SCHWARZ

Oil · District 8 · Lease #25487

Operator: STEPHENS EXPLORATION, INC.

Cum Oil

52k BBL

Cum Gas

0 MCF

Wells

3

Production

1993-01 — 2007-06

Peak Month

1993-03

Production History

Cum Oil: 52,136 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

826 BBL/mo

Di (annual)

14.3%

b-factor

0.0

EUR

69,139 BBL

R-squared

0.566

type

exponential

Wells (3)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
3PANTERA ENERGY COMPANY13,8501990-09-21
2PANTERA ENERGY COMPANY13,7501990-04-05
1PANTERA ENERGY COMPANY16,2001989-03-13
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