42-055-32271

PRODUCING

SUN MARK EXPLORATION

CALDWELL County · District 1 · CASTILLO OIL COMPANY LLC · SALT FLAT WEST

RRC Lookup

Permits

Max Depth

3,000 ft

First Permit

1981-09-04

Latest Activity

1981-09-04

Lifespan

< 1 yr

Regulatory Status

Schedule

ON SCHEDULE

Completion

1982-01-26

Shut-In

—

Plugged

—

P-5 Org Status: Active

EWA / Permit operator mismatch

Scheduling: CASTILLO OIL COMPANY LLC ≠ Permit: BARROW, WILLIAM R. INTERESTS

Resolved via: production → CASTILLO OIL COMPANY LLC

Production Summary

Cum Oil

— bbl

Cum Gas

— mcf

First Production

1993-01

Last Production

2026-03

Operator History

Chain of Custody

POLO PETROLEUM, INC. 1993-1993→ MITCHELL PRODUCTION, INC. 1993-1997→ THOMAS OIL & GAS COMPANY 1997-2003→ LTS ENERGY, L.P. 1998-2006→ CASTILLO OIL CO. 2006-2007→ CASTILLO OIL COMPANY LLC 2007-2025

Lease Production

Production is reported at the lease level. View production data, decline curves, and history on the lease page.

Oil

production & DCA →

Permit History (1)

#132268 Drill Final Completion

SUN MARK EXPLORATION -B- · 3,000 ft

1981-09-04

Permit Applications (1)

#132268 A BARROW, WILLIAM R. INTERESTS

received 1981-09-04

Well Details

Well Number: B 1
Max Depth: 3,000 ft
Drill Type: Vertical
County: CALDWELL
District: 1
Operator: CASTILLO OIL COMPANY LLC
Completed: 1982-01-26

Operator

Name: CASTILLO OIL COMPANY LLC
Location: LULING
P-5 Status: Y (filed 2026-02-04)
Cum Oil (all leases): 166,256 bbl
Cum Gas (all leases): — mcf
Activities: OPRS/O

External Links

RRC Wellbore Query →