OPERATORS · RRC 768894 · P-5 STATUS Y

Shamrock Oil Co

Sugar Land, TX

Shamrock Oil CO has filed no drilling permits in the past 12 months; its most recent permit was issued July 15, 1998.

The RRC wellbore file lists 2 wells under its operatorship.

59 drilling permits have been issued to this operator number since 1989; its P-5 organization report was last filed May 7, 1999.

0: permits, last 12 months
—: vs prior 12 months (0)
0: counties, 12 months
0: producing wells, of 2 of record
3: leases it reports
—: horizontal, 12 months

WINDOWS ON THE RRC ISSUE DATE · COMPUTED OCT 29, 2026

From permit to spud

FROM THE DATES ON ITS W-1 PERMITS · ALL TIME

A permit is a plan, not a well. These figures count only permits old enough to have spudded, six months and more, and read the spud, cancel, and expiry dates the RRC records on each one.

47%: spud rate · 28 of 59 mature permits
101: median days permit to spud · middle half 61–220
0: spuds, last 180 days
2%: cancelled · 1 permits
30: expired undrilled
7: permits a year over 9 active years

Where

Counties by permits in the last 12 months, with all-time permits and current wells of record there.

County	12 mo	All time	Wells	Last
Austin county →	—	57	2	Jul 15, 1998
Waller county →	—	2	0	Jun 28, 1994

All 59 permits, searchable → · Leases it reports → · On the map →

Formations in its completed wells

Tops reported on completion filings for wells it operates. RRC wellbore file. About tops →

Formation	Wells	Permitted last 3 yrs
Jackson	5	0
Miocene (undifferentiated)	3	0
Vicksburg	2	0
Oakville	1	0

Production by month

PDQ LEASE REPORTS · REPORTED THROUGH APR 2026

Barrels on leases where this operator filed the production report. Lease-level by design; the latest months are revised upward as late reports arrive. How production is reported →

0: bbl oil, last 12 reported months
—: vs the 12 months before
0: mcf gas incl. casinghead, last 12
264K: bbl oil since reporting began

No lease production reported under this operator number in the last three years.

Beyond the permit record

RRC wellbore file

Wells of record

2: on the schedule
0: producing
0: shut in
0: injection
0: temp. abandoned
1: plugged

How it got them

2: permitted itself
0: acquired from others
26: permitted, now run by others

Acquired means the well's permit names a different operator than the schedule does today. Transfers and operator numbers →

Permit types

Last 12 months against the prior 12, and all time. A type opens the permit history filtered to it. What the types mean →

Type	12 mo	Prior 12	All time
Drill	0	0	55
Reenter	0	0	2
Recompletion	0	0	2

Fields

RRC regulatory fields with the most wells of record under this operator. The field opens its page; the count opens this operator's wells in it.

Field	Wells	Producing
Raccoon Bend (Grawunder)74106240	1	0
Raccoon Bend (Oakville 970)74106680	1	0

P-5 organization report

As registered with the RRC. About the P-5 →

Registration: Status code Y; Last filed May 7, 1999

Address: 12926 Dairy Ashford Dr #150; Sugar Land, TX 77478

Officers and agents: Melton, Stephen F. · President; Melton, Laura · Secretary

Latest permits

NEWEST FIRST BY ISSUE DATE · FILED OR ON WELLS IT NOW OPERATES

Permit	Seen	Issued	Operator	County	Lease / well	Depth	API
477986	Jul 15, 1998	Jul 15, 1998	Shamrock Oil Co.	Austin	Schoeneman #2A	1,000	01530715
477985	Jul 15, 1998	Jul 15, 1998	Shamrock Oil Co.	Austin	Schoeneman #1	1,000	01530714
477313	Jun 19, 1998	Jun 19, 1998	Shamrock Oil Co.	Austin	Grawunder, Herman #9	8,000	01530713
471639	Dec 29, 1997	Dec 29, 1997	Shamrock Oil Co.	Austin	Wilson, Ollie #2A	4,200	01530706
462812	May 23, 1997	May 23, 1997	Shamrock Oil Co.	Austin	Wilson, Ollie #31	4,200	01530702
462577	May 22, 1997	May 22, 1997	Shamrock Oil Co.	Austin	Jackson #1A	4,200	01530700
462672	May 20, 1997	May 20, 1997	Shamrock Oil Co.	Austin	Schoeneman #2	1,000	01530701
457279	Mar 20, 1997	Mar 20, 1997	Shamrock Oil Co.	Austin	Wilson, Ollie #30	3,500	01530697
449620	Jul 30, 1996	Jul 30, 1996	Shamrock Oil Co.	Austin	Grawunder, Herman #10	4,500	01530695
449621	Jul 25, 1996	Jul 25, 1996	Shamrock Oil Co.	Austin	Grawunder, Herman #3	4,500	01530694
444092	Jul 12, 1996	Jul 12, 1996	Shamrock Oil Co.	Austin	Gutowsky, Joe & Walter et AL #1	4,500	01530681
445664	May 13, 1996	May 13, 1996	Shamrock Oil Co.	Austin	Grawunder, Herman #9	8,000	01530713
444520	Apr 29, 1996	Apr 29, 1996	Shamrock Oil Co.	Austin	Grawunder, Herman #7	4,300	01530685
444086	Apr 24, 1996	Apr 24, 1996	Shamrock Oil Co.	Austin	Grawunder, Henry #2	4,500	01530684
445663	Apr 8, 1996	Apr 8, 1996	Shamrock Oil Co.	Austin	Wilson, Ollie #22	4,500	01530692

Full permit history →

About this data

Registration from the RRC P-5 organization report, refreshed weekly. Permits from the OGA049M master and daily daf420 files; wells of record from the EWA wellbore schedule; production from PDQ lease reports at the last vintage; disposal from UIC permits and H-10 reports. Summary figures are rebuilt nightly.

Developers: this page as JSON is GET /v1/data/operators/tx/768894, documented in the API reference.