Finally world growth has caught up with oil supply. China and India are not going away. As they increase their demand for a share of the oil, where is it coming from?
One point that we don't hear much of in talk about an oil shortage is: At $20, billions of barrels may not be economic. But that must change at $30, $40, $50 etc...
However at present it appears that oil production is at or very close to maximum capacity and it is all needed to satisfy demand.