FEE

Operated by FIRST ROCK, INC. (P-5 269028) in the MARCELINA CREEK (BUDA) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 12185District 01Field 57367550Hydrogen sulphide fieldOilCasinghead gasSaveExport
Value, all time
$161 k
Jan 1993 – Jul 1997
Value, last 12 filed months
$51 k
at the published price for each month
Months reported
55
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 98 leases and 122 wells, and the rule below applies to all of them.

Discovered
1981-03-06
as the register files it
Field class
Oil
the register's own label
Between wells
1,200 ft
minimum
From a lease line
467 ft
minimum

A drilling unit in this field needs at least 80 acres.

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: OP 80 ACRES, DIAG 3250'

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
OilDisposition8,733 bbl$161,026
Casinghead gasProduction2,454 Mcf$93
Total$161,119

2,412 Mcf of this lease's gas, across 30 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 29.0143, -98.1694. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.4 miles.

29.01420, -98.16944 · 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
66.7%
2 of 3 wells
Median depth
7,793 ft
3 wells filed one
Completion to plug
34.3 years
median over 2 wells

What the state filed about each well

On the RRC proration schedule
3100.0%
A plug date is filed
266.7%
BothOn the schedule and plugged. Neither fact cancels the other.
266.7%
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 7,612 and 7,915 ft, median 7,793 ft, over the 3 wells that filed a depth.

Completions filed
Sep 1990 – Jun 1993
3 of 3 wells
Plug dates filed
Sep 2025
2 of 3 wells; 1 filed none

Last completion to plug: a median of 34.3 years across the 2 wells that filed both dates, with the middle half between 33.9 years and 34.7 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

3 wells

42-4933221237,612 ftJun 1993Yes
42-4933215127,793 ftFeb 1992Sep 2025Yes
42-4933207317,915 ftSep 1990Sep 2025Yes

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 (55)

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

55 months

Jul 19970017.582.25$0
Jun 19970017.242.26$0
May 19970018.972.31$0
Apr 19970017.882.08$0
Mar 1997200018.951.94$3,790
Feb 199704220.492.21$93
Jan 1997422023.483.54$9,909
Dec 19961715223.32$3,988
Nov 19961628121.97$3,559
Oct 199649411323.31$11,515
Sep 199666521122.22$14,776
Aug 19961728620.26$3,485
Jul 19963427419.55$6,686
Jun 19961633318.73$3,053
May 199647114419.43$9,152
Apr 19962909821.51$6,238
Mar 199650815319.38$9,845
Feb 199650918816.98$8,643
Jan 19966747417.07$11,505
Dec 1995012317.19$0
Nov 19951,01422216.00$16,224
Oct 19950015.43$0
Sep 19950016.18$0
Aug 19950015.92$0
Jul 19950015.24$0
Jun 19950016.41$0
May 19950017.56$0
Apr 19950017.73$0
Mar 19950016.44$0
Feb 19950016.58$0
Jan 19950015.92$0
Dec 19940015.03$0
Nov 19940015.90$0
Oct 19940015.58$0
Sep 19940015.29$0
Aug 19940016.13$0
Jul 19940017.56$0
Jun 19940017.09$0
May 19940015.88$0
Apr 19941623514.14$2,291
Mar 19941522312.46$1,894
Feb 199483912.50$1,038
Jan 19941615912.66$2,038
Dec 199303512.33$0
Nov 19933195314.49$4,622
Oct 199304315.85$0
Sep 19931584115.03$2,375
Aug 19931504415.66$2,349
Jul 19931614115.46$2,489
Jun 199348312116.79$8,110
May 199315712617.68$2,776
Apr 19931633218.05$2,942
Mar 19931653518.14$2,993
Feb 199303117.90$0
Jan 19931623216.93$2,743

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.

Mar 1997 — as filed, then multipliedworked
Oil                  200 bbl  × $ 18.95 =     $3,790
Casinghead gas         0 Mcf  × $  1.94 =         $0

────────────────────────────────────────────────────
Month total                                   $3,790

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/12185 is the state's own key, not one this site invented.