The Jamnagar Refinery in Gujarat, owned by Reliance Industries, is the world's largest oil refinery. It has a processing capacity of 1.24 million barrels per day. It's followed by Paraguaná Refining Complex in Venezuela, Ulsan Refinery and Yeosu Refinery in South Korea and Ruwais Refinery in UAE. South Korea's Onsan Refinery and Dangote Refinery in Nigeria are also in list.