UPDATE 1-ConocoPhillips revises down over 1 bln bbls of oil sands reserves
February 21, 2017 at 18:22 PM EST
CALGARY, Alberta, Feb 21 (Reuters) - ConocoPhillips Corp has revised down over a billion barrels of oil sands reserves because of low global crude prices, a company filing showed on Tuesday, the latest sign that some of Canada's vast hydrocarbon potential may be left untapped.