ROBINSON

Oil · District 11 · Lease #68589

Operator: SCHALK OIL COMPANY, INC.

Cum Oil

227k BBL

Cum Gas

0 MCF

Wells

1

Production

2003-06 — 2026-03

Peak Month

2003-10

Production History

Cum Oil: 227,227 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

2,531 BBL/mo

Di (annual)

13.4%

b-factor

0.0

EUR

226,669 BBL

R-squared

0.815

type

exponential

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2SCHALK OIL COMPANY, INC.15,3002003-05-20
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