42-165-32847
PRODUCINGWASSON SOUTH CLEARFORK UNIT
GAINES County · District 8 · OCCIDENTAL PERMIAN LTD. · WASSON 72
Permits
1
Max Depth
7,800 ft
First Permit
1984-05-23
Latest Activity
1984-05-23
Lifespan
< 1 yr
Regulatory Status
Schedule
ON SCHEDULE
Completion
1991-06-07
Shut-In
—
Plugged
—
P-5 Org Status: Active
EWA / Permit operator mismatch
Scheduling: OCCIDENTAL PERMIAN LTD. ≠ Permit: SHELL WESTERN E&P INC.
Resolved via: production → OCCIDENTAL PERMIAN LTD.
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
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 (15) Elevation 3,538 ft (GR)
CSV| Formation | Top Depth (MD) | Subsea (+above / −below SL) |
|---|---|---|
| RUSTLER | 2,023 ft | +1,515 ft |
| SALADO | 2,192 ft | +1,346 ft |
| TANSIL | 2,774 ft | +764 ft |
| YATES | 2,850 ft | +688 ft |
| SEVEN RIVERS | 2,994 ft | +544 ft |
| QUEEN | 3,325 ft | +213 ft |
| GRAYBURG | 3,995 ft | -457 ft |
| SAN ANDRES | 4,248 ft | -710 ft |
| GLORIETA | 5,663 ft | -2,125 ft |
| U. CLEARFORK | 5,902 ft | -2,364 ft |
| UPPER CLEARFORK (Clear Fork) | 5,902 ft | -2,364 ft |
| TUBB | 6,930 ft | -3,392 ft |
| L. CLEARFORK | 7,015 ft | -3,477 ft |
| LOWER CLEARFORK (Clear Fork) | 7,015 ft | -3,477 ft |
| WICHITA (Wichita-Albany) | 7,442 ft | -3,904 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 |
|---|---|
| 5,909–7,437 ft | Perforated |
| 7,060–7,080 ft | Perforated |
Casing (3)
| Size | Set Depth | Cement |
|---|---|---|
| 13.375" | 400 ft | 400 sx |
| 9.625" | 3,328 ft | 1,250 sx |
| 5.5" | 7,521 ft | 2,220 sx |
Permit History (1)
Applications (2)
Records & Logs
2 completion filings on record.
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
- 8521S
- Max Depth
- 7,800 ft
- Drill Type
- Vertical
- County
- GAINES
- District
- 8
- Operator
- OCCIDENTAL PERMIAN LTD.
- Completed
- 1991-06-07
Operator
- Location
- HOUSTON
- P-5 Status
- Active (filed 2026-02-02)
- Cum Oil (all leases)
- 1,136,409,534 bbl
- Cum Gas (all leases)
- 442,977,611 mcf
- Activities
- CSGD/G, CSGD/P, G/PUR, GTHS/C, GTHS/G, GTHS/O, OPRS/G, OPRS/O
- Total Permits
- 6,246