THE BIG "O" UNIT

Oil · District 8A · Lease #67127

Operator: ROCA RESOURCE COMPANY, INC.

Cum Oil

69k BBL

Cum Gas

99k MCF

casinghead

Wells

1

Production

1993-07 — 2007-01

Peak Month

1993-11

Production History

Cum Oil: 68,823 BBL Cum Gas: 98,969 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,442 BBL/mo

Di (annual)

29.6%

b-factor

0.2

EUR

72,745 BBL

R-squared

0.811

type

hyperbolic

Operator History (from monthly production reports)

2003-08 — 2008-04 ROCA OPERATING, INC. 57 mo
1993-07 — 2003-07 ROCA RESOURCE COMPANY, INC. 121 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1ROCA OPERATING INC.19,4001993-06-16