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42-507-32374

Final Completion Horizontal

GLASSCOCK RANCH A

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

Permits

1

Max Depth

7,000 ft

First Permit

1990-10-03

Latest Activity

1990-10-03

Lifespan

< 1 yr

Regulatory Status

Schedule

OFF SCHEDULE

Completion

1990-11-22

Shut-In

—

Plugged

2023-02-15

!

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 (1) Elevation 650 ft (GR)

CSV
FormationTop Depth (MD)Subsea (+above / −below SL)
AUSTIN CHALK 5,837 ft-5,187 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 (1)

IntervalType
5,590–9,668 ftPerforated

Casing (2)

SizeSet DepthCement
10.75"755 ft495 sx
7"5,590 ft645 sx

Permit History (1)

#378786 Drill Final Completion

GLASSCOCK, LETA · 7,000 ft

1990-10-03

Spud 1990-10-07

Applications (1)

#378786 A WINN EXPLORATION CO., INC.
received 1990-10-02

Records & Logs

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

W-2/G-1 1990-12-28 log on file
W-2/G-1 1991-02-11
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
35
Max Depth
7,000 ft
Drill Type
Horizontal
County
ZAVALA
District
1
Operator
TRINITY OPERATING (USG) LLC
Completed
1990-11-22

Operator

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