Whiting Petroleum Corporation (NYSE: WLL) today announced that it has commenced an offer to exchange all of its outstanding, unregistered 5.750% Senior Notes due 2021 (CUSIP Nos. 966387AJ1 and U9650FAC1) (the "Original Notes") issued September 26, 2013, for new, registered 5.750% Senior Notes due 2021 (CUSIP No. 966387AH5) (the "New Notes"), which are an additional issuance of and will be fully fungible and form a single series voting together as one class with the $800 million aggregate principal amount of its 5.750% Senior Notes due 2021 issued on September 12, 2013 (the “September Notes”). The terms of the New Notes to be issued in the exchange offer are substantially identical to those of the Original Notes, except that the New Notes will be part of the same series as, and be fully fungible with, the September Notes and have the same CUSIP number as the September Notes, the New Notes will not have securities law transfer restrictions and the registration rights relating to the Original Notes and the New Notes will not provide for the payment of additional interest under circumstances relating to the timing of the exchange offer. The exchange offer will expire at 5:00 p.m. New York City time, on December 13, 2013, unless extended by Whiting Petroleum Corporation. Valid tenders of the Original Notes must be made, and may be withdrawn at any time, before the exchange offer expires. Documents describing the terms of the exchange offer, including the prospectus and transmittal materials for making tenders, may be obtained from the exchange agent, The Bank of New York Mellon Trust Company, N.A., by overnight or hand delivery or mail at The Bank of New York Mellon Trust Company, N.A., Corporate Trust Operations, Reorganization Unit, 111 Sanders Creek Parkway, East Syracuse, NY 13057, Attention: Dacia Brown, (315) 414-3349, or by facsimile (for Eligible Institutions Only) at (504) 212-1610, Attention: Corporate Trust Operations Reorganizations Unit.