CHALK -A-

Oil · District 08 · Lease #31451

Operator: EXCEL ENERGY CO.

Cum Oil

23k BBL

Cum Gas

152 MCF

casinghead

Wells

2

Production

1993-01 — 2011-11

Peak Month

1993-05

Production History

Cum Oil: 23,472 BBL Cum Gas: 152 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

154 BBL/mo

Di (annual)

6.8%

b-factor

0.9

EUR

39,179 BBL

R-squared

0.806

type

hyperbolic

Operator History (from monthly production reports)

2003-09 — 2012-03 EXCEL ENERGY CO. 103 mo
1993-01 — 2003-08 CALLEY, BOB 128 mo

Wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
11SWEET CRUDE OPERATING LLC37,4752005-10-24
10SWEET CRUDE OPERATING LLC12,6001987-08-24