42-427-32015

Final Completion

MARRS MCLEAN

STARR County · District 4 · SUN EXPL. & PROD. CO.-CORPUS · LOCKHART (COCKFIELD 4 UP)

Permits

Max Depth

5,000 ft

First Permit

1985-04-25

Latest Activity

2004-01-23

Lifespan

19 yrs

Regulatory Status

Schedule

OFF SCHEDULE

Completion

1985-06-02

Shut-In

—

Plugged

—

EWA / Production operator mismatch

Scheduling: SUN EXPL. & PROD. CO.-CORPUS ≠ Production: WHITE STRIDE LLC (reported 2026-03)

EWA / Permit operator mismatch

Scheduling: SUN EXPL. & PROD. CO.-CORPUS ≠ Permit: WHITE OAK OPERATING COMPANY LLC

Resolved via: production → WHITE STRIDE LLC

Production Summary

Cum Oil

— bbl

Cum Gas

— mcf

First Production

1993-01

Last Production

2026-07

Operator History

Chain of Custody

SOUTH TEXAS LIMITED PARTNERSHIP 1993-1994→ WASHINGTON ENERGY EXPL., INC. 1994-1994→ CABOT OIL & GAS PRODUCTION CORP. 1994-1996→ CABOT OIL & GAS CORPORATION 1996-1997→ CENIZA PETROLEUM, INC. 1997-2002→ FREDCO 2002-2003→ WHITE OAK OPERATING COMPANY LLC 2003-2004→ OPEX ENERGY, LLC 2004-2007→ EXPLORATION COMPANY, THE 2007-2007→ TXCO RESOURCES INC. 2007-2008→ CONTINENTAL OPERATING CO. 2008-2019→ MAVERICK BROTHERS OPERATING,INC. 2019-2025→ WHITE STRIDE LLC 2025-2026

Lease Production

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

Formation Tops (2) Elevation 372 ft (DF)

CSV

Formation	Top Depth (MD)	Subsea (+above / −below SL)
(COCKFIELD 4, UP)	3,917 ft	-3,545 ft
COCKFIELD 4, UP.	3,917 ft	-3,545 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 (4)

Interval	Type
3,556–3,562 ft	Perforated
3,727–3,735 ft	Perforated
3,737–3,743 ft	Perforated
3,917–3,922 ft	Perforated

Casing (2)

Size	Set Depth	Cement
8.625"	485 ft	305 sx
4.5"	4,800 ft	650 sx

Permit History (3)

#537423 Recompletion Final Completion

MCLEAN, MARRS · 3,600 ft

2004-01-23

Spud 2003-06-20

#329085 Recompletion Final Completion

MARRS-MCLEAN · 4,800 ft

1987-05-15

#273335 Drill Final Completion

MARRS-MCLEAN · 5,000 ft

1985-04-25

Spud 1985-05-22

Applications (3)

#537423 A WHITE OAK OPERATING COMPANY LLC

received 2003-10-10

#329085 A SUN EXPL. & PROD. CO.-CORPUS

received 1987-04-16

#273335 A SUN EXPL. & PROD. CO.-CORPUS

received 1985-03-21

Records & Logs

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

W-2/G-1 2003-09-25 log on file

W-2/G-1 2004-02-19

W-2/G-1 1987-09-17

W-2/G-1 1987-09-29

W-2/G-1 1987-07-10

W-2/G-1 1987-08-04

+4 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 STARR County.

Well Details

Well Number: 26
Max Depth: 5,000 ft
Drill Type: Vertical
County: STARR
District: 4
Operator: SUN EXPL. & PROD. CO.-CORPUS
Completed: 1985-06-02

Operator

Name: SUN EXPL. & PROD. CO.-HOUSTON
Location: HOUSTON
P-5 Status: Inactive
Cum Oil (all leases): — bbl
Cum Gas (all leases): — mcf
Total Permits: 1,290