Chevron won the bidding rights to drill for oil in the Frade field in the Campos Basin and contracted Transocean for drilling purposes.

FORBES: Transocean Faces Possible Lawsuit After Brazil Oil Spill

Chevron was partnering with Brazilian oil company Petrobras to drill for hydrocarbons at the Frade Field in the Santos Basin in the Atlantic when the Nov. spill occurred.

FORBES: Chevron Not Leaving Brazil

Chevron had been banned from producing in the Frade field, and in Brazil in general, after more than 100, 000 gallons of crude flowed into the Atlantic Ocean two Novemebers ago.

FORBES: Chevron's Production And Refining Down While Brazil Authorizes Ultra-Deepwater Drilling Again