ATP Drills, Completes 2 High Island Wells in the GOM

On the Gulf of Mexico shelf, two wells at High Island A-589 ("HI A-589") were drilled, completed and placed on production during December 2008. The wells were completed in the 9,800' and 10,000' sands. At South Marsh Island 190 ("SMI 190"), ATP is working on final pipeline connections for one new well. First production at SMI 190 is projected in the third quarter 2009.

Connection and completion of HI A-589 and SMI 190 were delayed because of third-party pipeline outages as a result of Hurricane Ike.

ATP has a 100% WI in HI A-589, a 75% WI in SMI 190, and is operator of all three wells.