Shale is not economically viable, regular oil is profitable at 10 dollars a barrel, shale needs 60 dollars or more. That is an extreme difference that we are not feeling because of massive amounts of credit pumped into the shale boom. Once the fake money dries up and the market prices that shale oil at its correct value you are in for a world of pain. Imagine the gas a the pump station going x6 and that affecting the rest of the economy. That is a world based on shale instead of conventional oil.