42-079-30986
MASTEN A
COCHRAN County · District 8 · UNION OIL COMPANY OF CALIFORNIA · LEVELLAND (SAN ANDRES)
Permits
1
Max Depth
5,000 ft
First Permit
1978-09-08
Latest Activity
1978-09-08
Lifespan
< 1 yr
Regulatory Status
Schedule
OFF SCHEDULE
Completion
1978-12-02
Shut-In
—
Plugged
2005-08-08
EWA / Production operator mismatch
Scheduling: UNION OIL COMPANY OF CALIFORNIA ≠ Production: TALIS ENERGY INC. (reported 2026-03)
Resolved via: production → TALIS ENERGY INC.
Production Summary Production data is a work in progress — still being validated against RRC filings. Spot something off or have questions? [email protected]
Cum Oil
— bbl
Cum Gas
— mcf
First Production
1993-01
Last Production
2026-07
Injection / Disposal
Permitted Volume
385 bbl/d
Max Pressure
2,400 psi
Injection Interval
4,800–5,000 ft
Injected (12mo)
—
Operator History
Chain of Custody
Lease Production
Production is reported at the lease level. View production data, decline curves, and history on the lease page.
Formation Tops (4) Elevation 3,812 ft (GR)
CSV| Formation | Top Depth (MD) | Subsea (+above / −below SL) |
|---|---|---|
| RUSTLER ANHY (Rustler) | 2,306 ft | +1,506 ft |
| YATES | 2,818 ft | +994 ft |
| SAN ANDRES | 4,054 ft | -242 ft |
| SLAUGHTER | 4,759 ft | -947 ft |
As reported by operators on W-2/G-1 completion filings (RRC wellbore records). Depths are measured depth; names appear as filed. Subsea = reported elevation − measured depth (negative = below sea level; vertical wellbores only). View filings & logs at RRC ↗
Perforations (2)
| Interval | Type |
|---|---|
| 4,762–4,788 ft | Perforated |
| 4,883–4,924 ft | Perforated |
Casing (3)
| Size | Set Depth | Cement |
|---|---|---|
| 8.625" | 406 ft | 225 sx |
| 2.375" | 4,655 ft | — |
| 5.5" | 4,931 ft | 1,050 sx |
Permit History (1)
Applications (1)
Records & Logs
4 completion filings on record.
Completion packets open directly (post-2011 filings include attached logs). Log images can't be deep-linked — clicking copies the API for you to paste.
No GPS coordinates yet
Well Details
- Well Number
- 18
- Max Depth
- 5,000 ft
- Drill Type
- Vertical
- County
- COCHRAN
- District
- 8
- Operator
- UNION OIL COMPANY OF CALIFORNIA
- Completed
- 1978-12-02
Operator
- Location
- MIDLAND
- P-5 Status
- Inactive (filed 2020-11-18)
- Cum Oil (all leases)
- 78,952,713 bbl
- Cum Gas (all leases)
- 197,557,199 mcf
- Total Permits
- 2,336