42-435-34897

PRODUCING

MAYER EDWIN S. JR.

SUTTON County · District 7 · UPP OPERATING LLC · SAWYER (CANYON)

Permits

Max Depth

8,050 ft

First Permit

1998-08-31

Latest Activity

2001-03-29

Lifespan

3 yrs

Regulatory Status

Schedule

ON SCHEDULE

Completion

2001-04-16

Shut-In

—

Plugged

—

P-5 Org Status: Active

EWA / Permit operator mismatch

Scheduling: UPP OPERATING LLC ≠ Permit: DREYFUS, LOUIS NATURAL GAS CORP

Resolved via: production → UPP OPERATING, LLC

Production Summary

Cum Oil

— bbl

Cum Gas

— mcf

First Production

1998-09

Last Production

2026-07

Operator History

Chain of Custody

DREYFUS, LOUIS NATURAL GAS CORP 1998-2001→ DOMINION OKLAHOMA TEXAS E&P, INC 2001-2007→ HIGHMOUNT EXPL & PROD TEXAS LLC 2008-2014→ ENERVEST OPERATING, L.L.C. 2014-2019→ UPP OPERATING, LLC 2019-2026

Lease Production

Production is reported at the lease level. View production data, decline curves, and history on the lease page.

Formation Tops (4) Elevation 2,351 ft (GR)

CSV

Formation	Top Depth (MD)	Subsea (+above / −below SL)
BASE CRETACEOUS (Base Cretaceous (marker))	890 ft	+1,461 ft
WOLFCAMP	3,849 ft	-1,498 ft
CANYON	6,975 ft	-4,624 ft
STRAWN	7,479 ft	-5,128 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 (3)

Interval	Type
6,443–6,883 ft	Perforated
7,535–7,614 ft	Perforated
7,742–7,771 ft	Perforated

Casing (2)

Size	Set Depth	Cement
8.625"	1,126 ft	290 sx
4.5"	8,030 ft	600 sx

Permit History (2)

#507175 Recompletion Final Completion

MAYER, EDWIN S. JR. · 8,050 ft

2001-03-29

Spud 2001-04-10

#479166 Drill Final Completion

MAYER, EDWIN S., JR. · 8,050 ft

1998-08-31

Spud 1998-09-04

Applications (2)

#507175 A DREYFUS, LOUIS NATURAL GAS CORP

received 2001-03-29

#479166 A DREYFUS, LOUIS NATURAL GAS CORP

received 1998-08-31

Records & Logs

4 completion filings on record · 1 with log images at RRC.

W-2/G-1 2001-05-04

W-2/G-1 2001-06-07

W-2/G-1 1998-10-22 log on file

W-2/G-1 1998-11-03

Completion packets + logs ↗ Wellbore filings ↗

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

Coordinates come from the RRC GIS backfill and usually appear within days of permit issuance. Located in SUTTON County.

Well Details

Well Number: 303
Max Depth: 8,050 ft
Drill Type: Vertical
County: SUTTON
District: 7
Operator: UPP OPERATING LLC
Completed: 2001-04-16

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