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42-295-33495

Final Completion Horizontal

COOPER 435

LIPSCOMB County · District 10 · HIGHMARK ENERGY OPERATING LLC · LIPSCOMB (CLEVELAND)

Permits

1

Max Depth

9,000 ft

First Permit

2009-01-29

Latest Activity

2009-01-29

Lifespan

< 1 yr

Regulatory Status

Schedule

OFF SCHEDULE

Completion

2009-06-18

Shut-In

—

Plugged

2014-03-20

!

EWA / Production operator mismatch

Scheduling: HIGHMARK ENERGY OPERATING LLC ≠ Production: EOG RESOURCES, INC. (reported 2020-04)

!

EWA / Permit operator mismatch

Scheduling: HIGHMARK ENERGY OPERATING LLC ≠ Permit: EOG RESOURCES, INC.

Resolved via: scheduling → HIGHMARK ENERGY OPERATING LLC

Production Summary

Cum Oil

— bbl

Cum Gas

— mcf

First Production

2008-07

Last Production

2023-07

Operator History

originally filed by EOG RESOURCES, INC. — asset transferred

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 (1) Elevation 2,513 ft (GR)

CSV
FormationTop Depth (MD)Subsea (+above / −below SL)
CLEVELAND 8,325 ft-5,812 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)

IntervalType
8,600–11,895 ftPerforated

Casing (2)

SizeSet DepthCement
9.625"1,786 ft710 sx
4.5"12,032 ft1,230 sx

Permit History (1)

#676638 Drill Final Completion

COOPER 435 · 9,000 ft

2009-01-29

Spud 2009-04-29

Applications (1)

#676638 A EOG RESOURCES, INC.
received 2008-12-22

Records & Logs

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

W-2/G-1 2009-07-16 log on file
W-2/G-1 2009-08-29
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 LIPSCOMB County.

Well Details

Well Number
4H
Max Depth
9,000 ft
Drill Type
Horizontal
County
LIPSCOMB
District
10
Operator
HIGHMARK ENERGY OPERATING LLC
Completed
2009-06-18

Operator

Location
HOUSTON
P-5 Status
Active (filed 2026-03-09)
Cum Oil (all leases)
4,551,977 bbl
Cum Gas (all leases)
30,465,409 mcf
Activities
CSGD/G, G/PUR, GTHS/G, OPRS/G, OPRS/O
Total Permits
15