42-003-05463

Final Completion

SHAFTER LAKE /WOLFCAMP/ UNIT

ANDREWS County · District 8 · ARCO OIL & GAS CO. · SHAFTER LAKE (WOLFCAMP)

Permits

Max Depth

11,900 ft

First Permit

1987-04-07

Latest Activity

1989-09-12

Lifespan

2 yrs

Regulatory Status

Schedule

OFF SCHEDULE

Completion

—

Shut-In

—

Plugged

—

EWA / Production operator mismatch

Scheduling: ARCO OIL & GAS CO. ≠ Production: HIGHMARK ENERGY OPERATING, LLC (reported 2026-04)

Resolved via: production → HIGHMARK ENERGY OPERATING, LLC

Production Summary

Cum Oil

— bbl

Cum Gas

— mcf

First Production

1993-01

Last Production

2026-07

Injection / Disposal

ANDREWS County disposal market →

UIC Permit Cancelled 1989-02-21 UIC #000019713

Permitted Volume

—

Max Pressure

—

Injection Interval

—

Injected (12mo)

—

Operator History

Chain of Custody

HENRY PETROLEUM CORP. 1993-2001→ HENRY PETROLEUM LP 2001-2008→ COG OPERATING LLC 2009-2012→ LEGACY RESERVES OPERATING LP 2013-2020→ HIGHMARK ENERGY OPERATING, LLC 2023-2026

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 (7)

CSV

Formation	Top Depth (MD)
RUSTLER	1,883 ft
YATES	2,950 ft
SAN ANDRES	4,500 ft
WOLFCAMP	8,410 ft
DEVONIAN	9,365 ft
ELLENBURGER	11,682 ft
ELLEN.	11,685 ft

As reported by operators on W-2/G-1 completion filings (RRC wellbore records). Depths are measured depth; names appear as filed. View filings & logs at RRC ↗

Perforations (3)

Interval	Type
9,644–9,650 ft	Perforated
9,694–9,708 ft	Perforated
11,685–11,726 ft	Perforated

Casing (3)

Size	Set Depth	Cement
13.375"	282 ft	250 sx
9.625"	4,074 ft	1,500 sx
7"	9,391 ft	750 sx

Permit History (2)

#362867 Recompletion Final Completion

UNIV.NOS.#141A,#155F,#173J,#174K · 11,900 ft

1989-09-12

#328416 Recompletion Final Completion

SKELLY UNIVERSITY "173" · 11,900 ft

1987-04-07

Applications (2)

#362867 A ARCO OIL & GAS CO.

received 1989-08-17

#328416 A ARCO OIL & GAS CO.

received 1987-03-30

Records & Logs

7 completion filings on record · 3 with log images at RRC.

W-2/G-1 1989-10-13 log on file

W-2/G-1 1989-11-18

W-2/G-1 1989-03-13

W-2/G-1 1987-08-05 log on file

W-2/G-1 1987-08-20

+1 more filings

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: J 8
Max Depth: 11,900 ft
Drill Type: Vertical
County: ANDREWS
District: 8
Operator: ARCO OIL & GAS CO.

Operator

Name: ARCO OIL & GAS CO.-SILSBEE
Location: PLANO
P-5 Status: Inactive (filed 2004-11-23)
Cum Oil (all leases): 16,679,531 bbl
Cum Gas (all leases): 57,198,899 mcf
Total Permits: 3,065