Sept. 2011C Corporate Pres

Page 32

Production History of Federal 32-4TFH Well at Lewis & Clark (1) (2) (3) 1200 Gross Production @ 7/15/11: 145 BOE/D

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(1)

The graph above reflects production from November 23, 2009 through June 30, 2011.

(2)

The Federal 32-4TFH was completed in the Three Forks formation on 11/23/09 flowing 1,970 BOE/D. Total monthly production from all Whiting-operated wells in North Dakota is reported to the North Dakota Industrial Commission (NDIC) at approximately the end of the following month. The NDIC included only 8 days of production from the Federal 32-4TFH in November 2009. Thus, the NDIC reported total production in the first six months for the Federal 32-4TFH to be 51,000 BOE during a 159-day period. NOTE: Production in the first six months (181 days) totaled 66,300 BOE. Through 06/30/2011 cum prod 137,573 BOE.

(3)

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