42-391-01715

Final Completion

NORDAN & MORRIS OCONNOR THOMAS

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

Permits

Max Depth

5,913 ft

First Permit

1980-08-07

Latest Activity

2011-01-12

Lifespan

30 yrs

Regulatory Status

Schedule

OFF SCHEDULE

Completion

—

Shut-In

—

Plugged

2016-08-04

EWA / Production operator mismatch

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

EWA / Permit operator mismatch

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

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

QUINTANA PET. CORP. 1993-2000→ HILCORP ENERGY COMPANY 2000-2026→ T - C OIL COMPANY 2010-2011→ T-C OIL COMPANY, LLC 2012-2012

Lease Production

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

Formation Tops (12) Elevation 51 ft (GL)

CSV

Formation	Top Depth (MD)	Subsea (+above / −below SL)
LARGARTO (Lagarto)	1,500 ft	-1,449 ft
MIOCENE (Miocene (undifferentiated))	2,282 ft	-2,231 ft
OAKVILLE	2,750 ft	-2,699 ft
CATAHOULA (MIOCENE) (Catahoula)	3,300 ft	-3,249 ft
CATAHOULA	3,615 ft	-3,564 ft
ANAHUAC (MIOCENE) (Anahuac)	4,100 ft	-4,049 ft
FRIO-GRETA (OLIGOCENE) (Frio)	4,365 ft	-4,314 ft
GRETA	4,387 ft	-4,336 ft
MIDDLE FRIO (SINTON) (Frio)	5,000 ft	-4,949 ft
FRIO	5,090 ft	-5,039 ft
LOWER FRIO (OLIGOCENE) (Frio)	5,880 ft	-5,829 ft
LAGARTO	—	—

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 (2)

Interval	Type
5,340–5,345 ft	Perforated
5,722–5,726 ft	Perforated

Casing (3)

Size	Set Depth	Cement
10.75"	1,220 ft	528 sx
2.375"	5,711 ft	—
7"	5,903 ft	528 sx

Permit History (3)

#707933 Recompletion Final Completion

COPANO GAS UNIT · 5,670 ft

2011-01-12

Spud 2010-12-09

#351688 Recompletion Final Completion

TOM O'CONNOR(5800SAND)FIELD UNIT · 5,908 ft

1988-09-29

#89049 Recompletion Final Completion

NORDAN & MORRIS, THOS. O'CONNOR · 5,913 ft

1980-08-07

Applications (3)

#707933 A T - C OIL COMPANY

received 2011-01-05

#351688 A QUINTANA PET. CORP.

received 1988-09-28

#89049 A NORDAN & COMPANY

received 1980-08-07

Records & Logs

6 completion filings on record.

W-2/G-1 2013-01-02

W-2/G-1 2011-01-18

W-2/G-1 1988-10-06

W-2/G-1 1988-11-10

W-2/G-1 1980-09-23

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: 41
Max Depth: 5,913 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