42-339-30608

KEYSTONE MILLS

MONTGOMERY County · District 3 · EXXON MOBIL CORPORATION

Permits

Max Depth

12,000 ft

First Permit

1983-09-30

Latest Activity

2001-05-25

Lifespan

18 yrs

Regulatory Status

Schedule

OFF SCHEDULE

Completion

—

Shut-In

—

Plugged

—

Production Summary

Cum Oil

— bbl

Cum Gas

— mcf

First Production

1993-01

Last Production

2026-07

Injection / Disposal

H-1 Injection Inactive UIC #000100534 permitted 2009-03-31

Permitted Volume

25,000 bbl/d

Max Pressure

2,300 psi

Injection Interval

4,600–6,300 ft

Injected (12mo)

—

Operator History

Chain of Custody

EXXON CORP. 1993-2000→ EXXON MOBIL CORPORATION 2000-2001→ WAPITI OPERATING, LLC 2009-2009→ 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 (8) Elevation 29 ft

CSV

Formation	Top Depth (MD)	Subsea (+above / −below SL)
2 B MAIN	5,042 ft	-5,013 ft
2B MAIN	5,042 ft	-5,013 ft
WILCOX 1 (Wilcox)	7,842 ft	-7,813 ft
WILCOX 8600 (Wilcox)	8,420 ft	-8,391 ft
WILCOX 9250 A (Wilcox)	8,971 ft	-8,942 ft
WILCOX 9250A (Wilcox)	8,971 ft	-8,942 ft
WILCOX 9600 (Wilcox)	9,570 ft	-9,541 ft
WILCOX 25 (Wilcox)	10,286 ft	-10,257 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
7,842–7,854 ft	Perforated
10,286–10,300 ft	Perforated

Casing (4)

Size	Set Depth	Cement
13.375"	1,634 ft	1,425 sx
7.625"	3,702 ft	2,630 sx
7.625"	8,702 ft	2,630 sx
5.5"	10,480 ft	265 sx

Permit History (2)

#509449 Recompletion

KEYSTONE MILLS · 10,324 ft

2001-05-25

#215645 Drill Final Completion

KEYSTONE MILLS · 12,000 ft

1983-09-30

Spud 1983-12-09

Applications (2)

#509449 A EXXON MOBIL CORPORATION

received 2001-05-25

#215645 A EXXON CORP.

received 1983-09-23

Records & Logs

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

W-2/G-1 2018-12-09

W-2/G-1 2015-04-08

W-2/G-1 2009-07-01 log on file

W-2/G-1 2009-10-16

W-2/G-1 1984-10-26

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: 40
Max Depth: 12,000 ft
Drill Type: Vertical
County: MONTGOMERY
District: 3
Operator: EXXON MOBIL CORPORATION

Operator

Name: EXXON MOBIL CORP
Location: SPRING
P-5 Status: Delinquent (filed 2025-04-16)
Cum Oil (all leases): 155,164,556 bbl
Cum Gas (all leases): 2,032,561,175 mcf
Activities: CSGD/G, CSGD/P, G/PUR, GTHS/C, GTHS/G
Total Permits: 1,223