TUNSTILL UNIT

Operated by MADISON AND WRIGHT LLC (P-5 521182) in the TUNSTILL, EAST (DELAWARE) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 36550District 08Field 91818500OilCasinghead gasSaveExport
Value, all time
$10.2 M
Feb 2001 – May 2026
Value, last 12 filed months
$0
at the published price for each month
Months reported
304
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 26 leases and 100 wells, and the rule below applies to all of them.

Discovered
1959-08-23
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
330 ft
minimum

A drilling unit in this field needs at least 40 acres.

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
OilDisposition185,028 bbl$9,657,501
Casinghead gasProduction104,980 Mcf$571,537
Total$10,229,038

Wells on this lease (36)

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 31.8364, -103.7859. A lease has no coordinate of its own — that point is the mean of its wells, and they span 2.1 miles.

31.83628, -103.78652 · 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
97.2%
35 of 36 wells
With a plug date
94.4%
34 of 36 wells
Median depth
3,750 ft
34 wells filed one
Completion to plug
14.1 years
median over 11 wells

What the state filed about each well

On the RRC proration schedule
3597.2%
A plug date is filed
3494.4%
BothOn the schedule and plugged. Neither fact cancels the other.
3494.4%
NeitherNo plug date, and not on the schedule.
12.8%

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, 34 of 36 wells. Median 3,750 ft, with the middle half between 3,700 and 3,795 ft; the shallowest is 3,540 ft and the deepest 18,500 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, 12 of 36 wells, Sep 1965 – Feb 2012. This is the LAST completion filed on each wellbore, not the first — a well recompleted in 2019 counts once, in the 2010s.

Completions filed
Sep 1965 – Feb 2012
12 of 36 wells; 24 filed none
Plug dates filed
Jun 2002 – Mar 2026
34 of 36 wells; 2 filed none

Last completion to plug: a median of 14.1 years across the 11 wells that filed both dates, with the middle half between 13.8 years and 27.3 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

36 wells

42-3010008417063,677 ftJan 2025Yes
42-3010008517093,665 ftAug 2022Yes
42-3010008717023,720 ftMay 2023Yes
42-3010009417073,700 ftMay 2022Yes
42-3010040617103,779 ftAug 2004Yes
42-3010041419013,678 ftJul 2021Yes
42-301004151902W3,706 ftJun 2002Yes
42-3010044320013,690 ftFeb 2026Yes
42-3010044520033,750 ftSep 2004Yes
42-3010049917013,744 ftSep 2004Yes
42-3010050017033,712 ftMay 2021Yes
42-3010050217043,731 ftOct 2024Yes
42-301006051801May 2021Yes
42-3010104917083,755 ftAug 2008Yes
42-301100161705W3,750 ftJan 2015Yes
42-3011012320063,764 ftAug 2008Yes
42-3011012420073,749 ftNov 2010Yes
42-3011012520083,780 ftAug 2008Yes
42-3011012620093,710 ftAug 2008Yes
42-3011012720103,800 ftMar 2026Yes
42-3011018129013,700 ftNov 2010Yes
42-3011018519033,645 ftAug 2008Yes
42-3011018820043,775 ftJul 2011Yes
42-301101933002
42-3011018729023,620 ftFeb 2012Mar 2026Yes
42-3011019230013,540 ftFeb 2012Mar 2026Yes
42-3013005620113,780 ftFeb 2012Mar 2026Yes
42-301311062013W3,830 ftNov 1998Feb 2026Yes
42-301311012012W3,828 ftNov 1998Jun 2012Yes
42-301311082005W3,810 ftNov 1998Feb 2026Yes
42-301311072014W3,825 ftNov 1998Jan 2010Yes
42-3013110320023,800 ftNov 1998Oct 2024Yes
42-301311052015W3,810 ftNov 1998Jul 2011Yes
42-30130196180318,500 ftJul 1982Sep 2020Yes
42-3013021118024,995 ftMay 1982Nov 2011Yes
42-3011018619043,600 ftSep 1965Yes

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 (304)

Volume × price = value, one row per cycle. The price columns are the same series published on the prices page — nothing here is modelled.

304 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 2019162052.782.49$8,550
May 20190058.482.74$0
Apr 20190062.632.75$0
Mar 2019171056.803.06$9,713
Feb 20190050.852.79$0
Jan 20190046.033.23$0
Dec 20180046.594.19$0
Nov 20180052.934.24$0
Oct 2018170061.443.40$10,445
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 2018172061.782.77$10,626
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 2017150042.493.09$6,374
May 2017341045.373.26$15,471
Apr 20170047.933.21$0
Mar 20170046.772.98$0
Feb 2017169050.452.95$8,526
Jan 20170049.413.42$0
Dec 2016168048.763.72$8,192
Nov 2016505042.492.64$21,457
Oct 20160046.193.09$0
Sep 20160041.553.10$0
Aug 20160041.442.92$0
Jul 2016167041.622.92$6,951
Jun 2016665045.352.69$30,158
May 2016672042.521.99$28,573
Apr 2016672036.561.99$24,568
Mar 2016511033.011.79$16,868
Feb 20160026.472.06$0
Jan 2016170027.352.36$4,650
Dec 2015506032.362.00$16,374
Nov 20150038.792.17$0
Oct 20151,011043.552.43$44,029
Sep 2015674042.992.76$28,975
Aug 2015675040.162.87$27,108
Jul 2015838048.152.95$40,350
Jun 2015833056.152.88$46,773
May 2015847055.212.96$46,763
Apr 2015842049.822.71$41,948
Mar 20150042.892.93$0
Feb 2015684044.662.98$30,547
Jan 2015863043.433.10$37,480
Dec 2014691054.693.59$37,791
Nov 2014865070.464.25$60,948
Oct 2014668078.303.90$52,304
Sep 2014319086.164.05$27,485
Aug 2014503089.394.04$44,963
Jul 2014169096.564.18$16,319
Jun 2014339098.164.74$33,276
May 2014506094.734.73$47,933
Apr 2014338095.944.81$32,428
Mar 2014514095.895.06$49,287
Feb 2014338097.406.19$32,921
Jan 2014499090.404.86$45,110
Dec 2013697091.824.35$63,999
Nov 2013355088.853.74$31,542
Oct 2013515097.423.78$50,171
Sep 20135140104.113.72$53,513
Aug 20135230104.253.52$54,523
Jul 20133650102.523.72$37,420
Jun 2013705094.403.93$66,552
May 2013534094.834.15$50,639
Apr 2013516093.964.28$48,483
Mar 2013550093.623.91$51,491
Feb 2013353091.233.42$32,204
Jan 2013527091.603.42$48,273
Dec 2012346086.773.42$30,022
Nov 2012337086.953.62$29,302
Oct 2012339089.383.40$30,300
Sep 2012331094.672.92$31,336
Aug 2012181092.662.91$16,771
Jul 2012500085.133.02$42,565
Jun 20120079.822.52$0
May 2012343091.612.49$31,422
Apr 20121780101.652.00$18,094
Mar 20123650105.052.22$38,343
Feb 20123330101.102.57$33,666
Jan 2012343098.092.73$33,645
Dec 2011347096.873.24$33,614
Nov 2011354095.723.31$33,885
Oct 2011351084.983.65$29,828
Sep 2011174083.623.99$14,550
Aug 2011158083.404.15$13,177
Jul 2011330094.144.52$31,066
Jun 2011167092.904.64$15,514
May 2011341098.134.40$33,462
Apr 20111710105.964.33$18,119
Mar 2011170096.364.06$16,381
Feb 20110085.644.18$0
Jan 2011349086.504.59$30,189
Dec 2010334085.734.35$28,634
Nov 2010670080.843.80$54,163
Oct 2010712078.103.51$55,607
Sep 2010847072.633.98$61,518
Aug 2010705073.684.42$51,944
Jul 20108418672.554.74$61,422
Jun 201084511170.364.91$59,999
May 20105029571.124.24$36,105
Apr 201086210181.694.12$70,833
Mar 201083810078.394.39$66,130
Feb 20103594073.585.44$26,633
Jan 20101,0207774.365.96$76,306
Dec 20091,0138371.445.48$72,824
Nov 20091,02111274.593.75$76,577
Oct 200983111172.544.11$60,737
Sep 20091,0044065.543.06$65,925
Aug 20096724067.423.22$45,435
Jul 20099806461.133.46$60,129
Jun 20096469366.163.90$43,102
May 20096547654.743.93$36,098
Apr 20091,0018646.773.59$47,125
Mar 200981313342.144.06$34,800
Feb 20091,3328532.814.63$44,097
Jan 20091,17113335.865.37$42,706
Dec 20081,16318837.105.98$44,271
Nov 20081,00419355.496.86$57,036
Oct 200899320775.246.92$76,146
Sep 20081,29184101.767.88$132,034
Aug 2008996159114.228.48$115,112
Jul 20081,151282131.0811.39$154,085
Jun 20081,149301131.3313.03$154,821
May 20081,293301123.1711.57$162,743
Apr 20081,143217110.3110.45$128,353
Mar 20081,472236101.909.66$152,278
Feb 20081,00819392.538.77$94,963
Jan 20081,16614090.388.21$106,532
Dec 20071,3381,54888.337.30$129,489
Nov 20071,0191,28391.677.29$102,767
Oct 20071,18421182.856.92$99,555
Sep 200782611875.846.24$63,381
Aug 20077329469.066.39$51,152
Jul 20071,13917770.906.39$81,886
Jun 20071,12919862.007.55$71,493
May 200775133258.747.85$46,719
Apr 20071,09333259.617.81$67,745
Mar 20071,269056.927.30$72,231
Feb 20071,20032155.108.22$68,757
Jan 20071,15539650.306.73$60,760
Dec 20061,31051956.656.92$77,802
Nov 200697531354.207.62$55,229
Oct 20061,36336554.906.01$77,024
Sep 200672127160.085.04$44,683
Aug 20061,46832068.717.34$103,215
Jul 20061,09335969.376.34$78,098
Jun 200684924966.286.38$57,861
May 20061,73830266.016.42$116,666
Apr 200690941064.397.36$61,548
Mar 200656540756.707.08$34,918
Feb 20061,76581357.597.75$107,948
Jan 20061,8961,02560.598.93$124,035
Dec 20051,17088454.9413.42$76,139
Nov 200553632954.6910.59$32,797
Oct 20051,48155858.3413.80$94,100
Sep 20051,28077461.4512.08$88,005
Aug 20051,30165661.519.80$86,451
Jul 20051,6161,09255.697.84$98,560
Jun 20051,20273452.337.38$68,318
May 20051,06253345.226.65$51,569
Apr 200596864749.207.36$52,388
Mar 20051,90178450.377.15$101,363
Feb 20051,07868245.226.31$53,052
Jan 20051,12462643.166.32$52,470
Dec 20041,37490639.866.75$60,884
Nov 20042,3131,33645.286.33$113,190
Oct 20048441,62749.706.52$52,547
Sep 20042,1481,66143.245.28$101,656
Aug 20047161,78642.375.55$40,250
Jul 20041,3971,95938.286.08$65,396
Jun 20041,5712,16836.106.43$70,660
May 20041,6562,04437.486.49$75,342
Apr 20041,5401,71334.475.86$63,119
Mar 20041,9631,92434.365.53$78,089
Feb 20041,3771,53832.455.51$53,157
Jan 20041,8241,80832.036.30$69,812
Dec 20031,8991,82730.266.30$68,977
Nov 20031,6912,06328.804.60$58,181
Oct 20031,3641,69328.174.76$46,482
Sep 20031,1091,21426.314.75$34,944
Aug 20031,0881,48429.765.13$39,991
Jul 20031,3411,96729.415.17$49,610
Jun 20031,6761,80728.565.98$58,678
May 20031,1611,93326.595.97$42,416
Apr 20031,5342,23926.675.41$53,019
Mar 20031,7282,15531.146.10$66,947
Feb 20031,7291,54333.487.93$70,117
Jan 20031,9191,55930.315.58$66,867
Dec 20021,8701,30126.914.85$56,636
Nov 20021,39688224.664.14$38,074
Oct 20021,9471,29426.464.23$56,990
Sep 20021,6301,61227.443.64$50,587
Aug 20021,5582,08725.963.16$47,049
Jul 20021,7152,41224.583.06$49,540
Jun 20021,1352,57323.733.34$35,523
May 20021,9252,27924.663.58$55,638
Apr 20022,1151,92223.653.51$56,770
Mar 20021,5791,31522.003.10$38,818
Feb 20021,7561,06418.222.38$34,522
Jan 20022,1211,47017.172.38$39,910
Dec 20011,9771,06816.932.36$35,996
Nov 20011,7561,38018.072.41$35,051
Oct 20011,9351,62219.782.53$42,376
Sep 20012,0001,77524.262.25$52,516
Aug 20011,5472,00424.873.05$44,592
Jul 20011,1481,84623.933.20$33,373
Jun 20012,1602,22524.563.82$61,558
May 20012,4272,07725.524.31$70,883
Apr 20011,1052,60024.685.34$41,143
Mar 20012,0141,74824.545.38$58,822
Feb 20012,4931,64127.755.77$78,645

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.

Jun 2019 — as filed, then multipliedworked
Oil                  162 bbl  × $ 52.78 =     $8,550
Casinghead gas         0 Mcf  × $  2.49 =         $0

────────────────────────────────────────────────────
Month total                                   $8,550

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. 08/O/36550 is the state's own key, not one this site invented.