MALLET "C"

Oil · District 8A · Lease #5985

Operator: WESTPORT OIL AND GAS COMPANY, LP

Fields: SLAUGHTER

Cum Oil

114k BBL

Cum Gas

119k MCF

casinghead

Wells

13

Production

1993-01 — 2026-04

Peak Month

2004-07

Production History

Cum Oil: 114,208 BBL Cum Gas: 118,828 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,643 BBL/mo

Di (annual)

15.2%

b-factor

0.0

EUR

129,909 BBL

R-squared

0.462

type

exponential

Operator History (from monthly production reports)

2025-10 — 2026-07 EXTEX OPERATING COMPANY 10 mo
2022-01 — 2025-09 NEW HORIZON RESOURCES LLC 45 mo
2020-05 — 2021-12 EXTEX OPERATING COMPANY 20 mo
2019-09 — 2020-04 GRIZZLY OP OF DELAWARE, LLC 8 mo
2015-05 — 2019-08 VANGUARD OPERATING, LLC 52 mo
2012-04 — 2015-04 VANGUARD PERMIAN, LLC 37 mo
2009-09 — 2012-03 ENCORE ENERGY PARTNERS OPER LLC 31 mo
2005-12 — 2009-08 ENCORE OPERATING, L.P. 45 mo
2002-03 — 2005-11 WESTPORT OIL AND GAS COMPANY, LP 45 mo
1998-09 — 2002-02 BELCO ENERGY CORP. 42 mo
1995-01 — 1998-08 CODA ENERGY, INC. 44 mo
1993-01 — 1994-12 MOBIL PRODUCING TX. & N.M. INC. 24 mo

Wells (13)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
11EXTEX OPERATING COMPANY25,2001985-09-05
12EXTEX OPERATING COMPANY25,2001985-09-05
10EXTEX OPERATING COMPANY15,2001978-12-15
1W42-079-01450EXTEX OPERATING COMPANY------
1WS42-079-81802EXTEX OPERATING COMPANY------
242-079-01496EXTEX OPERATING COMPANY------
342-079-01502EXTEX OPERATING COMPANY------
442-079-01505EXTEX OPERATING COMPANY------
5W42-079-01489EXTEX OPERATING COMPANY------
6W42-079-01498EXTEX OPERATING COMPANY------
742-079-01493EXTEX OPERATING COMPANY------
8W42-079-01495EXTEX OPERATING COMPANY------
942-079-30434EXTEX OPERATING COMPANY------