That includes two Valero Energy VLO.N plants in Louisiana that combined process 335,000 barrels per day and Phillips 66's 255,000 bpd Alliance, Louisiana, refinery. By Liz Hampton and Erwin Seba HOUSTON, Aug 30 (Reuters) - Hurricane Ida pummeled U.S. Gulf Coast energy suppliers, knocking out most of the region's offshore wells, nearly half its motor fuel production and closing energy-export ports. Production losses - including at six Gulf Coast refineries - will lift retail gasoline prices by 5 to 10 cents a gallon, tracking firm GasBuddy said.