42-115-33018
Final CompletionWEST WELCH UNIT
DAWSON County · District 8 · OXY USA WTP EOR LLC · WELCH
Permits
1
Max Depth
5,050 ft
First Permit
1998-02-23
Latest Activity
1998-02-23
Lifespan
< 1 yr
Regulatory Status
Schedule
OFF SCHEDULE
Completion
1998-05-17
Shut-In
—
Plugged
2025-10-17
EWA / Production operator mismatch
Scheduling: OXY USA WTP EOR LLC ≠ Production: OXY USA WTP LP (reported 2026-04)
EWA / Permit operator mismatch
Scheduling: OXY USA WTP EOR LLC ≠ Permit: OXY USA INC.
Resolved via: production → OXY USA WTP LP
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
Lease Production
Production is reported at the lease level. View production data, decline curves, and history on the lease page.
Formation Tops (3) Elevation 3,114 ft
CSV| Formation | Top Depth (MD) | Subsea (+above / −below SL) |
|---|---|---|
| RUSTLER | 2,150 ft | +964 ft |
| YATES | 3,010 ft | +104 ft |
| SAN ANDRES | 4,492 ft | -1,378 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 (1)
| Interval | Type |
|---|---|
| 4,904–4,958 ft | Perforated |
Casing (2)
| Size | Set Depth | Cement |
|---|---|---|
| 8.625" | 1,962 ft | 1,000 sx |
| 5.5" | 5,050 ft | 900 sx |
Permit History (1)
Applications (1)
Records & Logs
2 completion filings on record · 1 with log images at RRC.
Completion packets open directly (post-2011 filings include attached logs). Log images and the UL library can't be deep-linked — clicking copies the API for you to paste.
No GPS coordinates yet
Well Details
- Well Number
- 4858
- Max Depth
- 5,050 ft
- Drill Type
- Vertical
- County
- DAWSON
- District
- 8
- Operator
- OXY USA WTP EOR LLC
- Completed
- 1998-05-17
Operator
- Name
- OXY USA WTP EOR, LLC
- Location
- HOUSTON
- P-5 Status
- Active (filed 2026-01-07)
- Cum Oil (all leases)
- — bbl
- Cum Gas (all leases)
- — mcf
- Activities
- OPRS/G, OPRS/O