Mariner Announces Senior Notes Offering

Mariner Energy, Inc. plans—subject to market and other conditions--to offer $200 million aggregate principal amount of senior notes due 2017 through an underwritten public offering. The company intends to use the net proceeds from the offering to repay debt under its secured bank credit facility. Mariner cannot provide assurance regarding the amount of notes to be issued, if any, until the offering has been completed.

J.P. Morgan Securities Inc. is acting as sole book-running manager of the offering. The offering of notes will be made only by means of a prospectus, copies of which may be obtained from J.P. Morgan Securities Inc., 270 Park Ave., 8th Floor, Attention: Syndicate Desk, New York, NY 10019, 212-834-4555.

An electronic copy of the prospectus is available from the Securities and Exchange Commission's website at

Mariner Energy, Inc. is an independent oil and gas exploration, development and production company with principal operations in the Gulf of Mexico and West Texas.