(Reuters) - Chevron Corp CVX.N has completed the evacuation of personnel from all its platforms in the U.S.-regulated northern Gulf of Mexico and shut in the facilities because of Hurricane Delta, the company said on Wednesday. About 80%, or 1.49 million barrels per day (bpd), of offshore crude oil production and about 49% of natural gas output were shut in the U.S. Gulf, the U.S. Bureau of Safety and Environmental Enforcement said.