For more information: www.macquarie.com/energyAbout Whiting Petroleum Corporation Whiting Petroleum Corporation (NYSE: WLL), a Delaware corporation, is an independent oil and gas company that explores for, develops, acquires and produces crude oil, natural gas and natural gas liquids primarily in the Rocky Mountain, Permian Basin, Mid-Continent, Michigan and Gulf Coast regions of the United States. The Company's largest projects are in the Bakken and Three Forks plays in North Dakota and its Enhanced Oil Recovery fields in Oklahoma and Texas. For further information, please visit http://www.whiting.com. About Energy XXI Energy XXI (NASDAQ: EXXI) is an independent oil and natural gas exploration and production company whose growth strategy emphasizes acquisitions, enhanced by its value-added organic drilling program. The company's properties are located in the U.S. Gulf of Mexico waters and the Gulf Coast onshore. Energy XXI has implemented an "acquire and exploit" growth strategy to build a geographically focused portfolio with some of the highest per-unit margins in the industry. Energy XXI completed five major acquisitions totaling approximately $2.5 billion since its founding in October 2005. Energy XXI operates or has an interest in seven of the 11 largest oil fields in the Gulf of Mexico. For further information, please visit http://www.energyxxi.com. About Vinson & Elkins Consistently named the "World's Leading Energy Law Firm" by Euromoney's Expert Guide to the World's Leading Energy & Natural Resource Lawyers, Vinson & Elkins assists clients involved in all facets of the energy and natural resources industry. V&E can draw upon the skills and experience of more than 700 attorneys in its 16 global offices, over 400 of whom spend more than half their time on energy industry transactions. For nearly a century, V&E lawyers have represented clients on their most significant energy engagements in almost every conceivable market condition across nearly every energy producing region of the world. V&E have advised some of the largest energy companies in the world on their most important and complex business matters. In the last two years alone, V&E handled more than 1,600 energy industry transactions and proceedings for a collective value of over US$167 billion. For more information about Vinson & Elkins, please contact Mark Kelly, Chairman of the Firm, at 1.713.758.2222 or visit www.velaw.com.