BHP Makes Discovery at Cascade Prospect

BHP Billiton has completed drilling of an ultra-deepwater exploratory well on its Cascade prospect in the Gulf of Mexico. The well, Cascade-1, encountered an encouraging hydrocarbon column.

Drilling on Cascade-1 began January 31 2002, in Walker Ridge Block 206 using the drill ship C.R. Luigs. Whole cores were taken in the well, which was drilled in waters approximately 8,200 feet deep to a total depth of 27,929 feet (from the deck of the drill ship).

The significance of the well will be assessed following further evaluation of drilling and resource data. Further drilling will be necessary to determine the size of the find.

BHP Billiton owns a 50 percent interest and is the operator of Cascade, with Petrobras and Devon Energy Corporation each holding a 25 percent interest.

The Cascade prospect lies approximately 35 miles south-southwest of the Mad Dog and Atlantis oil and gas discoveries where earlier this year BHP Billiton approved funding to advance these fields into development and production.


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