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TILLER, D.G. -C-

Operated by SPILLER, J.A. (P-5 809855) in the SALT FLAT field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 11439District 01Field 79905001Hydrogen sulphide fieldOilCasinghead gasSaveExport
Value, all time
$228 k
Jan 1993 – Jun 1997
Value, last 12 filed months
$46 k
at the published price for each month
Months reported
54
no gaps in the span
Streams
2
oil, casinghead gas

The SALT FLAT field

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 415 leases and 1,904 wells, and the rule below applies to all of them.

Discovered
1928-05-28
as the register files it
Field class
Oil and gas
the register's own label
Between wells
300 ft
minimum
From a lease line
150 ft
minimum

A drilling unit in this field needs at least 2 acres. The field rule took effect on 1952-08-04.

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: “100 % % DELIVERABILITY SHOULD BE USED (DAMEKI NYERI).”

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
OilDisposition13,206 bbl$225,210
Casinghead gasProduction42,657 Mcf$3,145
Total$228,355

41,583 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 (26)

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 29.7131, -97.6166. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.6 miles.

29.71363, -97.61494 · 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%
26 of 26 wells
With a plug date
100.0%
26 of 26 wells
Median depth
2,676 ft
26 wells filed one
Completion to plug
31.8 years
median over 25 wells

What the state filed about each well

On the RRC proration schedule
26100.0%
A plug date is filed
26100.0%
BothOn the schedule and plugged. Neither fact cancels the other.
26100.0%
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, 26 of 26 wells. Median 2,676 ft, with the middle half between 2,665 and 2,696 ft; the shallowest is 2,640 ft and the deepest 2,767 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, 25 of 26 wells, Mar 1986 – Jul 1988. This is the LAST completion filed on each wellbore, not the first — a well recompleted in 2019 counts once, in the 2010s.

Completions filed
Mar 1986 – Jul 1988
25 of 26 wells; 1 filed none
Plug dates filed
Jun 2011 – Jan 2019
26 of 26 wells

Last completion to plug: a median of 31.8 years across the 25 wells that filed both dates, with the middle half between 31.7 years and 31.9 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

26 wells

42-055342547 E2,652 ftJul 1988Dec 2018Yes
42-0553418120 C2,702 ft1987Sep 2018Yes
42-0553418725 C2,642 ftMar 1987Jun 2011Yes
42-0553417619 C2,670 ftMar 1987Dec 2018Yes
42-0553417313 C2,698 ftMar 1987Dec 2018Yes
42-055340842 C2,720 ftMar 1987Dec 2018Yes
42-0553417914 C2,669 ftFeb 1987Oct 2018Yes
42-0553410011 C2,644 ftFeb 1987Jan 2019Yes
42-0553417815 C2,663 ftFeb 1987Nov 2018Yes
42-0553417716 C2,679 ftFeb 1987Oct 2018Yes
42-0553415140 C2,699 ftFeb 1987Dec 2018Yes
42-0553409817 C2,669 ftFeb 1987Nov 2018Yes
42-0553410110 C2,640 ftFeb 1987Nov 2018Yes
42-0553418624 C2,700 ftJan 1987Sep 2018Yes
42-055341698 C2,671 ftJan 1987Nov 2018Yes
42-055341374 C2,653 ftJan 1987Sep 2018Yes
42-055341709 C2,670 ftJan 1987Nov 2018Yes
42-055341106 C2,673 ftJan 1987Oct 2018Yes
42-0553418023 C2,693 ftJan 1987Sep 2018Yes
42-0553411321 C2,696 ftJan 1987Nov 2018Yes
42-055341365 C2,663 ftNov 1986Oct 2018Yes
42-0553411128 C2,696 ftNov 1986Nov 2018Yes
42-0553409718 C2,685 ftJul 1986Nov 2018Yes
42-055340833 C2,767 ftJul 1986Dec 2018Yes
42-0553409912 C2,696 ftJun 1986Nov 2018Yes
42-055340581 C2,695 ftMar 1986Nov 2018Yes

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 (54)

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

54 months

Jun 19970017.242.26$0
May 19970018.972.31$0
Apr 19970017.882.08$0
Mar 19970018.951.94$0
Feb 199725849220.492.21$6,372
Jan 199717558223.483.54$6,169
Dec 199625761123.32—$5,993
Nov 199617265721.97—$3,779
Oct 199625066323.31—$5,828
Sep 199624858822.22—$5,511
Aug 199617068820.26—$3,444
Jul 199643068019.55—$8,407
Jun 19968062118.73—$1,498
May 199631767919.43—$6,159
Apr 199623664121.51—$5,076
Mar 199616261719.38—$3,140
Feb 199624060316.98—$4,075
Jan 199622962717.07—$3,909
Dec 199522160017.19—$3,799
Nov 199521460416.00—$3,424
Oct 199528960515.43—$4,459
Sep 199522366716.18—$3,608
Aug 199530968915.92—$4,919
Jul 199523465615.24—$3,566
Jun 199530365616.41—$4,972
May 199523869917.56—$4,179
Apr 199532572017.73—$5,762
Mar 19952401,49816.44—$3,946
Feb 19951631,33016.58—$2,703
Jan 19953261,52815.92—$5,190
Dec 19942461,56715.03—$3,697
Nov 19942371,61115.90—$3,768
Oct 19942281,36115.58—$3,552
Sep 19943071,59615.29—$4,694
Aug 19942351,13716.13—$3,791
Jul 199432637817.56—$5,725
Jun 199424850617.09—$4,238
May 199431340315.88—$4,970
Apr 19942891,50814.14—$4,086
Mar 199430378412.46—$3,775
Feb 199414163312.50—$1,763
Jan 199434770512.66—$4,393
Dec 199327559712.33—$3,391
Nov 199319862514.49—$2,869
Oct 199334068115.85—$5,389
Sep 199326266815.03—$3,938
Aug 19933421,05815.66—$5,356
Jul 19932721,11615.46—$4,205
Jun 19934291,14416.79—$7,203
May 19932981,10017.68—$5,269
Apr 19932991,10318.05—$5,397
Mar 19932951,16118.14—$5,351
Feb 19933661,03317.90—$6,551
Jan 19933011,18116.93—$5,096

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.

Feb 1997 — as filed, then multipliedworked
Oil                  258 bbl  × $ 20.49 =     $5,286
Casinghead gas       492 Mcf  × $  2.21 =     $1,085

────────────────────────────────────────────────────
Month total                                   $6,372

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. 01/O/11439 is the state's own key, not one this site invented.