104079.795.71$885,988
Sep 202112,164069.865.35$849,777
Aug 20218,506066.024.22$561,566
Jul 20218,601070.783.98$608,779
Jun 20217,155069.493.38$497,201
May 20219,881063.483.02$627,246
Apr 20218,270060.362.76$499,177
Mar 202110,933061.302.72$670,193
Feb 20215,434057.805.55$314,085
Jan 202110,168050.412.81$512,569
Dec 202010,286044.642.68$459,167
Nov 20207,435038.772.71$288,255
Oct 20209,670036.972.48$357,500
Sep 20209,856037.091.99$365,559
Aug 20209,104039.982.39$363,978
Jul 20207,876038.371.83$302,202
Jun 20208,415034.901.69$293,684
May 20202,763016.921.81$46,750
Apr 20207,542014.751.80$111,245
Mar 202011,485030.341.86$348,455
Feb 202010,468049.881.98$522,144
Jan 202010,647057.252.09$609,541
Dec 201912,005059.012.30$708,415
Nov 201912,432055.302.75$687,490
Oct 201910,021053.472.42$535,823
Sep 201910,509055.052.66$578,520
Aug 201910,497053.112.30$557,496
Jul 201911,516056.272.46$648,005
Jun 201911,475052.782.49$605,651
May 201911,059058.482.74$646,730
Apr 20199,004062.632.75$563,921
Mar 201910,481056.803.06$595,321
Feb 20198,620050.852.79$438,327
Jan 20199,515046.033.23$437,975
Dec 20185,521046.594.19$257,223
Nov 20183,294052.934.24$174,351
Oct 20183,781061.443.40$232,305
Sep 20183,430059.543.11$204,222
Aug 20182,573059.403.07$152,836
Jul 20182,388065.142.93$155,554
Jun 20183,145060.183.08$189,266
May 20184,245065.382.90$277,538
Apr 20183,110063.842.90$198,542
Mar 20183,288061.222.79$201,291
Feb 20182,498061.782.77$154,326
Jan 20181,993062.874.01$125,300
Dec 20173,644057.272.92$208,692
Nov 20173,952055.423.12$219,020
Oct 20172,938049.292.98$144,814
Sep 20172,677047.523.09$127,211
Aug 20172,623045.373.00$119,006
Jul 20172,595043.873.09$113,843
Jun 20172,338042.493.09$99,342
May 20173,177045.373.26$144,140
Apr 20172,073047.933.21$99,359
Mar 20173,361046.772.98$157,194
Feb 20173,515050.452.95$177,332
Jan 20172,957049.413.42$146,105
Dec 20163,191048.763.72$155,593
Nov 20162,323042.492.64$98,704
Oct 2016449046.193.09$20,739
Sep 20162,652041.553.10$110,191
Aug 20163,119041.442.92$129,251
Jul 20163,553041.622.92$147,876
Jun 20163,788045.352.69$171,786
May 20163,546042.521.99$150,776
Apr 20163,105036.561.99$113,519
Mar 20163,532033.011.79$116,591
Feb 20163,068026.472.06$81,210
Jan 20163,799027.352.36$103,903
Dec 20153,550032.362.00$114,878
Nov 20155,265038.792.17$204,229
Oct 20156,233043.552.43$271,447
Sep 20158,447042.992.76$363,137
Aug 20159,997040.162.87$401,480
Jul 201511,138048.152.95$536,295
Jun 20159,029056.152.88$506,978
May 20159,037055.212.96$498,933
Apr 201510,031049.822.71$499,744
Mar 201511,496042.892.93$493,063
Feb 201510,305044.662.98$460,221
Jan 201514,783043.433.10$642,026
Dec 20141,258054.693.59$68,800
Nov 2014896070.464.25$63,132
Oct 2014373078.303.90$29,206
Sep 2014943086.164.05$81,249
Aug 2014273089.394.04$24,403
Jul 2014312096.564.18$30,127
Jun 2014450098.164.74$44,172
May 2014771094.734.73$73,037
Apr 2014441095.944.81$42,310
Mar 20141,782095.895.06$170,876
Feb 20141,559097.406.19$151,847
Jan 20141,413090.404.86$127,735
Dec 2013794091.824.35$72,905
Nov 20131,560088.853.74$138,606
Oct 20131,401097.423.78$136,485
Sep 20131,1890104.113.72$123,787
Aug 20137510104.253.52$78,292
Jul 20131,3980102.523.72$143,323
Jun 20131,955094.403.93$184,552
May 20131,948094.834.15$184,729
Apr 20131,606093.964.28$150,900
Mar 20131,233093.623.91$115,433
Feb 20131,073091.233.42$97,890
Jan 20133,046091.603.42$279,014
Dec 20121,801086.773.42$156,273
Nov 20121,180086.953.62$102,601
Oct 20121,799089.383.40$160,795
Sep 20122,510094.672.92$237,622
Aug 20123,569092.662.91$330,704
Jul 20122,892085.133.02$246,196
Jun 20122,852079.822.52$227,647
May 20122,511091.612.49$230,033
Apr 20122,1350101.652.00$217,023
Mar 20122,5470105.052.22$267,562
Feb 20122,8910101.102.57$292,280
Jan 20122,106098.092.73$206,578
Dec 20112,159096.873.24$209,142
Nov 2011560095.723.31$53,603
Oct 2011312084.983.65$26,514
Sep 2011916083.623.99$76,596
Aug 20111,168083.404.15$97,411
Jul 2011131094.144.52$12,332
Jun 2011392092.904.64$36,417
May 2011127098.134.40$12,463
Apr 20114770105.964.33$50,543
Mar 2011236096.364.06$22,741
Feb 2011598085.644.18$51,213
Jan 2011452086.504.59$39,098
Dec 2010517085.734.35$44,322
Nov 2010514080.843.80$41,552
Oct 2010414078.103.51$32,333
Sep 2010574072.633.98$41,690
Aug 2010318073.684.42$23,430
Jul 2010154072.554.74$11,173
Jun 2010175070.364.91$12,313
May 201095071.124.24$6,756
Apr 2010536081.694.12$43,786
Mar 2010380078.394.39$29,788
Feb 20100073.585.44$0
Jan 20100074.365.96$0
Dec 2009321071.445.48$22,932
Nov 2009665074.593.75$49,602
Oct 200950072.544.11$3,627
Sep 2009240065.543.06$15,730
Aug 20090067.423.22$0
Jul 20090061.133.46$0
Jun 20090066.163.90$0
May 2009309054.743.93$16,915
Apr 2009208046.773.59$9,728
Mar 2009582042.144.06$24,525
Feb 2009319032.814.63$10,466
Jan 2009163035.865.37$5,845
Dec 2008281037.105.98$10,425
Nov 2008327055.496.86$18,145
Oct 20081,230075.246.92$92,545
Sep 20085550101.767.88$56,477
Aug 20087720114.228.48$88,178
Jul 20084840131.0811.39$63,443
Jun 20087300131.3313.03$95,871
May 20081,1130123.1711.57$137,088
Apr 20081630110.3110.45$17,981
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 2004175042.375.55$7,415
Jul 20040038.286.08$0
Jun 2004157036.106.43$5,668
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 2003164030.266.30$4,963
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 2002153024.583.06$3,761
Jun 20020023.733.34$0
May 2002157024.663.58$3,872
Apr 2002163023.653.51$3,855
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 2001172019.782.53$3,402
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 200196024.545.38$2,356
Feb 20010027.755.77$0
Jan 2001167027.478.40$4,587
Dec 20000026.889.12$0
Nov 20000032.215.66$0
Oct 20000031.235.15$0
Sep 20000031.875.19$0
Aug 2000169029.644.54$5,009
Jul 20000028.534.09$0
Jun 2000172029.304.40$5,040
May 20000027.263.68$0
Apr 20000024.513.12$0
Mar 2000119028.422.86$3,382
Feb 20000027.622.73$0
Jan 2000143025.272.48$3,614
Dec 19990024.282.42$0
Nov 1999153023.192.43$3,548
Oct 19990020.982.80$0
Sep 19990021.752.62$0
Aug 19990019.262.88$0
Jul 1999175017.892.37$3,131
Jun 19990015.942.36$0
May 19990015.792.32$0
Apr 19990015.102.21$0
Mar 19990012.471.84$0
Feb 1999009.981.82$0
Jan 19990010.381.90$0
Dec 1998009.201.77$0
Nov 19980010.892.19$0
Oct 19980012.421.97$0
Sep 19980012.592.08$0
Aug 19980011.301.91$0
Jul 19980011.742.24$0
Jun 19980011.242.24$0
May 19980012.622.21$0
Apr 19980013.042.51$0
Mar 19980012.802.31$0
Feb 19980013.952.30$0
Jan 19980014.702.15$0
Dec 19970016.322.41$0
Nov 19970018.193.09$0
Oct 19970019.253.15$0
Sep 19970017.742.95$0
Aug 19970017.862.55$0
Jul 19970017.582.25$0
Jun 19970017.242.26$0
May 19970018.972.31$0
Apr 19970017.882.08$0
Mar 19970018.951.94$0
Feb 19970020.492.21$0
Jan 19970023.483.54$0
Dec 19960023.32$0
Nov 19960021.97$0
Oct 19960023.31$0
Sep 19960022.22$0
Aug 19960020.26$0
Jul 19960019.55$0
Jun 19960018.73$0
May 19960019.43$0
Apr 19960021.51$0
Mar 19960019.38$0
Feb 19960016.98$0
Jan 19960017.07$0
Dec 1995499017.19$8,578
Nov 19950016.00$0
Oct 19950015.43$0
Sep 19950016.18$0
Aug 19950015.92$0
Jul 19950015.24$0
Jun 1995335116.41$5,497
May 1995320117.56$5,619
Apr 1995326017.73$5,780
Mar 19950116.44$0
Feb 1995163116.58$2,703
Jan 1995465015.92$7,403
Dec 1994489015.03$7,350
Nov 1994342015.90$5,438
Oct 1994496015.58$7,728
Sep 1994648115.29$9,908
Aug 1994494116.13$7,968
Jul 1994343117.56$6,023
Jun 1994756117.09$12,920
May 1994493115.88$7,829
Apr 1994318114.14$4,497
Mar 1994357112.46$4,448
Feb 1994489112.50$6,113
Jan 1994171112.66$2,165
Dec 1993655112.33$8,076
Nov 19931,020114.49$14,780
Oct 19930115.85$0
Sep 19930115.03$0
Aug 19930115.66$0
Jul 1993456115.46$7,050
Jun 1993217116.79$3,643
May 1993696117.68$12,305
Apr 19930118.05$0
Mar 19930118.14$0
Feb 19930117.90$0
Jan 19930116.93$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 2026 — as filed, then multipliedworked
Oil               11,669 bbl  × $106.41 = $1,241,698
Casinghead gas         0 Mcf  × $  3.05 =         $0

────────────────────────────────────────────────────
Month total                               $1,241,698

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/1138 is the state's own key, not one this site invented.