HOEFS 52-23

Oil · District 08 · Lease #39866

Operator: CHESAPEAKE OPERATING, INC.

Cum Oil

30k BBL

Cum Gas

60k MCF

casinghead

Wells

1

Production

2009-10 — 2010-11

Peak Month

2009-12

Production History

Cum Oil: 29,565 BBL Cum Gas: 60,393 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

4,519 BBL/mo

Di (annual)

887.2%

b-factor

1.9

EUR

158,681 BBL

R-squared

0.694

type

hyperbolic

Operator History (from monthly production reports)

2009-10 — 2011-04 CHESAPEAKE OPERATING, INC. 19 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1COG OPERATING LLC120,0002009-07-15