42-461-30206
Final CompletionMOBIL-COOK
UPTON County · District 7 · EXTEX OPERATING COMPANY · HELUMA EAST (DEVONIAN)
Permits
1
Max Depth
10,565 ft
First Permit
1991-02-19
Latest Activity
1991-02-19
Lifespan
< 1 yr
Regulatory Status
Schedule
OFF SCHEDULE
Completion
1985-02-14
Shut-In
—
Plugged
—
EWA / Permit operator mismatch
Scheduling: EXTEX OPERATING COMPANY ≠ Permit: ORYX ENERGY COMPANY
Resolved via: production → EXTEX OPERATING COMPANY
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 2,853 ft (GR)
CSV| Formation | Top Depth (MD) | Subsea (+above / −below SL) |
|---|---|---|
| CISCO | 7,523 ft | -4,670 ft |
| CISCO (PENN) (Cisco) | 7,523 ft | -4,670 ft |
| STRAWN DET (Strawn) | 7,780 ft | -4,927 ft |
| STRAWN DET. (Strawn) | 7,780 ft | -4,927 ft |
| DEVONIAN | 8,137 ft | -5,284 ft |
| SILURIAN (Silurian (undifferentiated)) | 9,310 ft | -6,457 ft |
| FUSSELMAN | 9,340 ft | -6,487 ft |
| MONTOYA | 9,431 ft | -6,578 ft |
| MCKEE | 9,778 ft | -6,925 ft |
| ELLENBURGER | 10,375 ft | -7,522 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 (6)
| Interval | Type |
|---|---|
| 7,633–7,886 ft | Perforated |
| 8,020–? ft | Perforated |
| 8,183–8,228 ft | Perforated |
| 8,183–8,792 ft | Perforated |
| 8,523–8,792 ft | Perforated |
| 10,408–? ft | Perforated |
Casing (3)
| Size | Set Depth | Cement |
|---|---|---|
| 13.375" | 510 ft | 500 sx |
| 9.625" | 3,800 ft | 1,200 sx |
| 7" | 10,564 ft | 560 sx |
Permit History (1)
Applications (1)
Records & Logs
8 completion filings on record · 1 with log images at RRC.
+2 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
- 3
- Max Depth
- 10,565 ft
- Drill Type
- Vertical
- County
- UPTON
- District
- 7
- Operator
- EXTEX OPERATING COMPANY
- Completed
- 1985-02-14
Operator
- Name
- EXTEX OPER CO
- Location
- HOUSTON
- P-5 Status
- Active (filed 2026-01-07)
- Cum Oil (all leases)
- 5,887,486 bbl
- Cum Gas (all leases)
- 10,031,045 mcf
- Activities
- OPRS/G, OPRS/O
- Total Permits
- 117