CULPEPPER "A"

Oil · District 01 · Lease #13478

Operator: ENERVEST OPERATING, L.L.C.

Cum Oil

196k BBL

Cum Gas

163k MCF

casinghead

Wells

2

Production

1993-01 — 2009-12

Peak Month

1998-02

Production History

Cum Oil: 195,810 BBL Cum Gas: 163,087 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

3,956 BBL/mo

Di (annual)

52.0%

b-factor

0.4

EUR

148,101 BBL

R-squared

0.884

type

hyperbolic

Operator History (from monthly production reports)

2010-02 — 2014-06 CHESAPEAKE OPERATING, INC. 53 mo
2009-07 — 2010-01 ENERVEST OPERATING, L.L.C. 7 mo
1993-01 — 2009-06 CHESAPEAKE OPERATING, INC. 198 mo

Wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1CHESAPEAKE OPERATING INC.312,8001997-12-04
1HCHESAPEAKE OPERATING INC.312,8001997-12-04