RIYADH: The profit margin of Bahraini oil refineries has risen to its highest historical level in the industry, the country"s minister of oil and gas said in an interview with Asharq. Mohammed bin Khalifa bin Ahmed Al-Khalifa also added that Bahrain Petroleum Co. refinery’s expansion is over 80 percent complete. Expansion of the main oil refinery is in progress which will raise the total capacity to around 400,000 barrels per day, he added. The Bahrain Petroleum Co. refinery expansion project will raise the current production capacity from 267,000 barrels to 360,000 barrels per day, according to Asharq. Bahrain has more than 30 trillion cubic feet of gas reserves, and imports about 80 percent of its crude oil from Saudi Arabia.