PETROBRAS SEES RAISING EXPORT OF FUEL IN 1987 Brazil's state oil company Petrobras is pledging to export 4.6 mln cubic meters of fuel, or 28.9 mln barrels in 1987, a company spokesman said. He said that represents a total sale worth 600 mln dlrs. The volume is 27 pct higher over 1986 sales, which totalled 3.6 mln cubic meters, or 22.6 mln barrels. The United States, Africa and Latin American are Brazil's main fuel buyers, the spokesman said.