ATP to Discuss Updated Reserves at The 2008 Oil & Gas Conference

ATP Oil & Gas Corporation (NASDAQ:ATPG) Chief Executive Officer T. Paul Bulmahn and President Leland E. Tate will update reserve estimates at The 2008 Oil & Gas Conference hosted by EnerCom in Denver. The live presentation beginning at 10:30 am MT (12:30 pm ET) will be broadcast on Wednesday, August 13th on ATP’s website at www.atpog.com and http://www.investorcalendar.com/CEPage.asp?ID=132205. The presentation handouts will be posted for viewing beginning today at www.atpog.com. Also representing ATP at the conference are Chief Financial Officer Albert L. Reese, Jr., Vice President of Finance Brian C. Nelson and Gerald W. Schlief, Acquisitions and Divestitures. One-on-one meeting requests can be made directly to management at the conference site or to sthornton@atpog.com.

About ATP Oil & Gas Corporation

ATP Oil & Gas is an international offshore oil and gas development and production company with operations in the Gulf of Mexico and the North Sea. The company trades publicly as ATPG on the NASDAQ Global Select Market. For more information about ATP Oil & Gas Corporation, visit www.atpog.com.