Exhibit 12

Whiting Petroleum Corporation

Ratio of Earnings to Fixed Charges

Ratio of Earnings to Fixed Charges and Preferred Dividends

(in thousands)

	Three Months
	Ended			Year Ended December 31,
	March 31, 2014			2013			2012			2011			2010			2009
Fixed charges:
Interest expensed	$	36,784		$	100,531		$	65,692		$	53,834		$	48,486		$	53,582
Interest capitalized		706			1,515			2,749			3,574			2,920			3,406
Amortized premiums, discounts and capitalized expenses related to indebtedness		5,360			12,405			9,518			8,682			10,592			11,026
Estimate of interest within rental expense		321			1,008			1,145			883			684			603
Total fixed charges	$	43,171		$	115,459		$	79,104		$	66,973		$	62,682		$	68,617
Earnings:
Income (loss) before income taxes	$	185,412		$	571,871		$	662,011		$	780,319		$	541,443		$	(162,835	)
Income from equity investees		(72	)		(542	)		(588	)		(1,032	)		(1,311	)		(1,581	)
Fixed charges (above)		43,171			115,459			79,104			66,973			62,682			68,617
Amortization of capitalized interest		543			2,020			1,745			1,409			1,117			776
Distributed income from equity investees		393			654			930			1,533			1,323			1,780
Interest capitalized		(706	)		(1,515	)		(2,749	)		(3,574	)		(2,920	)		(3,406	)
Noncontrolling interest in pre-tax income of subsidiaries		18			52			90			59			—			—
Total earnings	$	228,759		$	687,999		$	740,543		$	845,687		$	602,334		$	(96,649	)
Ratio of earnings to fixed charges (unaudited) (1)		5.30			5.96			9.36			12.63			9.61			—
Fixed charges and preferred stock dividends:
Fixed charges (above)	$	43,171		$	115,459		$	79,104		$	66,973		$	62,682		$	68,617
Preferred stock dividends (2)		—			844			1,722			1,704			26,516			15,695
Total fixed charges and preferred stock dividends	$	43,171		$	116,303		$	80,826		$	68,677		$	89,198		$	84,312
Ratio of earnings to fixed charges and preferred stock dividends (unaudited) (3)		5.30			5.92			9.16			12.31			6.75			—

(1) For the year ended December 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 1.00x (one-to-one coverage) was $165.3 million for the year ended December 31, 2009.

(2) Preferred stock dividends represent pre-tax earnings required to cover any referred stock dividend requirements using our effective tax rate for the relevant period.

(3) For the year ended December 31, 2009, earnings were inadequate to cover fixed charges and perferred stock dividends, and the ratio of earnings to fixed charges and perferred stock dividends therefore has not been presented for that period. The coverage deficiency necessary for the ratio of earnings to fixed charges and perferred stock dividends to equal 1.00x (one-to-one coverage) was $181.0 million for the year ended December 31, 2009.