42-135-40621
PRODUCINGRATLIFF D
ECTOR County · District 8 · COG OPERATING LLC · SPRABERRY (TREND AREA)
Permits
1
Max Depth
13,000 ft
First Permit
2010-11-02
Latest Activity
2010-11-02
Lifespan
< 1 yr
Regulatory Status
Schedule
ON SCHEDULE
Completion
2011-03-23
Shut-In
—
Plugged
—
P-5 Org Status: X
EWA / Permit operator mismatch
Scheduling: COG OPERATING LLC ≠ Permit: RELIANCE ENERGY, INC.
Resolved via: production → COG OPERATING LLC
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
2010-08
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 (6) Elevation 3,000 ft (GR)
CSV| Formation | Top Depth (MD) | Subsea (+above / −below SL) |
|---|---|---|
| CLEARFORK (Clear Fork) | 7,360 ft | -4,360 ft |
| SPRABERRY | 8,148 ft | -5,148 ft |
| DEAN | 9,154 ft | -6,154 ft |
| WOLFCAMP | 9,178 ft | -6,178 ft |
| STRAWN | 10,329 ft | -7,329 ft |
| ATOKA | 10,650 ft | -7,650 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 |
|---|---|
| 7,540–10,296 ft | Perforated |
| 10,352–10,604 ft | Perforated |
| 10,660–11,217 ft | Perforated |
Casing (3)
| Size | Set Depth | Cement |
|---|---|---|
| 13.375" | 315 ft | 375 sx |
| 8.625" | 5,206 ft | 600 sx |
| 5.5" | 11,540 ft | 1,050 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.
No GPS coordinates yet
Well Details
- Well Number
- 4201
- Max Depth
- 13,000 ft
- Drill Type
- Vertical
- County
- ECTOR
- District
- 8
- Operator
- COG OPERATING LLC
- Completed
- 2011-03-23
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
- 4,542