42-435-37453
PRODUCING DirectionalMAYFIELD 40
SUTTON County · District 7 · UPP OPERATING LLC · SAWYER (STRAWN NORTH)
Permits
1
Max Depth
8,750 ft
First Permit
2005-06-06
Latest Activity
2005-06-06
Lifespan
< 1 yr
Regulatory Status
Schedule
ON SCHEDULE
Completion
2005-09-04
Shut-In
—
Plugged
—
P-5 Org Status: Active
EWA / Permit operator mismatch
Scheduling: UPP OPERATING LLC ≠ Permit: DOMINION OKLAHOMA TEXAS E&P, INC
Resolved via: scheduling → 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
2005-09
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 2,222 ft (GR)
CSV| Formation | Top Depth (MD) | Subsea (+above / −below SL) |
|---|---|---|
| BASE CRETACEOUS (Base Cretaceous (marker)) | 815 ft | +1,407 ft |
| WOLFCAMP | 3,428 ft | -1,206 ft |
| CANYON | 6,312 ft | -4,090 ft |
| STRAWN | 7,966 ft | -5,744 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 (1)
| Interval | Type |
|---|---|
| 8,154–8,354 ft | Perforated |
Casing (3)
| Size | Set Depth | Cement |
|---|---|---|
| 13.375" | 297 ft | 350 sx |
| 8.625" | 2,292 ft | 650 sx |
| 4.5" | 8,465 ft | 800 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
- 18D
- Max Depth
- 8,750 ft
- Drill Type
- Directional
- County
- SUTTON
- District
- 7
- Operator
- UPP OPERATING LLC
- Completed
- 2005-09-04
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