File photo shows Petrobas oil company’s offshore platform P-52 in an aerial view in Campos basin near Rio de Janeiro

Petrobas oil company's offshore platform P-52 is seen in an aerial view in Campos basin near Rio de Janeiro in this November 28, 2007 file photo. Brazil energy giant Petrobras said on Monday that a strike started by its oil workers at midnight on Sunday will cut its production by 300,000 barrels per day. The Campos basin affected by the planned 5-day strike accounts for more than 80 percent of Brazil's crude output of 1.8 million barrels per day. REUTERS/Bruno Domingos/Files (BRAZIL)