42-163-32960

Final Completion Horizontal

PANTHER HOLLOW

FRIO County · District 1 · ORYX ENERGY COMPANY · PEARSALL (AUSTIN CHALK)

Permits

Max Depth

11,300 ft

First Permit

1990-12-20

Latest Activity

2011-05-09

Lifespan

20 yrs

Regulatory Status

Schedule

OFF SCHEDULE

Completion

1991-02-09

Shut-In

—

Plugged

1995-03-17

EWA / Production operator mismatch

Scheduling: ORYX ENERGY COMPANY ≠ Production: MUELLER EXPLORATION, INC. (reported 2023-03)

EWA / Permit operator mismatch

Scheduling: ORYX ENERGY COMPANY ≠ Permit: U.S. ENERCORP, LTD.

Resolved via: scheduling → ORYX ENERGY COMPANY

Production Summary

Cum Oil

— bbl

Cum Gas

— mcf

First Production

1993-01

Last Production

2026-07

Operator History

Chain of Custody

ORYX ENERGY COMPANY 1993-1996→ U.S. ENERCORP, LTD. 2009-2016→ MUELLER EXPLORATION, INC. 2016-2023

Lease Production

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

Formation Tops (12) Elevation 628 ft (GR)

CSV

Formation	Top Depth (MD)	Subsea (+above / −below SL)
MIDWAY	3,300 ft	-2,672 ft
SAN MIGUEL	5,362 ft	-4,734 ft
ANACACHO	6,014 ft	-5,386 ft
TOP OF ANACACHO (Anacacho)	6,143 ft	-5,515 ft
ANACACHO MARKER (Anacacho)	6,149 ft	-5,521 ft
ANACACHO	6,160 ft	-5,532 ft
TOP OF AUSTIN CHALK (Austin Chalk)	6,400 ft	-5,772 ft
TOP OF AUSTIN CHALK (Austin Chalk)	6,407 ft	-5,779 ft
AUSTIN CHALK	6,416 ft	-5,788 ft
AUSTIN CHALK MARKER (Austin Chalk)	6,453 ft	-5,825 ft
AUSTIN CHALK MARKER (Austin Chalk)	6,459 ft	-5,831 ft
LOWER CHALK	6,619 ft	-5,991 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 (3)

Interval	Type
6,509–10,990 ft	Perforated
6,618–9,962 ft	Open hole
6,875–11,429 ft	Open hole

Casing (3)

Size	Set Depth	Cement
13.375"	920 ft	700 sx
9.625"	6,509 ft	1,590 sx
7"	6,875 ft	225 sx

Permit History (4)

#715683 Recompletion Final Completion

RALLY PETROLEUM · 6,776 ft

2011-05-09

Spud 2011-05-11

#684574 Reenter Final Completion

RALLY PETROLEUM · 7,150 ft

2009-08-28

Spud 2009-09-01

#684574 Reenter

RALLY PETROLEUM · 7,150 ft

2009-08-28

#382629 Drill Final Completion

PANTHER HOLLOW · 11,300 ft

1990-12-20

Spud 1990-12-23

Applications (4)

#715683 A U.S. ENERCORP, LTD.

received 2011-05-04

#684574 A U.S. ENERCORP, LTD.

received 2009-11-17

#684574 A U.S. ENERCORP, LTD.

received 2009-08-27

#382629 A ORYX ENERGY COMPANY

received 1990-12-20

Records & Logs

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

W-2/G-1 2011-09-22 log on file

W-2/G-1 2009-11-19 log on file

W-2/G-1 2010-05-18 log on file

W-2/G-1 1991-02-28 log on file

W-2/G-1 1992-12-03

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 FRIO County.

Well Details

Well Number: 1H
Max Depth: 11,300 ft
Drill Type: Horizontal
County: FRIO
District: 1
Operator: ORYX ENERGY COMPANY
Completed: 1991-02-09

Operator

Name: SANCHEZ-O'BRIEN OIL & GAS CORP
Location: DALLAS
P-5 Status: Inactive (filed 1998-03-27)
Cum Oil (all leases): 48,027,931 bbl
Cum Gas (all leases): 270,942,656 mcf
Total Permits: 1,627