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42-507-30358

Final Completion

GLASSCOCK RANCH A

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

Permits

1

Max Depth

5,000 ft

First Permit

1990-12-18

Latest Activity

1990-12-18

Lifespan

< 1 yr

Regulatory Status

Schedule

OFF SCHEDULE

Completion

1978-11-01

Shut-In

—

Plugged

2005-02-17

!

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

2026-07

Operator History

Chain of Custody

OVERLY OPERATING CO. 1993-1994→ 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 →
Oil
production & DCA →
Oil
production & DCA →

Formation Tops (1)

CSV
FormationTop Depth (MD)
OLMOS 4,670 ft

As reported by operators on W-2/G-1 completion filings (RRC wellbore records). Depths are measured depth; names appear as filed. View filings & logs at RRC ↗

Perforations (3)

IntervalType
4,670–4,715 ftPerforated
6,304–6,384 ftPerforated
?–6,384 ftPerforated

Casing (3)

SizeSet DepthCement
8.625"425 ft300 sx
8.625"425 ft300 sx
4.5"7,000 ft1,160 sx

Permit History (1)

#382531 Recompletion Final Completion

GLASSCOCK, LETA · 5,000 ft

1990-12-18

Spud 1990-12-18

Applications (1)

#382531 A WINN EXPLORATION CO., INC.
received 1990-12-18

Records & Logs

5 completion filings on record.

W-2/G-1 1993-01-19
W-2/G-1 1991-03-06
W-2/G-1 1991-03-13
W-2/G-1 1976-06-25
W-2/G-1 1984-01-12
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
5205
Max Depth
5,000 ft
Drill Type
Vertical
County
ZAVALA
District
1
Operator
TRINITY OPERATING (USG) LLC
Completed
1978-11-01

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