http://business.financialpost.com/2013/08/19/oil-sands-crude-not-as-expensive-to-produce-as-it-used-to-be/
The report pegs supply costs for (Alberta) oil sands projects in the range of US$50 to US$90 per barrel. That compares to the US$70 to US$90 a barrel needed to blast light, sweet crude through underground fissures in North Dakota’s Bakken shale, the Eagle Ford play in Texas and Colorado’s Niobrara shale, the bank (BMO) said.
при 50-60 за бочку, с дискаунтом 20-40 канадская нефть уже будет глубоко "под водой".