42-461-03327
Final CompletionPEGASUS SPRABERRY UNIT
UPTON County · District 7 · COG OPERATING LLC · PEGASUS (SPRABERRY)
Permits
3
Max Depth
13,310 ft
First Permit
1982-07-19
Latest Activity
1998-03-19
Lifespan
16 yrs
Regulatory Status
Schedule
OFF SCHEDULE
Completion
1982-07-19
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 (5) Elevation 2,830 ft (GR)
CSV| Formation | Top Depth (MD) | Subsea (+above / −below SL) |
|---|---|---|
| WOLFCAMP | 9,135 ft | -6,305 ft |
| PENN (Pennsylvanian) | 10,025 ft | -7,195 ft |
| DEVONIAN | 11,303 ft | -8,473 ft |
| FUSSELMAN | 12,080 ft | -9,250 ft |
| ELLENBURGER | 12,730 ft | -9,900 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 (4)
| Interval | Type |
|---|---|
| 7,610–8,000 ft | Perforated |
| 11,732–11,751 ft | Perforated |
| 12,728–13,310 ft | Perforated |
| 12,728–13,310 ft | Open hole |
Casing (8)
| Size | Set Depth | Cement |
|---|---|---|
| 13.375" | 460 ft | 400 sx |
| 13.375" | 460 ft | — |
| 9.625" | 5,003 ft | 4,549 sx |
| 9.625" | 5,003 ft | — |
| 2.375" | 7,550 ft | — |
| 5.5" | 8,050 ft | 480 sx |
| 7.625" | 9,225 ft | 872 sx |
| 5.5" | 12,728 ft | 600 sx |
Permit History (3)
Applications (3)
Records & Logs
5 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
- 2101
- Max Depth
- 13,310 ft
- Drill Type
- Vertical
- County
- UPTON
- District
- 7
- Operator
- COG OPERATING LLC
- Completed
- 1982-07-19
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