RINEHART A

Oil · District 11 · Lease #68727

Operator: SCHALK OIL COMPANY, INC.

Cum Oil

120k BBL

Cum Gas

0 MCF

Wells

1

Production

2004-12 — 2026-03

Peak Month

2005-04

Production History

Cum Oil: 119,827 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

1,459 BBL/mo

Di (annual)

51.6%

b-factor

0.9

EUR

101,160 BBL

R-squared

0.576

type

hyperbolic

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1SCHALK OIL COMPANY, INC.15,4002004-11-03
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