42-003-35972

SHUT IN

UNIVERSITY -154-

ANDREWS County · District 8 · HIGHMARK ENERGY OPERATING LLC · SHAFTER LAKE (DEVONIAN)

Permits

Max Depth

9,950 ft

First Permit

1987-11-24

Latest Activity

1988-07-18

Lifespan

< 1 yr

Regulatory Status

Schedule

ON SCHEDULE

Completion

1988-08-30

Shut-In

—

Plugged

—

P-5 Org Status: Active

EWA / Production operator mismatch

Scheduling: HIGHMARK ENERGY OPERATING LLC ≠ Production: LEGACY RESERVES OPERATING LP (reported 2021-05)

EWA / Permit operator mismatch

Scheduling: HIGHMARK ENERGY OPERATING LLC ≠ Permit: ARCO OIL & GAS CO.

Resolved via: scheduling → HIGHMARK ENERGY OPERATING LLC

Production Summary

Cum Oil

— bbl

Cum Gas

— mcf

First Production

1993-01

Last Production

2026-07

Operator History

Chain of Custody

HENRY PETROLEUM CORP. 1993-2001→ HENRY PETROLEUM LP 2001-2008→ COG OPERATING LLC 2009-2012→ LEGACY RESERVES OPERATING LP 2013-2021

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 (5) Elevation 3,256 ft (GR)

CSV

Formation	Top Depth (MD)	Subsea (+above / −below SL)
YATES	2,995 ft	+261 ft
SAN ANDRES	4,520 ft	-1,264 ft
GLORIETA	5,800 ft	-2,544 ft
WOODFORD	9,330 ft	-6,074 ft
DEVONIAN	9,469 ft	-6,213 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
9,470–9,581 ft	Perforated
9,648–9,677 ft	Perforated
9,783–9,814 ft	Perforated

Casing (3)

Size	Set Depth	Cement
13.375"	1,750 ft	1,420 sx
9.625"	5,800 ft	2,550 sx
7"	9,900 ft	1,770 sx

Permit History (2)

#348857 Recompletion U

UNIVERSITY "154" · 9,900 ft

1988-07-18

#339329 Drill Final Completion

UNIVERSITY "154" · 9,950 ft

1987-11-24

Applications (2)

#348857 A ARCO OIL & GAS CO.

received 1988-07-14

#339329 A ARCO OIL & GAS CO.

received 1987-11-24

Records & Logs

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

W-2/G-1 1988-10-18

W-2/G-1 1988-03-09

W-2/G-1 1988-03-09 log on file

W-2/G-1 1988-03-23

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 ANDREWS County.

Well Details

Well Number: 19
Max Depth: 9,950 ft
Drill Type: Vertical
County: ANDREWS
District: 8
Operator: HIGHMARK ENERGY OPERATING LLC
Completed: 1988-08-30

Operator

Name: HIGHMARK ENGY OPER, LLC
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