SHACKELFORD

Oil · District 08 · Lease #33001

Operator: SUMMIT PETROLEUM LLC

Cum Oil

122k BBL

Cum Gas

1.0M MCF

casinghead

Wells

3

Production

1993-01 — 2009-12

Peak Month

1994-08

Production History

Cum Oil: 122,079 BBL Cum Gas: 1,001,537 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

2,827 BBL/mo

Di (annual)

40.2%

b-factor

0.3

EUR

119,280 BBL

R-squared

0.975

type

hyperbolic

Operator History (from monthly production reports)

2021-02 — 2026-07 EXTEX OPERATING COMPANY 66 mo
2007-10 — 2021-01 LEGACY RESERVES OPERATING LP 160 mo
2007-05 — 2007-09 SUMMIT PETROLEUM LLC 5 mo
2001-04 — 2007-04 HENRY PETROLEUM LP 73 mo
1993-01 — 2001-03 HENRY PETROLEUM CORP. 99 mo

Wells (3)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2EXTEX OPERATING COMPANY18,7351990-11-07
3EXTEX OPERATING COMPANY18,7351990-11-07
1EXTEX OPERATING COMPANY18,7351990-10-25