Permits
1
Max Depth
8,500 ft
First Permit
1984-10-18
Latest Activity
1984-10-18
Lifespan
< 1 yr
Regulatory Status
Schedule
OFF SCHEDULE
Completion
1985-02-03
Shut-In
—
Plugged
—
EWA / Production operator mismatch
Scheduling: COX JOHN L. ≠ Production: PIONEER NATURAL RES. USA, INC. (reported 2026-03)
Resolved via: production → PIONEER NATURAL RES. USA, 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
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 2,671 ft (GR)
CSV| Formation | Top Depth (MD) | Subsea (+above / −below SL) |
|---|---|---|
| CRATACEOUS | 450 ft | +2,221 ft |
| UPPER SPRABERRY (Spraberry) | 6,710 ft | -4,039 ft |
| LOWER SPRABERRY (Spraberry) | 7,560 ft | -4,889 ft |
| DEAN | 7,850 ft | -5,179 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 (3)
| Interval | Type |
|---|---|
| 6,714–7,116 ft | Perforated |
| 7,565–7,711 ft | Perforated |
| 7,856–8,214 ft | Perforated |
Casing (2)
| Size | Set Depth | Cement |
|---|---|---|
| 8.625" | 851 ft | 600 sx |
| 4.5" | 8,250 ft | 1,400 sx |
Permit History (1)
Applications (1)
Records & Logs
3 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
- 4
- Max Depth
- 8,500 ft
- Drill Type
- Vertical
- County
- REAGAN
- District
- 7
- Operator
- COX JOHN L.
- Completed
- 1985-02-03
Operator
- Name
- COX, JOHN L
- Location
- MIDLAND
- P-5 Status
- Inactive (filed 2003-03-21)
- Cum Oil (all leases)
- 15,795,687 bbl
- Cum Gas (all leases)
- 2,577,420 mcf
- Total Permits
- 1,123