REUTERS By Daniel Gilbert Exxon Mobil Corp.’s ambition of boosting production depends in large part on wringing more crude from the oil sands of Western Canada. One challenge: Getting that crude to market to get paid. With room on Canadian oil pipelines in short supply, and the future of the proposed Keystone XL project in doubt , Exxon is considering building a rail terminal in Edmonton, Alberta to haul crude into the U.S. on trains, a company executive said on Thursday. “We are looking at a number of logistical opportunities that we have,” David Rosenthal, Exxon’s head of investor relations, said of routes out of the oil sands, including Keystone XL. “But, as would be prudent, we are looking at other options” like the rail terminal. Some big refiners have pooh-poohed the importance of TransCanada Corp.’s Keystone XL pipeline expansion, which would carry crude to the hub of refineries […]