42-391-01587

Final Completion

OCONNOR THOMAS -A-

REFUGIO County · District 2 · T-C OIL COMPANY LLC · TOM OCONNOR (5900 SAND)

Permits

Max Depth

5,919 ft

First Permit

1978-06-27

Latest Activity

2004-09-08

Lifespan

26 yrs

Regulatory Status

Schedule

OFF SCHEDULE

Completion

—

Shut-In

—

Plugged

2017-06-08

EWA / Permit operator mismatch

Scheduling: T-C OIL COMPANY LLC ≠ Permit: T - C OIL COMPANY

Resolved via: scheduling → T-C OIL COMPANY LLC

Production Summary

Cum Oil

— bbl

Cum Gas

— mcf

First Production

1993-01

Last Production

2017-07

Operator History

Chain of Custody

MELLON OIL UNIT 1993-2004→ T - C OIL COMPANY 2004-2011→ T-C OIL COMPANY, LLC 2012-2015

Lease Production

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

Formation Tops (4) Elevation 47 ft (GL)

CSV

Formation	Top Depth (MD)	Subsea (+above / −below SL)
LAGARTO	1 ft	+46 ft
MIOCENE (Miocene (undifferentiated))	2,150 ft	-2,103 ft
CATAHOULA	3,617 ft	-3,570 ft
GRETA	4,372 ft	-4,325 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
4,382–4,386 ft	Perforated
4,510–4,513 ft	Perforated
5,566–5,570 ft	Perforated
?–5,908 ft	Perforated

Casing (8)

Size	Set Depth	Cement
10.75"	1,132 ft	578 sx
10.75"	1,132 ft	578 sx
10.75"	1,134 ft	578 sx
2.375"	4,304 ft	—
2.375"	5,868 ft	—
5"	5,911 ft	528 sx
5"	5,911 ft	528 sx
5"	5,911 ft	528 sx

Permit History (3)

#550642 Recompletion Final Completion

COPANO GAS UNIT · 4,520 ft

2004-09-08

Spud 2005-01-12

#55562 Recompletion Final Completion

MELLON OIL UNIT · 5,919 ft

1979-08-06

#27433 Recompletion

O'CONNOR, THOS. "A" · 5,911 ft

1978-06-27

Applications (3)

#550642 A T - C OIL COMPANY

received 2004-09-08

#55562 A MELLON OIL UNIT

received 1979-08-06

#27433 A COPANO COMPANY

received 1978-06-27

Records & Logs

5 completion filings on record.

W-2/G-1 2005-02-24

W-2/G-1 2005-05-10

W-2/G-1 1979-09-05

W-2/G-1 1978-08-25

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 REFUGIO County.

Well Details

Well Number: 26
Max Depth: 5,919 ft
Drill Type: Vertical
County: REFUGIO
District: 2
Operator: T-C OIL COMPANY LLC

Operator

Name: T-C OIL CO, LLC
Location: REFUGIO
P-5 Status: Active (filed 2025-12-03)
Cum Oil (all leases): 13,683,333 bbl
Cum Gas (all leases): 22,912,895 mcf
Activities: CSGD/P, G/PUR, OPRS/G, OPRS/O
Total Permits: 283