In June, 2011, ExxonMobil announced two major oil and gas discoveries in Keathley Canyon blocks 918, 919, and 964 (Hadrian field) southwest of New Orleans, with combined estimated reserves of . The find was "the company’s first deepwater exploration well following a U.S. moratorium" after the Deepwater Horizon explosion and oil spill in the Gulf in 2010 and "one of the largest discoveries in the Gulf ... in the last decade." "Exxon holds a 50% working interest in four ... blocks. Units owned by Petrobras and Eni SPA hold a 25% interest in three of the blocks. Petrobras also owns 50% of one of the blocks."