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Cascade was discovered in 2002 and Chinook in 2003. The discoveries, among others, defined a new hydrocarbon trend in the Gulf of Mexico ultra-deep water. The hydrocarbon bearing sandstones are equivalent to the Wilcox Group (Eocene-Paleocene), a prolific producing sediment onshore Gulf of Mexico. Cascade is located about 160 miles south of the Louisiana coast in 8,200 ft water depth and Chinook is about 15 miles south of Cascade in 8,700 ft water depth. Wells will be drilled to a total depth of approximately 27,000 ft. 

The Cascade field is owned by Petrobras America Inc. (50%) and Devon Energy Production Company, L.P. (50%), while the Chinook field is owned by Petrobras America Inc. 66.67% and TOTAL E&P USA, INC. (33.33%). Petrobras operates both fields. 

Phase 1 will consist of two subsea wells in Cascade and one subsea well in Chinook tied back to a disconnectable turret moored FPSO, with first production estimated for mid 2010. Oil (18^o to 27^o API) will be transported from the field in shuttle vessels to terminals of opportunity along the Gulf coast from Texas to Mississippi and gas will be exported through a gas export pipeline. The minimum amount of infrastructure will be installed in Phase 1; however, the development concept is very flexible and enables multiple development scenarios in future phases and up to 80,000 bopd of production. 

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