RE:all this talk about supply
I think the point is that all these new ways of getting oil out of the ground cost-effectively will/may keep a lid on how high prices will go in future. Even if Saudi Arabia puts the shale players out of business, what's stopping them from ramping up again if oil goes back to $50-$60? Sure bankers will not be as loose with the purse strings this go around, but shale production can start up in a hurry.
It's hard to see oil returning to $100 in the medium term. And if the world is at all serious about following up on the accord they just agreed to in France, the long term isn't looking so hot for oil, either.