OPERATORS · TEXAS · P-5 NUMBER 100156
Castlerock EF Operating LLC
- P-5 status
- Active – Extension (X)
- P-5 last filed
- Jan 28, 2026
- Based in
- San Antonio, TX
Castlerock EF Operating LLC has filed no drilling permits in the past 12 months; its most recent permit was issued September 25, 2024.
The RRC wellbore file lists 56 wells under its operatorship (29 producing, 27 shut in).
Lease reports credit it with 627K barrels of oil and 1.01M mcf of gas in the 12 months reported through April 2026, down 44% on the year before.
34 drilling permits have been issued to this operator number since 2014; its P-5 organization report was last filed January 28, 2026.
- 0
- permits, last 12 months
- —
- vs prior 12 months (0)
- 0
- counties, 12 months
- 29
- producing wells, of 56 of record
- 17
- leases it reports
- —
- horizontal, 12 months
WINDOWS ON THE RRC ISSUE DATE · COMPUTED NOV 7, 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.
- 82%
- spud rate · 28 of 34 mature permits
- 24
- median days permit to spud · middle half 16–48
- 0
- spuds, last 180 days
- 0%
- canceled · 0 permits
- 6
- expired undrilled
- 3
- permits a year over 11 active years
Permits issued by month
LAST 60 MONTHS · BY ISSUE DATE
Last 12 months 0 · prior 12 0
Counties
Counties by permits in the last 12 months, with all-time permits and current wells of record there.
All 34 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 |
|---|---|---|
| Austin Chalk | 20 | 8 |
| Anacacho | 18 | 7 |
| Eagle Ford | 17 | 5 |
| Frio | 2 | 0 |
| Catahoula | 2 | 0 |
| Navarro | 2 | 0 |
| Olmos | 2 | 0 |
| Escondido | 2 | 0 |
| Wilcox | 2 | 0 |
| Yegua | 2 | 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 →
- 627K
- bbl oil, last 12 reported months
- -44%
- vs the 12 months before
- 1.01M
- mcf gas incl. casinghead, last 12
- 3.53M
- bbl oil since reporting began
12 months through Apr 2026 626,838 · prior 12 1,122,305(-44%)
Castlerock EF Operating LLC: Oil by month.
Beyond the permit record
RRC wellbore file
Wells of record
How it got them
Each count opens the wells it counts. Acquired means the well's permit names a different operator than the schedule does today; wells it permitted that others now run are in its permit history, marked with who runs them now. 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 | 34 |
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 |
|---|---|---|
| Eagleville (Eagle Ford-1)27135700 | 56 | 29 |
P-5 organization report
As registered with the RRC. About the P-5 →
- Registration
- Status Active – Extension (X)
- Last filed Jan 28, 2026
- Oil operator
- Address
- 111 Tower Drive Suite 300
- San Antonio, TX 78232
- (210) 688-4570
- Officers and agents
- Amend, Chapman · Member
- CE 2 III LLC · Manager
- Goudge, Elliott · Member
- Kloss, Travis · Member
Latest permits
NEWEST FIRST BY ISSUE DATE · FILED OR ON WELLS IT NOW OPERATES
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 by the operator that filed them, through the statewide reported-through month; disposal from UIC permits and H-10 reports. Oil includes condensate from gas leases and gas includes casinghead gas from oil leases, as the RRC totals them. Summary figures are rebuilt nightly. Nothing is estimated.
Developers: this page as JSON is GET /v1/data/operators/tx/100156, documented in the API reference.