42-241-30653
PRODUCING HorizontalELLIS UNIT A-521
JASPER County · District 6 · DELFIN OPERATING LLC · BROOKELAND (AUSTIN CHALK 8800)
Permits
3
Max Depth
18,500 ft
First Permit
1998-06-29
Latest Activity
1998-06-29
Lifespan
< 1 yr
Regulatory Status
Schedule
ON SCHEDULE
Completion
1999-01-11
Shut-In
—
Plugged
—
P-5 Org Status: X
EWA / Permit operator mismatch
Scheduling: DELFIN OPERATING LLC ≠ Permit: UNION PACIFIC RESOURCES COMPANY
Resolved via: scheduling → DELFIN 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
1999-01
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 117 ft (KB)
CSV| Formation | Top Depth (MD) | Subsea (+above / −below SL) |
|---|---|---|
| WILCOX SANDS (Wilcox) | 7,700 ft | -7,583 ft |
| MIDWAY SHALE (Midway) | 9,050 ft | -8,933 ft |
| NAVARRO SANDS (Navarro) | 10,307 ft | -10,190 ft |
| TAYLOR SHALE (Taylor) | 11,027 ft | -10,910 ft |
| AUSTIN CHALK | 11,418 ft | -11,301 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 (2)
| Interval | Type |
|---|---|
| 11,430–15,978 ft | Perforated |
| 11,590–15,751 ft | Perforated |
Casing (2)
| Size | Set Depth | Cement |
|---|---|---|
| 10.75" | 2,010 ft | 955 sx |
| 7.625" | 11,482 ft | 820 sx |
Permit History (3)
Applications (3)
Records & Logs
2 completion filings on record · 1 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
- 1
- Max Depth
- 18,500 ft
- Drill Type
- Horizontal
- County
- JASPER
- District
- 6
- Operator
- DELFIN OPERATING LLC
- Completed
- 1999-01-11
Operator
- Name
- DELFIN OPER, LLC
- Location
- DALLAS
- P-5 Status
- Delinquent (filed 2025-06-03)
- Cum Oil (all leases)
- 242,490 bbl
- Cum Gas (all leases)
- 1,166,282 mcf
- Activities
- OPRS/G, OPRS/O
- Total Permits
- 7