Oil in ground may be worth less, Exxon concedes, unhappily

As low oil prices remain steady, many oil companies have been forced to write down the value of their reserves. It’s something oil giant ExxonMobil has resisted, even as its revenues have dropped. But the company is now expected to reassess the value of 3.6 billion barrels of oil-sand reserves, and 1 billion barrels of other North American oil… …read more