42-461-03368
Final CompletionPEGASUS PENNSYLVANIAN UNIT
UPTON County · District 7 · COG OPERATING LLC · PEGASUS (PENNSYLVANIAN)
Permits
1
Max Depth
13,101 ft
First Permit
1997-09-10
Latest Activity
1997-09-10
Lifespan
< 1 yr
Regulatory Status
Schedule
OFF SCHEDULE
Completion
1997-09-11
Shut-In
—
Plugged
—
EWA / Production operator mismatch
Scheduling: COG OPERATING LLC ≠ Production: XTO ENERGY INC. (reported 2026-04)
EWA / Permit operator mismatch
Scheduling: COG OPERATING LLC ≠ Permit: MOBIL PRODUCING TX. & N.M. INC.
Resolved via: production → XTO ENERGY 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 (6) Elevation 2,880 ft (GR)
CSV| Formation | Top Depth (MD) | Subsea (+above / −below SL) |
|---|---|---|
| SPRABERRY | 7,625 ft | -4,745 ft |
| JO MILL | 8,444 ft | -5,564 ft |
| DEAN | 8,910 ft | -6,030 ft |
| WC LIME | 9,695 ft | -6,815 ft |
| STRAWN | 10,203 ft | -7,323 ft |
| PENN (Pennsylvanian) | 10,408 ft | -7,528 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 |
|---|---|
| 10,427–10,433 ft | Perforated |
| 10,446–10,454 ft | Perforated |
| 10,474–10,479 ft | Perforated |
Casing (3)
| Size | Set Depth | Cement |
|---|---|---|
| 13.375" | 452 ft | 400 sx |
| 9.625" | 4,662 ft | 2,800 sx |
| 7.625" | 9,290 ft | 1,008 sx |
Permit History (1)
Applications (1)
Records & Logs
4 completion filings on record · 2 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
- 2508
- Max Depth
- 13,101 ft
- Drill Type
- Vertical
- County
- UPTON
- District
- 7
- Operator
- COG OPERATING LLC
- Completed
- 1997-09-11
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