Crude prices rose slightly today on news that the launch of British energy giant BP's facilities in the Gulf of Mexico may be delayed.New York's main contract, light sweet crude for delivery in October, climbed five cents to 63.85 dollars per barrel in electronic deals before the official opening of the US market. It had fallen to 62.03 dollar last Friday - the lowest point since March 22.In London, Brent North Sea crude for November delivery gained 15 cents to 64.20 dollars per barrel in electronic trading today.