 BP's share was $66 million since it would pay the award and then be reimbursed by partners, including Exxon Mobil Corp and ConocoPhillips, based on their proportionate share of ownership.The Prudhoe Bay oil field is located on Alaska's North Slope and lies between the National Petroleum Reserve–Alaska to the west and the Arctic National Wildlife Refuge to the east.It is home to thousands of migratory birds, caribou, and other creatures.