42-435-39097
SWR-10-WELLMAYFIELD 46
SUTTON County · District 7 · UPP OPERATING LLC · SAWYER (STRAWN NORTH)
Permits
1
Max Depth
8,700 ft
First Permit
2008-10-03
Latest Activity
2008-10-03
Lifespan
< 1 yr
Regulatory Status
Schedule
ON SCHEDULE
Completion
2008-12-18
Shut-In
—
Plugged
—
P-5 Org Status: Active
EWA / Permit operator mismatch
Scheduling: UPP OPERATING LLC ≠ Permit: HIGHMOUNT EXPL & PROD TEXAS LLC
Resolved via: production → UPP 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
2008-12
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 (4) Elevation 2,230 ft (GR)
CSV| Formation | Top Depth (MD) | Subsea (+above / −below SL) |
|---|---|---|
| BASE CRETACEOUS (Base Cretaceous (marker)) | 808 ft | +1,422 ft |
| WOLFCAMP | 3,543 ft | -1,313 ft |
| CANYON | 6,142 ft | -3,912 ft |
| STRAWN | 7,658 ft | -5,428 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 |
|---|---|
| 6,164–7,154 ft | Perforated |
| 7,660–8,360 ft | Perforated |
Casing (3)
| Size | Set Depth | Cement |
|---|---|---|
| 13.375" | 299 ft | 500 sx |
| 8.625" | 2,398 ft | 620 sx |
| 4.5" | 8,408 ft | 700 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 can't be deep-linked — clicking copies the API for you to paste.
No GPS coordinates yet
Well Details
- Well Number
- 28
- Max Depth
- 8,700 ft
- Drill Type
- Vertical
- County
- SUTTON
- District
- 7
- Operator
- UPP OPERATING LLC
- Completed
- 2008-12-18
Operator
- Name
- UPP OPER, LLC
- Location
- HOUSTON
- P-5 Status
- Active (filed 2026-03-06)
- Cum Oil (all leases)
- 293,241 bbl
- Cum Gas (all leases)
- 486,804,996 mcf
- Activities
- CSGD/G, CSGD/P, G/PUR, GTHS/G, OPRS/G, OPRS/O
- Total Permits
- 33