Mariner Energy, Inc.
580 Westlake Park Boulevard Suite 1300 Houston, TX 77079 United States www.mariner-energy.com	Contact:	Investor Relations 281-584-5540 (Ph.) 281-584-5555 (Fax)

Our increasing focus on Gulf water depths greater than 600 feet, or the deepwater, since the early 1990s has made us one of the most experienced independent operators in the deepwater Gulf. We have been an active explorer in the Gulf Coast area since the mid-1980s, when we operated as Hardy Oil & Gas USA Inc., and have increased our production and reserve base through the exploitation and development of internally generated prospects, which we refer to as growth "through the drillbit". Members of our senior management team, most of whom have worked together for over 15 years, and an affiliate of Enron North America Corp. led a buyout of Mariner from Hardy Oil & Gas plc in April 1996. We believe that our operating experience, exploration expertise, extensive deepwater lease inventory and seasoned management team give us a unique competitive advantage with substantial growth potential.

Primary Line of Business: Oil & Gas Exploration Ownership: Private

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