42-079-30778

Final Completion

MASTEN J

COCHRAN County · District 8 · UNION OIL COMPANY OF CALIFORNIA · LEVELLAND (SAN ANDRES)

RRC Lookup

Permits

Max Depth

4,945 ft

First Permit

1978-01-04

Latest Activity

1979-12-11

Lifespan

2 yrs

Regulatory Status

Schedule

OFF SCHEDULE

Completion

—

Shut-In

—

Plugged

2010-05-04

EWA / Production operator mismatch

Scheduling: UNION OIL COMPANY OF CALIFORNIA ≠ Production: TALIS ENERGY INC. (reported 2025-10)

Resolved via: production → TALIS ENERGY INC.

Production Summary

Cum Oil

— bbl

Cum Gas

— mcf

First Production

1993-01

Last Production

2026-03

Operator History

Chain of Custody

UNION OIL COMPANY OF CALIFORNIA 1993-2000→ PURE RESOURCES, L.P. 2000-2006→ CHEVRON MIDCONTINENT, L.P. 2006-2015→ STEWARD ENERGY II, LLC 2015-2020→ RMB OPERATING LLC 2020-2023→ OILWELL OPERATORS, INC. 2023-2025→ TALIS ENERGY INC. 2025-2025

Lease Production

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

Permit History (2)

#66426 Other Final Completion

MASTEN "J" · 4,945 ft

1979-12-11

Spud 1979-10-16

#2605 Drill

MASTEN "J" · 4,925 ft

1978-01-04

Permit Applications (2)

#66426 A UNION OIL COMPANY OF CALIFORNIA

received 1979-12-11

#2605 A UNION OIL COMPANY OF CALIFORNIA

received 1978-01-04

Well Details

Well Number: 5
Max Depth: 4,945 ft
Drill Type: Vertical
County: COCHRAN
District: 8
Operator: UNION OIL COMPANY OF CALIFORNIA

Operator

Name: UNION OIL CO OF CALIFORNIA
Location: MIDLAND
P-5 Status: Y (filed 2022-09-02)
Cum Oil (all leases): 78,952,713 bbl
Cum Gas (all leases): 197,557,199 mcf
Total Permits: 2,336

External Links

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