ROBINSON

Oil · District 11 · Lease #68561

Operator: SCHALK OIL COMPANY, INC.

Cum Oil

127k BBL

Cum Gas

0 MCF

Wells

1

Production

2003-04 — 2023-06

Peak Month

2004-07

Production History

Cum Oil: 127,256 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

3,009 BBL/mo

Di (annual)

78.1%

b-factor

0.3

EUR

65,813 BBL

R-squared

0.851

type

hyperbolic

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1SCHALK OIL COMPANY, INC.15,2002003-03-12
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