CHALK -A-

Oil · District 08 · Lease #31394

Operator: EXCEL ENERGY CO.

Cum Oil

188k BBL

Cum Gas

152 MCF

casinghead

Wells

8

Production

1993-01 — 2011-11

Peak Month

1993-05

Production History

Cum Oil: 188,410 BBL Cum Gas: 152 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,065 BBL/mo

Di (annual)

3.9%

b-factor

1.3

EUR

368,119 BBL

R-squared

0.782

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 (8)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
9SWEET CRUDE OPERATING LLC13,1001986-12-16
8SWEET CRUDE OPERATING LLC13,1001986-08-14
142-227-00163SWEET CRUDE OPERATING LLC------
242-227-04330SWEET CRUDE OPERATING LLC------
342-227-02479SWEET CRUDE OPERATING LLC------
542-227-02478SWEET CRUDE OPERATING LLC------
642-227-02481SWEET CRUDE OPERATING LLC------
742-227-30036SWEET CRUDE OPERATING LLC------