Exhibit 12

Whiting Petroleum Corporation and Subsidiaries
Ratio of Earnings to Fixed Charges
(dollars in thousands)

	Three Months
	Ended			Year Ended December 31,
	March 31, 2009			2008			2007			2006			2005			2004
Fixed charges:
Interest expensed	$	13,098		$	59,010		$	65,977		$	66,265		$	35,245		$	11,800
Interest capitalized		924			3,129			3,664			556			—			200
Amortized premiums, discounts and capitalized expenses related to indebtedness		1,582			6,068			6,527			7,224			6,802			4,056
Estimate of interest within rental expense		145			431			424			386			298			182
Total fixed charges		15,749			68,638			76,592			74,431			42,345			16,238
Earnings:
Income before income taxes	$	(69,803	)	$	408,820		$	207,162		$	233,272		$	196,098		$	114,005
Income from equity investees		(544	)		(1,625	)		(1,365	)		(282	)		(409	)		—
Fixed charges (above)		15,749			68,638			76,592			74,431			42,345			16,238
Amortization of capitalized interest		194			463			97			41			41			21
Distributed income from equity investees		455			1,175			928			987			657			—
Interest capitalized		(924	)		(3,129	)		(3,664	)		(556	)		—			(200	)
Total earnings	$	(54,873	)	$	474,942		$	279,750		$	307,893		$	238,732		$	130,064
Ratio of earnings to fixed charges (unaudited)(1)		—			6.92			3.65			4.14			5.64			8.01

(1) For the three months ended March 31, 2009, earnings were inadequate to cover fixed charges, and the ratio of earnings to fixed charges therefore has not been presented for that period. The coverage deficiency necessary for the ratio of earnings to fixed charges to equal 1.00 (one-to-one coverage) was $70.6 million for the three months ended March 31, 2009.