42-103-31046
Final CompletionUNIVERSITY B
CRANE County · District 8 · UNION OIL COMPANY OF CALIFORNIA · MCELROY NORTH (ELLENBURGER)
Permits
3
Max Depth
12,019 ft
First Permit
1991-01-31
Latest Activity
2017-11-14
Lifespan
27 yrs
Regulatory Status
Schedule
OFF SCHEDULE
Completion
1975-05-15
Shut-In
—
Plugged
—
EWA / Production operator mismatch
Scheduling: UNION OIL COMPANY OF CALIFORNIA ≠ Production: R3 OPERATING CORPORATION (reported 2026-04)
EWA / Permit operator mismatch
Scheduling: UNION OIL COMPANY OF CALIFORNIA ≠ Permit: SEGURO OIL AND GAS, LLC
Resolved via: production → R3 OPERATING CORPORATION
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 (16) Elevation 2,651 ft (GL)
CSV| Formation | Top Depth (MD) | Subsea (+above / −below SL) |
|---|---|---|
| TOP TUBB (Tubb) | 6,213 ft | -3,562 ft |
| TOP WOLFCAMP (Wolfcamp) | 7,337 ft | -4,686 ft |
| TOP CISCO (Cisco) | 7,981 ft | -5,330 ft |
| TOP CANYON (Canyon) | 8,131 ft | -5,480 ft |
| TOP STRAWN (Strawn) | 8,717 ft | -6,066 ft |
| BEND DETRITAL (Bend) | 8,927 ft | -6,276 ft |
| TOP WOODFORD (Woodford) | 9,647 ft | -6,996 ft |
| TOP DEVONIAN (Devonian) | 9,945 ft | -7,294 ft |
| DEVONIAN | 9,950 ft | -7,299 ft |
| TOP SILURIAN (Silurian (undifferentiated)) | 10,905 ft | -8,254 ft |
| SILURAIN | 10,924 ft | -8,273 ft |
| SILURIAN (Silurian (undifferentiated)) | 10,924 ft | -8,273 ft |
| SIRLURIAN | 10,924 ft | -8,273 ft |
| TOP FUSSELMAN (Fusselman) | 10,965 ft | -8,314 ft |
| FUSSELMAN | 10,984 ft | -8,333 ft |
| MONTOYA | 11,127 ft | -8,476 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 ↗
Offset Well Tops (nearest 8 wells with tops)
What nearby completed wells reported.
Nearest wells within 10 mi (surface locations). Click wells to select them, then open the cross-section to compare tops side by side (max 6 wells per section, including this one).
Perforations (8)
| Interval | Type |
|---|---|
| 7,984–8,032 ft | Perforated |
| 10,732–10,738 ft | Perforated |
| 10,732–10,890 ft | Perforated |
| 10,850–10,890 ft | Perforated |
| 10,994–11,042 ft | Perforated |
| 11,074–11,106 ft | Perforated |
| 11,981–12,006 ft | Perforated |
| ?–11,991 ft | Perforated |
Casing (4)
| Size | Set Depth | Cement |
|---|---|---|
| 13.375" | 442 ft | 450 sx |
| 9.625" | 4,200 ft | 1,600 sx |
| 8.625" | 4,200 ft | 1,600 sx |
| 7" | 12,019 ft | 1,150 sx |
Permit History (3)
Applications (3)
Records & Logs
7 completion filings on record · 3 with log images at RRC.
+1 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.
Well Details
- Well Number
- 3
- Max Depth
- 12,019 ft
- Drill Type
- Vertical
- County
- CRANE
- District
- 8
- Operator
- UNION OIL COMPANY OF CALIFORNIA
- Completed
- 1975-05-15
Operator
- Location
- MIDLAND
- P-5 Status
- Inactive (filed 2020-11-18)
- Cum Oil (all leases)
- 78,952,713 bbl
- Cum Gas (all leases)
- 197,557,199 mcf
- Total Permits
- 2,336