Four offshore oil exploration areas owned jointly by Brazilian state-run oil company Petroleo Brasileiro, Royal Dutch/Shell Group and Exxon Mobil Corp. are commercially viable, Shell's Brazilian unit said in a statement.
The areas are within an offshore block 74 miles off the coast of Brazil's southeastern state of Espirito Santo. Shell and Petrobras each have a 35% stake in the block, and Exxon Mobil has 30%.
