Whiting Petroleum Corporation ( NYSE: WLL) announced that its Board of Directors declared today a dividend of $1.5625 per share on its 6.25% convertible perpetual preferred stock (NYSE: WLL-PrA). The dividend is payable on June 15, 2012 to holders of record on June 1, 2012. About Whiting Petroleum Corporation Whiting Petroleum Corporation, a Delaware corporation, is an independent oil and gas company that acquires, exploits, develops and explores for crude oil, natural gas and natural gas liquids primarily in the Permian Basin, Rocky Mountains, Mid-Continent, Gulf Coast and Michigan regions of the United States. The Company trades publicly under the symbol WLL on the New York Stock Exchange. Although the convertible perpetual preferred stock trades publicly under the symbol WLL-PrA on the New York Stock Exchange, most stock search services use WLL-A or WLL-PA to locate the preferred stock. For further information, please visit www.whiting.com.