Permits
1
Max Depth
9,500 ft
First Permit
2025-07-30
Latest Activity
2025-07-30
Lifespan
< 1 yr
Regulatory Status
Schedule
OFF SCHEDULE
Completion
—
Shut-In
—
Plugged
—
Formation Tops (10) Elevation 2,879 ft (GR)
CSV| Formation | Top Depth (MD) | Subsea (+above / −below SL) |
|---|---|---|
| SANTA ROSA | 1,308 ft | +1,571 ft |
| YATES | 2,927 ft | -48 ft |
| QUEEN | 3,716 ft | -837 ft |
| GRAYBURG | 4,200 ft | -1,321 ft |
| SAN ANDRES - ACTIVE CO2 FLOOD; H (San Andres) | 4,612 ft | -1,733 ft |
| CLEARFORK (Clear Fork) | 6,840 ft | -3,961 ft |
| SPRABERRY | 8,290 ft | -5,411 ft |
| MIDDLE SPRABERRY (Spraberry) | 8,613 ft | -5,734 ft |
| DEAN | — | — |
| WOLFCAMP | — | — |
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 ↗
Offset Well Tops (nearest 8 wells with tops)
What nearby completed wells reported.
Nearest wells within 10 mi (surface locations). Click wells to select them, then open the cross-section to compare tops side by side (max 6 wells per section, including this one).
Casing (3)
| Size | Set Depth | Cement |
|---|---|---|
| 11.75" | 2,148 ft | 1,050 sx |
| 8.625" | 5,432 ft | 740 sx |
| 5.5" | 19,435 ft | 1,995 sx |
Permit History (1)
Applications (1)
Records & Logs
1 completion filing 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.
Well Details
- Well Number
- 401MH
- Max Depth
- 9,500 ft
- Drill Type
- Horizontal
- County
- MARTIN
- District
- 10
- Operator
- COG OPERATING LLC
Operator
- Name
- COG OPER LLC
- Location
- MIDLAND
- P-5 Status
- X (filed 2026-06-02)
- Cum Oil (all leases)
- 645,285,792 bbl
- Cum Gas (all leases)
- 305,183,488 mcf
- Activities
- OPRS/G, OPRS/O
- Total Permits
- 4,550