42-391-01602

Final Completion

OCONNOR THOMAS -B-

REFUGIO County · District 2 · T - C OIL COMPANY · TOM OCONNOR (5800)

Permits

Max Depth

5,945 ft

First Permit

1977-08-02

Latest Activity

1995-07-10

Lifespan

18 yrs

Regulatory Status

Schedule

OFF SCHEDULE

Completion

—

Shut-In

—

Plugged

—

EWA / Production operator mismatch

Scheduling: T - C OIL COMPANY ≠ Production: HILCORP ENERGY COMPANY (reported 2026-04)

EWA / Permit operator mismatch

Scheduling: T - C OIL COMPANY ≠ Permit: QUINTANA PET. CORP.

Resolved via: production → HILCORP ENERGY COMPANY

Production Summary

Cum Oil

— bbl

Cum Gas

— mcf

First Production

1993-01

Last Production

2026-07

Operator History

Chain of Custody

COPANO COMPANY 1993-1998→ QUINTANA PET. CORP. 1993-2000→ HILCORP ENERGY COMPANY 2000-2026→ T - C OIL COMPANY 2006-2010

Lease Production

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

Formation Tops (7) Elevation 47 ft

CSV

Formation	Top Depth (MD)	Subsea (+above / −below SL)
LARGARTO (Lagarto)	1,500 ft	-1,453 ft
OAKVILLE	2,750 ft	-2,703 ft
CATAHOULA(MIOCENE) (Catahoula)	3,300 ft	-3,253 ft
ANAHUAC(MIOCENE) (Anahuac)	4,100 ft	-4,053 ft
FRIO-GRETA(OLIGOCENE) (Frio)	4,365 ft	-4,318 ft
MIDDLE FRIO(SINTON) (Frio)	5,000 ft	-4,953 ft
LOWER FRIO(OLIGOCENE) (Frio)	5,800 ft	-5,753 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
5,798–5,802 ft	Perforated
5,842–5,850 ft	Perforated
?–5,446 ft	Perforated
?–5,800 ft	Perforated

Casing (3)

Size	Set Depth	Cement
10.75"	1,121 ft	500 sx
10.75"	1,140 ft	528 sx
5"	5,913 ft	500 sx

Permit History (2)

#437467 Recompletion Final Completion

TOM O'CONNOR(5800 SAND)FLD. UNIT · 5,945 ft

1995-07-10

Spud 1995-10-31

#4417 Recompletion

O'CONNOR, THOS. -B- · 5,925 ft

1977-08-02

Applications (2)

#437467 A QUINTANA PET. CORP.

received 1995-07-03

#4417 A COPANO COMPANY

received 1977-08-02

Records & Logs

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

W-2/G-1 1995-11-20

W-2/G-1 1995-11-16 log on file

W-2/G-1 1995-12-18

W-2/G-1 1977-08-12

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 REFUGIO County.

Well Details

Well Number: C222
Max Depth: 5,945 ft
Drill Type: Vertical
County: REFUGIO
District: 2
Operator: T - C OIL COMPANY

Operator

Name: T - C OIL CO
Location: REFUGIO
P-5 Status: Inactive (filed 2011-11-07)
Cum Oil (all leases): 15,292,994 bbl
Cum Gas (all leases): 112,873,669 mcf
Total Permits: 1,009