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HIRSCH ESTATE 537

WEBB County · District 4 · HILCORP ENERGY COMPANY · BIG COWBOY (LOBO)

Permits

Max Depth

9,750 ft

First Permit

1998-02-04

Latest Activity

2001-03-15

Lifespan

3 yrs

Regulatory Status

Schedule

ON SCHEDULE

Completion

2001-05-08

Shut-In

—

Plugged

—

P-5 Org Status: X

EWA / Production operator mismatch

Scheduling: HILCORP ENERGY COMPANY ≠ Production: CONOCOPHILLIPS COMPANY (reported 2003-09)

EWA / Permit operator mismatch

Scheduling: HILCORP ENERGY COMPANY ≠ Permit: CONOCO INC.

Resolved via: scheduling → HILCORP ENERGY COMPANY

Production Summary

Cum Oil

— bbl

Cum Gas

— mcf

First Production

1998-05

Last Production

2026-07

Operator History

Chain of Custody

CONOCO INC. 1998-2002→ CONOCOPHILLIPS COMPANY 2003-2003

Lease Production

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

Gas

production & DCA →

Formation Tops (2) Elevation 519 ft (GL)

CSV

Formation	Top Depth (MD)	Subsea (+above / −below SL)
BASE OF LOWER WILCOX (Wilcox)	7,595 ft	-7,076 ft
WILLS POINT	8,670 ft	-8,151 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
7,774–7,818 ft	Perforated
7,774–7,824 ft	Perforated
7,784–7,814 ft	Perforated
8,588–8,648 ft	Perforated

Casing (3)

Size	Set Depth	Cement
8.625"	522 ft	190 sx
5.5"	7,158 ft	289 sx
2.875"	9,035 ft	525 sx

Permit History (2)

#506523 Recompletion Final Completion

HIRSCH ESTATE 537 · 9,050 ft

2001-03-15

Spud 2001-03-12

#472932 Drill Final Completion

HIRSCH ESTATE 537 · 9,750 ft

1998-02-04

Spud 1998-03-15

Applications (2)

#506523 A CONOCO INC.

received 2001-03-15

#472932 A CONOCO INC.

received 1998-02-04

Records & Logs

3 completion filings on record · 1 with log images at RRC.

W-2/G-1 2001-06-26

W-2/G-1 1998-05-26 log on file

W-2/G-1 1998-06-01

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 WEBB County.

Well Details

Well Number: 4
Max Depth: 9,750 ft
Drill Type: Vertical
County: WEBB
District: 4
Operator: HILCORP ENERGY COMPANY
Completed: 2001-05-08

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: 3,430