42-461-04285
Final CompletionPEGASUS SPRABERRY UNIT
UPTON County · District 7 · COG OPERATING LLC · PEGASUS (SPRABERRY)
Permits
2
Max Depth
12,650 ft
First Permit
1993-06-24
Latest Activity
1994-04-19
Lifespan
< 1 yr
Regulatory Status
Schedule
OFF SCHEDULE
Completion
1994-07-30
Shut-In
—
Plugged
—
EWA / Permit operator mismatch
Scheduling: COG OPERATING LLC ≠ Permit: MOBIL PRODUCING TX. & N.M. 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
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 (11) Elevation 2,875 ft (GR)
CSV| Formation | Top Depth (MD) | Subsea (+above / −below SL) |
|---|---|---|
| SPRABERRY | 7,610 ft | -4,735 ft |
| DEAN | 8,890 ft | -6,015 ft |
| WOLFCAMP | 9,140 ft | -6,265 ft |
| PENNSYLVANIAN | 10,000 ft | -7,125 ft |
| PENN. (Pennsylvanian) | 10,127 ft | -7,252 ft |
| DEVONIAN | 11,400 ft | -8,525 ft |
| DEVONIAN | 11,412 ft | -8,537 ft |
| SILURIAN (Silurian (undifferentiated)) | 12,090 ft | -9,215 ft |
| FUSSELMAN | 12,170 ft | -9,295 ft |
| MONTOYA | 12,226 ft | -9,351 ft |
| ELLENBURGER | 12,745 ft | -9,870 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 |
|---|---|
| 7,602–8,500 ft | Perforated |
| 12,738–13,056 ft | Open hole |
| ?–10,324 ft | Perforated |
Casing (4)
| Size | Set Depth | Cement |
|---|---|---|
| 13.375" | 455 ft | 400 sx |
| 9.625" | 4,922 ft | 3,800 sx |
| 7.625" | 9,225 ft | 590 sx |
| 5.5" | 12,738 ft | 825 sx |
Permit History (2)
Applications (2)
Records & Logs
7 completion filings on record · 4 with log images at RRC.
+1 more filings
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
- 1602
- Max Depth
- 12,650 ft
- Drill Type
- Vertical
- County
- UPTON
- District
- 7
- Operator
- COG OPERATING LLC
- Completed
- 1994-07-30
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