42-507-32318

Final Completion Horizontal

R. M. GREGG UNIT

ZAVALA County · District 1 · MCDANIEL COMPANY INC. THE · PEARSALL (AUSTIN CHALK)

Permits

Max Depth

9,400 ft

First Permit

1990-05-02

Latest Activity

1999-05-21

Lifespan

9 yrs

Regulatory Status

Schedule

OFF SCHEDULE

Completion

1991-11-09

Shut-In

—

Plugged

1997-07-15

EWA / Production operator mismatch

Scheduling: MCDANIEL COMPANY INC. THE ≠ Production: HAWTHORN ENERGY PARTNERS, LLC (reported 2009-08)

EWA / Permit operator mismatch

Scheduling: MCDANIEL COMPANY INC. THE ≠ Permit: DOUBLE J OPERATING COMPANY, INC.

Resolved via: scheduling → MCDANIEL COMPANY INC. THE

Production Summary

Cum Oil

— bbl

Cum Gas

— mcf

First Production

1993-01

Last Production

2012-12

Operator History

Chain of Custody

ORYX ENERGY COMPANY 1993-1994→ DOUBLE J OPERATING COMPANY, INC. 1999-2004→ HAWTHORN ENERGY PARTNERS, LLC 2007-2009

Lease Production

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

Formation Tops (7) Elevation 562 ft (GR)

CSV

Formation	Top Depth (MD)	Subsea (+above / −below SL)
MIDWAY	2,518 ft	-1,956 ft
SAN MIGUEL	4,993 ft	-4,431 ft
ANACACHO	5,618 ft	-5,056 ft
UPPER CHALK	5,923 ft	-5,361 ft
UPPER CLALK	5,923 ft	-5,361 ft
LOWER CHALK	6,323 ft	-5,761 ft
BASE CHALK	6,506 ft	-5,944 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 (2)

Interval	Type
5,953–8,895 ft	Perforated
5,953–8,980 ft	Perforated

Casing (2)

Size	Set Depth	Cement
13.375"	725 ft	600 sx
9.625"	5,953 ft	1,115 sx

Permit History (3)

#484597 Reenter Final Completion

R. M. GREGG UNIT · 6,441 ft

1999-05-21

Spud 1999-05-21

#393002 Recompletion Final Completion

GREGG, R. M. UNIT · 6,441 ft

1991-10-17

Spud 1991-10-18

#372876 Drill Final Completion

R. M. GREGG UNIT · 9,400 ft

1990-05-02

Spud 1990-05-10

Applications (3)

#484597 A DOUBLE J OPERATING COMPANY, INC.

received 1999-05-17

#393002 A ORYX ENERGY COMPANY

received 1991-10-17

#372876 A ORYX ENERGY COMPANY

received 1990-05-02

Records & Logs

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

W-2/G-1 2008-04-16

W-2/G-1 2000-11-06

W-2/G-1 2001-05-10

W-2/G-1 1991-12-20 log on file

W-2/G-1 1990-08-03 log on file

W-2/G-1 1990-12-07

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 ZAVALA County.

Well Details

Well Number: 1
Max Depth: 9,400 ft
Drill Type: Horizontal
County: ZAVALA
District: 1
Operator: MCDANIEL COMPANY INC. THE
Completed: 1991-11-09

Operator

Name: MCDANIEL CO, INC., THE
Location: DALLAS
P-5 Status: Active (filed 2026-06-03)
Cum Oil (all leases): 1,152,855 bbl
Cum Gas (all leases): 545,868 mcf
Activities: OPRS/O
Total Permits: 6