ATP Awarded Seven Gulf of Mexico Lease Blocks

ATP Oil & Gas has been awarded all seven blocks relating to its seven high bids at the March 16, 2005 Central Gulf of Mexico (GOM) Offshore Lease Sale. ATP now owns a 100% working interest and is the operator of all seven blocks at a cost of approximately $2.1 million.

Two of the blocks are adjacent to the Company's wholly-owned Mississippi Canyon 711 development. Another block is contiguous to an existing ATP operated development in the West Cameron area and the remaining four blocks provide for new development area opportunities.

Stated Gerald W. Schlief, Senior Vice President of ATP, "ATP is delighted that all seven blocks were awarded to ATP. This increases the number of Gulf of Mexico blocks that ATP has an ownership interest to 59 blocks."
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