42-391-01581

Final Completion

OCONNOR THOMAS -A-

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

Permits

Max Depth

5,920 ft

First Permit

1979-05-16

Latest Activity

1983-11-17

Lifespan

5 yrs

Regulatory Status

Schedule

OFF SCHEDULE

Completion

—

Shut-In

—

Plugged

—

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: COPANO COMPANY

Resolved via: production → HILCORP ENERGY COMPANY

Production Summary

Cum Oil

— bbl

Cum Gas

— mcf

First Production

1993-01

Last Production

2026-07

Injection / Disposal

H-1 Injection Active UIC #000078955 permitted 1993-06-14

Permitted Volume

7,500 bbl/d

Max Pressure

2,250 psi

Injection Interval

5,784–5,799 ft

Injected (12mo)

367,292 bbl

Monthly injected volume (bbl, from H-10 filings through 2025-09-01)

Operator History

Chain of Custody

QUINTANA PET. CORP. 1993-2000→ HILCORP ENERGY COMPANY 2000-2026

Lease Production

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

Formation Tops (16) Elevation 49 ft (GR)

CSV

Formation	Top Depth (MD)	Subsea (+above / −below SL)
LAGARTO	1 ft	+48 ft
LARGARTO (Lagarto)	1,500 ft	-1,451 ft
EOCENE	2,485 ft	-2,436 ft
OAKVILLE	2,750 ft	-2,701 ft
MIOCENE (Miocene (undifferentiated))	3,120 ft	-3,071 ft
CATAHOULA (MIOCENE) (Catahoula)	3,300 ft	-3,251 ft
CATAHOULA	3,635 ft	-3,586 ft
CATAHOULA	3,650 ft	-3,601 ft
ANAHUAC (MIOCENE) (Anahuac)	4,100 ft	-4,051 ft
FRIO-GRETA (OLIGOCENE) (Frio)	4,365 ft	-4,316 ft
GRETA	4,415 ft	-4,366 ft
FRIO	4,443 ft	-4,394 ft
FRIO	4,830 ft	-4,781 ft
MIDDLE FRIO (SINTON) (Frio)	5,000 ft	-4,951 ft
LOWER FRIO (OLIGOCENE) (Frio)	5,880 ft	-5,831 ft
JACKSON/YEGUA (Jackson)	—	—

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 (6)

Interval	Type
5,625–5,855 ft	Perforated
5,740–5,748 ft	Perforated
5,784–5,799 ft	Perforated
5,786–5,792 ft	Perforated
5,791–5,799 ft	Perforated
?–5,800 ft	Perforated

Casing (5)

Size	Set Depth	Cement
10.75"	1,128 ft	528 sx
1.875"	5,572 ft	—
1.875"	5,792 ft	—
5"	5,910 ft	528 sx
3.5"	—	—

Permit History (2)

#220850 Recompletion Final Completion

O'CONNOR, THOMAS -A- · 5,920 ft

1983-11-17

#48633 Recompletion

O'CONNOR, THOMAS "A" · 5,920 ft

1979-05-16

Applications (2)

#220850 A COPANO COMPANY

received 1983-11-14

#48633 A COPANO COMPANY

received 1979-05-16

Records & Logs

8 completion filings on record.

W-2/G-1 2017-02-16

W-2/G-1 1994-06-20

W-2/G-1 1993-03-15

W-2/G-1 1993-04-20

W-2/G-1 1984-05-22

+2 more filings

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: A3U
Max Depth: 5,920 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