42-461-31531

Final Completion

WAHLENMAIER 42

UPTON County · District 7 · ATLAS OPERATING LLC · SPRABERRY (TREND AREA CL. FK.)

Permits

Max Depth

9,000 ft

First Permit

1979-12-31

Latest Activity

1984-12-03

Lifespan

5 yrs

Regulatory Status

Schedule

OFF SCHEDULE

Completion

1984-12-19

Shut-In

—

Plugged

2019-04-18

EWA / Permit operator mismatch

Scheduling: ATLAS OPERATING LLC ≠ Permit: ENSOURCE INC.

Resolved via: scheduling → ATLAS OPERATING LLC

Production Summary

Cum Oil

— bbl

Cum Gas

— mcf

First Production

1993-01

Last Production

2026-07

Operator History

Chain of Custody

UMC PETROLEUM CORPORATION 1993-1997→ PIONEER EXPLORATION COMPANY 1997-2001→ PIONEER EXPLORATION, LTD. 2001-2007→ PIONEER EXPLORATION, LLC 2008-2010→ ATLAS OPERATING LLC 2010-2021

Lease Production

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

Oil

production & DCA →

Formation Tops (6) Elevation 2,757 ft (GR)

CSV

Formation	Top Depth (MD)	Subsea (+above / −below SL)
CLEARFORK (Clear Fork)	6,490 ft	-3,733 ft
SPRABERRY	7,774 ft	-5,017 ft
JO MILL	8,175 ft	-5,418 ft
JOMILL	8,175 ft	-5,418 ft
DEAN	8,620 ft	-5,863 ft
WOLFCAMP	8,789 ft	-6,032 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
6,530–7,043 ft	Perforated
7,737–8,785 ft	Perforated

Casing (3)

Size	Set Depth	Cement
8.625"	763 ft	325 sx
2.375"	8,593 ft	—
4.5"	8,950 ft	800 sx

Permit History (2)

#259546 Recompletion Final Completion

WAHLENMAIER "42" · 7,250 ft

1984-12-03

#67935 Drill Final Completion

WAHLENMAIER 42 · 9,000 ft

1979-12-31

Applications (2)

#259546 A ENSOURCE INC.

received 1984-11-19

#67935 A PALO-PLACER

received 1979-12-31

Records & Logs

4 completion filings on record.

W-2/G-1 1985-12-18

W-2/G-1 1984-12-27

W-2/G-1 1985-01-08

W-2/G-1 1980-10-10

Completion packets + logs ↗ Wellbore 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

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

Well Details

Well Number: 1
Max Depth: 9,000 ft
Drill Type: Vertical
County: UPTON
District: 7
Operator: ATLAS OPERATING LLC
Completed: 1984-12-19

Operator

Name: ATLAS OPER LLC
Location: HOUSTON
P-5 Status: H (filed 2026-03-09)
Cum Oil (all leases): 7,184,429 bbl
Cum Gas (all leases): 10,995,911 mcf
Activities: CSGD/G, CSGD/P, G/PUR, GTHS/G, OPRS/G, OPRS/O
Total Permits: 78