Ok, but we aren't currently in that process. The potential oil production capacity of the world has massively increased, because of fracking. And if oil price

Ok, but we aren't currently in that process. The potential oil production capacity of the world has massively increased, because of fracking. And if oil prices go up, a whole lot of oil in the US and Canada , become immediately profitable to extract. I think you are severely underestimating how much non conventional oil there is, that we could start extracting, if it became profitable.