Exxon facing biggest reserves reduction over oil price fall
Exxon Mobil has warned that it may face the biggest-ever reserves revision as production sank to a seven-year low and profit slid amid a prolonged slump in energy markets. About 3.6 billion barrels of reserves in Canada and another 1 billion barrels of oil equivalent in other North American fields may be in jeopardy if current prices persist, Exxon said.