42-391-00679

Formation	Top Depth (MD)	Subsea (+above / −below SL)
LARGARTO (Lagarto)	1,500 ft	-1,447 ft
OAKVILLE	2,750 ft	-2,697 ft
CATAHOULA (MIOCENE) (Catahoula)	3,300 ft	-3,247 ft
CATAHOULA	3,578 ft	-3,525 ft
ANAHAUC (MIOCENE)	4,100 ft	-4,047 ft
ANAHUAC (MIOCENE) (Anahuac)	4,100 ft	-4,047 ft
FRIO	4,333 ft	-4,280 ft
FRIO-GRETA (OLIGOCENE) (Frio)	4,365 ft	-4,312 ft
MIDDLE FRIO (SINTON) (Frio)	5,000 ft	-4,947 ft
LOWER FRIO (OLIGOCENE) (Frio)	5,880 ft	-5,827 ft
JACKSON/YEGUA (Jackson)	—	—
NO CHANGE	—	—

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 (11)

Interval	Type
4,099–4,109 ft	Perforated
4,396–4,402 ft	Perforated
5,248–5,268 ft	Perforated
5,278–5,290 ft	Perforated
5,298–5,304 ft	Perforated
5,515–5,523 ft	Perforated
5,597–5,609 ft	Perforated
5,622–5,630 ft	Perforated
5,705–5,711 ft	Perforated
5,736–5,742 ft	Perforated
?–5,759 ft	Perforated

Casing (3)

Size	Set Depth	Cement
9.625"	1,055 ft	350 sx
5"	5,914 ft	500 sx
5"	5,925 ft	500 sx

Permit History (8)

#808017 Recompletion Final Completion

TOM O'CONNOR (4150 FT. SD.) UNIT · 5,927 ft

2015-07-10

Spud 2015-07-02

#724390 Recompletion

MRS. FANNIE V. W. HEARD · 5,927 ft

2011-09-20

#695098 Recompletion Final Completion

MRS. FANNIE V. W. HEARD · 5,927 ft

2010-05-03

Spud 2010-06-02

#545543 Recompletion

HEARD, MRS. FANNIE V. W. · 5,927 ft

2004-05-17

#530275 Recompletion Final Completion

HEARD, FANNIE V. W. MRS · 5,927 ft

2003-04-07

Spud 2003-04-23

#518814 Recompletion Final Completion

HEARD, MRS. FANNIE V. W. · 5,927 ft

2002-04-09

Spud 2002-05-03

#490571 Recompletion Final Completion

HEARD, FANNIE V. W. MRS. · 5,927 ft

1999-12-23

Spud 2000-05-09

#228575 Recompletion Final Completion

HEARD, FANNIE V. W. MRS. · 5,927 ft

1984-02-07

Applications (8)

#808017 A HILCORP ENERGY COMPANY

received 2015-07-01

#724390 A HILCORP ENERGY COMPANY

received 2011-09-16

#695098 A HILCORP ENERGY COMPANY

received 2010-04-27

#545543 A HILCORP ENERGY COMPANY

received 2004-05-10

#530275 A HILCORP ENERGY COMPANY

received 2003-04-03

#518814 A HILCORP ENERGY COMPANY

received 2002-04-04

#490571 A QUINTANA PET. CORP.

received 1999-12-21

#228575 A QUINTANA PET. CORP.

received 1984-02-06

Records & Logs

15 completion filings on record · 4 with log images at RRC.

W-2/G-1 2015-07-17

W-2/G-1 2010-07-12 log on file

W-2/G-1 2010-09-02

W-2/G-1 2003-05-13 log on file

W-2/G-1 2003-09-24

W-2/G-1 2002-06-12 log on file

+9 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: W310A
Max Depth: 5,927 ft
Drill Type: Vertical
County: REFUGIO
District: 2
Operator: HILCORP ENERGY COMPANY

Operator

Name: HILCORP ENGY CO
Location: HOUSTON
P-5 Status: X (filed 2026-03-27)
Cum Oil (all leases): 75,699,281 bbl
Cum Gas (all leases): 1,779,939,645 mcf
Activities: CSGD/G, CSGD/P, G/PUR, GTHS/C, GTHS/G, GTHS/O, OPRS/G, OPRS/O
Total Permits: 3,428

42-391-00679

Regulatory Status

Production SummaryBeta Production data is a work in progress — still being validated against RRC filings. Spot something off or have questions? [email protected]

Operator History

Lease Production

Formation Tops (12) Elevation 53 ft (GL)