42-507-32271

Final Completion Horizontal

GLASSCOCK RANCH A

ZAVALA County · District 1 · TRINITY OPERATING (USG) LLC · PEARSALL (AUSTIN CHALK)

Permits

Max Depth

7,000 ft

First Permit

1989-11-22

Latest Activity

1992-11-20

Lifespan

3 yrs

Regulatory Status

Schedule

OFF SCHEDULE

Completion

1989-12-21

Shut-In

—

Plugged

2022-05-05

EWA / Production operator mismatch

Scheduling: TRINITY OPERATING (USG) LLC ≠ Production: MATADOR PRODUCTION COMPANY (reported 2021-07)

EWA / Permit operator mismatch

Scheduling: TRINITY OPERATING (USG) LLC ≠ Permit: WINN EXPLORATION CO., INC.

Resolved via: scheduling → TRINITY OPERATING (USG) LLC

Production Summary

Cum Oil

— bbl

Cum Gas

— mcf

First Production

1993-01

Last Production

2024-05

Operator History

Chain of Custody

WINN EXPLORATION CO., INC. 1993-1994→ MCDAY ENERGY CORP. 1994-2010→ MATADOR PRODUCTION COMPANY 2011-2021

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 673 ft (GL)

CSV

Formation	Top Depth (MD)	Subsea (+above / −below SL)
ESCONDIDO	3,360 ft	-2,687 ft
OLMOS	4,500 ft	-3,827 ft
SAN MIGUEL	5,318 ft	-4,645 ft
ANACACHO	5,874 ft	-5,201 ft
AUSTIN CHALK	6,175 ft	-5,502 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
5,330–5,376 ft	Perforated
6,175–6,362 ft	Perforated
6,175–6,531 ft	Perforated

Casing (2)

Size	Set Depth	Cement
10.75"	745 ft	480 sx
7"	5,922 ft	450 sx

Permit History (2)

#406406 Other Final Completion

GLASSCOCK, LETA · 7,000 ft

1992-11-20

Spud 1992-11-20

#366871 Drill Final Completion

GLASSCOCK, LETA · 7,000 ft

1989-11-22

Spud 1989-11-28

Applications (2)

#406406 A WINN EXPLORATION CO., INC.

received 1992-11-20

#366871 A WINN EXPLORATION CO., INC.

received 1989-11-22

Records & Logs

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

W-2/G-1 2000-07-20

W-2/G-1 1993-06-28 log on file

W-2/G-1 1989-12-29 log on file

W-2/G-1 1990-01-09

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 ZAVALA County.

Well Details

Well Number: 12
Max Depth: 7,000 ft
Drill Type: Horizontal
County: ZAVALA
District: 1
Operator: TRINITY OPERATING (USG) LLC
Completed: 1989-12-21

Operator

Name: TRINITY OPER (USG), LLC
Location: HOUSTON
P-5 Status: Active (filed 2026-01-28)
Cum Oil (all leases): 22,515,031 bbl
Cum Gas (all leases): 284,930,581 mcf
Activities: OPRS/G, OPRS/O
Total Permits: 391