[wutbrodo]

Supply and demand don't only flow in one direction. Oil demand is absolutely responsive to price (and thus supply), in the form of energy users turning to alternative sources of energy, focusing more on energy efficient machinery, using less energy (driving less when the cost of driving rises).

[ars]

You are assuming no one else would sell them oil. This is incorrect.

The is currently enough oil supply for everyone. Reducing/removing an oil source just means the oil comes from somewhere else, but it does NOT reduce oil consumption.

[wutbrodo]

No, I'm not. But I am assuming that access to the source we're talking about would have an appreciable effect on global supply. This isn't the first time this has happened: the plummet in oil prices in the last few years is in large part attributed to an increase in supply of US oil production. I don't remember the details off the top of my head but I recall reading that the drop in prices has also been accompanied by a halting of the momentum of consumer interest in things like fuel efficiency.