42-135-43408
PRODUCING HorizontalRATLIFF I UNIT
ECTOR County · District 8 · COG OPERATING LLC · SPRABERRY (TREND AREA)
Permits
1
Max Depth
17,500 ft
First Permit
2016-06-07
Latest Activity
2016-06-07
Lifespan
< 1 yr
Regulatory Status
Schedule
ON SCHEDULE
Completion
2017-05-12
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
2017-05
Last Production
2026-07
Operator History
originally filed by RELIANCE ENERGY, INC. — asset transferred
Lease Production
Production is reported at the lease level. View production data, decline curves, and history on the lease page.
Formation Tops (12) Elevation 2,952 ft (GL)
CSV| Formation | Top Depth (MD) | Subsea (+above / −below SL) |
|---|---|---|
| SANTA ROSA BASE (Santa Rosa) | 1,352 ft | +1,600 ft |
| YATES | 2,000 ft | +952 ft |
| SEVEN RIVERS | 3,970 ft | -1,018 ft |
| QUEEN | 4,309 ft | -1,357 ft |
| GRAYBURG | 4,952 ft | -2,000 ft |
| HOLT | 5,000 ft | -2,048 ft |
| SAN ANDRES - HIGH FLOWS, H2S, CO (San Andres) | 5,071 ft | -2,119 ft |
| GLORIETA | 5,580 ft | -2,628 ft |
| TUBB | 6,100 ft | -3,148 ft |
| CLEARFORK (Clear Fork) | 7,356 ft | -4,404 ft |
| CONNELL | — | — |
| ELLENBURGER | — | — |
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 |
|---|---|
| 9,355–16,380 ft | Perforated |
Casing (3)
| Size | Set Depth | Cement |
|---|---|---|
| 13.375" | 325 ft | 340 sx |
| 9.625" | 5,678 ft | 655 sx |
| 5.5" | 16,514 ft | 1,765 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 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
- 4401LS
- Max Depth
- 17,500 ft
- Drill Type
- Horizontal
- County
- ECTOR
- District
- 8
- Operator
- COG OPERATING LLC
- Completed
- 2017-05-12
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
- 4,538