42-173-36373
Final CompletionCALVERLEY 4
GLASSCOCK County · District 8 · COG OPERATING LLC · SPRABERRY (TREND AREA)
Permits
1
Max Depth
12,000 ft
First Permit
2014-02-28
Latest Activity
2014-02-28
Lifespan
< 1 yr
Regulatory Status
Schedule
OFF SCHEDULE
Completion
2014-07-01
Shut-In
—
Plugged
—
EWA / Production operator mismatch
Scheduling: COG OPERATING LLC ≠ Production: DIAMONDBACK E&P LLC (reported 2026-04)
EWA / Permit operator mismatch
Scheduling: COG OPERATING LLC ≠ Permit: ADVENTURE EXPL PARTNERS II, LLC
Resolved via: production → DIAMONDBACK E&P 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
2013-08
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 (10) Elevation 2,634 ft (GL)
CSV| Formation | Top Depth (MD) | Subsea (+above / −below SL) |
|---|---|---|
| YATES | 2,157 ft | +477 ft |
| SAN ANDRES - HIGH FLOWS, H2S, CO (San Andres) | 3,699 ft | -1,065 ft |
| SPRABERRY | 6,432 ft | -3,798 ft |
| MISSISSIPPIAN | 10,850 ft | -8,216 ft |
| CLEARFORK (Clear Fork) | — | — |
| GLORIETA | — | — |
| GRAYBURG | — | — |
| QUEEN | — | — |
| SANTA ROSA | — | — |
| SEVEN RIVERS | — | — |
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 (1)
| Interval | Type |
|---|---|
| 8,516–11,154 ft | Perforated |
Casing (3)
| Size | Set Depth | Cement |
|---|---|---|
| 13.375" | 379 ft | 450 sx |
| 8.625" | 4,010 ft | 1,190 sx |
| 5.5" | 11,400 ft | 1,465 sx |
Permit History (1)
Applications (1)
Records & Logs
2 completion filings on record · 2 with log images at RRC.
Completion packets open directly (post-2011 filings include attached logs). Log images can't be deep-linked — clicking copies the API for you to paste.
No GPS coordinates yet
Well Details
- Well Number
- 2A
- Max Depth
- 12,000 ft
- Drill Type
- Vertical
- County
- GLASSCOCK
- District
- 8
- Operator
- COG OPERATING LLC
- Completed
- 2014-07-01
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
- 4,541