Oil sands drive ExxonMobil's 3.3bn boe de-booking

US supermajor takes biggest hit to proved reserves in decades as Kearl project fully impaired

Writedown: ExxonMobil takes full impairment on Kearl oil sands reserves

Luke Johnson

Published 22 February 2017, 22:43Updated 20 March 2017, 15:59

North America ExxonMobil