The Chinook well has already been drilled and is awaiting ­final completion. It would be the second well tied back to the FPSO.

Petrobras plans a total of three subsea wells, two on ­Cascade and one on Chinook, to complete phase one development.

The second well on Cascade has just finished drilling and is next up for completion, according to Cesar Palagi, Walker Ridge Asset Manager for Petrobras America in Houston.

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