Workers on Petrobras Brazil oil plaforms strike

SAO PAULO, July 14 (Reuters) - Brazilian oil workers at national energy giant Petrobras (PETR4.SA) (PBR.N) began a planned five-day strike at the country's main fields in the Campos basin at midnight on Sunday, a union official said.

Campos accounts for more than 80 percent of Brazil's crude output of 1.8 million barrels per day. Worries over the strike helped push up world oil prices last week, which reached a new record on Friday above $147.

(Reporting by Peter Murphy; Editing by Ben Tan)