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Tight oil, the new oil source unlocked by new drilling technologies, is bearing such good results it could quickly compete with Canada’s oil sands as a top secure supply of North American oil.

With companies like Devon Energy Corp., Talisman Energy Inc., Encana Corp., Exxon Mobil Corp. pushing big spending toward tight oil, analysts are ratcheting up their production forecasts for the supplies, which are largely based in the United States.

“Tight oil is changing the landscape in North America,” Steve Fekete, managing consultant at Purvin & Gertz, said at an oil sands industry conference in Calgary this week.

The international energy consultancy predicts production of tight oil in the United States alone could reach between 1.4 million barrels a day and 2.4 million b/d by 2020 – from about 600,000 b/d today derived in large part from the Bakken field in North Dakota.......