42-339-30831

Final Completion

CONROE FIELD UNIT

MONTGOMERY County · District 3 · HIGHMARK ENERGY OPERATING LLC · CONROE

Permits

Max Depth

5,230 ft

First Permit

1989-03-20

Latest Activity

1997-08-19

Lifespan

8 yrs

Regulatory Status

Schedule

OFF SCHEDULE

Completion

1996-04-02

Shut-In

—

Plugged

—

EWA / Permit operator mismatch

Scheduling: HIGHMARK ENERGY OPERATING LLC ≠ Permit: EXXON CORP.

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

H-1 Injection Cancelled 1998-03-25 UIC #000071685 permitted 1989-12-04

Permitted Volume

20,000 mcf/d

Max Pressure

2,300 psi

Injection Interval

4,725–5,100 ft

Injected (12mo)

—

Operator History

Chain of Custody

EXXON CORP. 1993-2000→ EXXON MOBIL CORPORATION 2000-2006→ WAPITI OPERATING, LLC 2006-2009→ DENBURY ONSHORE, LLC 2010-2024→ HIGHMARK ENERGY OPERATING, LLC 2024-2026

Lease Production

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

Formation Tops (11) Elevation 172 ft (DF)

CSV

Formation	Top Depth (MD)	Subsea (+above / −below SL)
MOODYS BRANCH	4,727 ft	-4,555 ft
MOODYS BRANCH	4,732 ft	-4,560 ft
1ST UP. COCKFIELD	4,761 ft	-4,589 ft
MAIN CONROE SANDS	4,872 ft	-4,700 ft
1M	4,874 ft	-4,702 ft
2A	4,913 ft	-4,741 ft
2C	4,935 ft	-4,763 ft
3B	5,020 ft	-4,848 ft
4A	5,076 ft	-4,904 ft
4M	5,081 ft	-4,909 ft
4A	5,216 ft	-5,044 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 (7)

Interval	Type
4,774–4,790 ft	Perforated
4,818–4,834 ft	Perforated
4,874–4,882 ft	Perforated
4,912–4,921 ft	Perforated
4,976–4,979 ft	Perforated
5,020–5,024 ft	Perforated
5,080–5,084 ft	Perforated

Casing (3)

Size	Set Depth	Cement
8.625"	1,616 ft	580 sx
8.625"	1,616 ft	580 sx
5.5"	5,225 ft	285 sx

Permit History (2)

#466484 Reclass Final Completion

CONROE FIELD UNIT · 4,938 ft

1997-08-19

Spud 1997-08-04

#357195 Drill U

CONROE FIELD UNIT · 5,230 ft

1989-03-20

Applications (2)

#466484 A EXXON CORP.

received 1997-08-19

#357195 A EXXON CORP.

received 1989-03-20

Records & Logs

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

W-2/G-1 2009-08-31

W-2/G-1 2009-11-23

W-2/G-1 2010-01-13

W-2/G-1 1999-06-29

W-2/G-1 1998-09-22

W-2/G-1 1997-10-13 log on file

+8 more filings

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 MONTGOMERY County.

Well Details

Well Number: 3540
Max Depth: 5,230 ft
Drill Type: Vertical
County: MONTGOMERY
District: 3
Operator: HIGHMARK ENERGY OPERATING LLC
Completed: 1996-04-02

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