42-135-35678
SHUT INTXL NORTH UNIT
ECTOR County · District 8 · FORMENTERA OPERATIONS LLC · TXL (TUBB)
Permits
1
Max Depth
7,100 ft
First Permit
1987-10-28
Latest Activity
1987-10-28
Lifespan
< 1 yr
Regulatory Status
Schedule
ON SCHEDULE
Completion
1987-12-17
Shut-In
—
Plugged
—
P-5 Org Status: X
EWA / Permit operator mismatch
Scheduling: FORMENTERA OPERATIONS LLC ≠ Permit: SHELL WESTERN E&P INC.
Resolved via: production → FORMENTERA OPERATIONS 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 (10) Elevation 3,303 ft (GR)
CSV| Formation | Top Depth (MD) | Subsea (+above / −below SL) |
|---|---|---|
| RUSTLER | 1,477 ft | +1,826 ft |
| YATES | 2,761 ft | +542 ft |
| SEVEN RIVERS | 2,952 ft | +351 ft |
| QUEEN | 3,418 ft | -115 ft |
| SAN ANDRES | 4,138 ft | -835 ft |
| UPPER CLEARFORK (5600) (Clear Fork) | 5,481 ft | -2,178 ft |
| TUBB | 6,078 ft | -2,775 ft |
| LOWER CLEARFORK (Clear Fork) | 6,135 ft | -2,832 ft |
| WICHITA (Wichita-Albany) | 6,591 ft | -3,288 ft |
| BASE UNIT | 6,831 ft | -3,528 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 |
|---|---|
| 5,588–6,248 ft | Perforated |
| 6,490–6,625 ft | Perforated |
Casing (3)
| Size | Set Depth | Cement |
|---|---|---|
| 14" | 40 ft | — |
| 8.625" | 1,505 ft | 750 sx |
| 5.5" | 6,880 ft | 1,550 sx |
Permit History (1)
Applications (1)
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 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
- 521
- Max Depth
- 7,100 ft
- Drill Type
- Vertical
- County
- ECTOR
- District
- 8
- Operator
- FORMENTERA OPERATIONS LLC
- Completed
- 1987-12-17
Operator
- Location
- AUSTIN
- P-5 Status
- X (filed 2026-06-11)
- Cum Oil (all leases)
- 7,170,117 bbl
- Cum Gas (all leases)
- 53,235,974 mcf
- Activities
- CSGD/P, G/PUR, OPRS/G, OPRS/O
- Total Permits
- 72