CNBC | Exxon revises down oil and gas reserves by 3.3 billion barrels CNBC U.S. oil major Exxon Mobil Corp has revised down its proved crude reserves by 3.3 billion barrels of oil equivalent as a result of low oil prices throughout 2016, a company filing showed on Wednesday. The de-booking includes the entire 3.5 billion ... Oil Sands Batter Major Explorers' Reserves as Rout Sinks Value ExxonMobil forced to make cuts to reported oil and gas reserves Exxon has wiped a whopping 19.3% of its oil reserves off its books |