42-391-31356

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
5,232–5,244 ft	Perforated
5,415–5,423 ft	Perforated
5,470–5,476 ft	Perforated
5,500–5,507 ft	Perforated
5,536–5,542 ft	Perforated
5,812–5,822 ft	Perforated

Casing (4)

Size	Set Depth	Cement
10.75"	1,522 ft	800 sx
2.375"	5,452 ft	—
2.375"	5,781 ft	—
7"	7,922 ft	1,860 sx

Permit History (6)

#810522 Recompletion Final Completion

TOM O'CONNOR(5600 FOOT SAND)UN · 7,922 ft

2015-09-25

Spud 2015-10-13

#750779 Recompletion

CLEMENT HEARD · 7,922 ft

2012-11-09

#678507 Recompletion Final Completion

CLEMENT HEARD · 7,922 ft

2009-02-25

Spud 2009-02-12

#500845 Recompletion Final Completion

HEARD, CLEMENT · 7,922 ft

2000-10-18

Spud 2001-02-11

#60827 Drill Final Completion

HEARD, CLEMENT · 8,500 ft

1979-10-11

Spud 1979-10-03

#59984 Drill

HEARD, CLEMENT · 8,500 ft

1979-09-28

Applications (6)

#810522 A HILCORP ENERGY COMPANY

received 2015-09-21

#750779 A HILCORP ENERGY COMPANY

received 2012-11-01

#678507 A HILCORP ENERGY COMPANY

received 2009-02-12

#500845 A QUINTANA PET. CORP.

received 2000-10-16

#60827 A QUINTANA PET. CORP.

received 1979-10-11

#59984 A QUINTANA PET. CORP.

received 1979-09-28

Records & Logs

10 completion filings on record · 2 with log images at RRC.

W-2/G-1 2017-11-21

W-2/G-1 2015-11-06

W-2/G-1 2009-07-27 log on file

W-2/G-1 2009-09-09

W-2/G-1 2005-02-16

W-2/G-1 1979-10-30

+4 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: W523B
Max Depth: 8,500 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

42-391-31356

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 (4) Elevation 57 ft (GL)