Reuters: Pilot projects in an as-yet undeveloped oilfield could remake Canada's energy map, if producers can successfully wrest a sludgy, tarry substance called bitumen from porous rock in remote northern Alberta.
The bitumen in the caverns and cracks of the dolomite and limestone rock is a vast resource, estimated by Alberta regulators to hold close to 500 billion barrels of oil, or more than the combined recoverable oil reserves of Saudi Arabia and Venezuela, the world's top two oil states.
The bitumen,...