Libya is restricted, they are fools who could be rich but prefer to fight and be poor apparently. They are destroying assets, even in Syria the rebels do not blow up refineries and wells but just aim to capture it intact. Amazing for terrorists basically, the head men respect money and its power more then people
Another factor Ive read of is China building up massive reserves. As they receive so many dollars, this store could be considered superior to the alternatives they have while suppressing their own exchange rate worth.
Im not sure how long the Chinese can keep on importing oil with an economy not growing as fast as it used to, maybe they will find some kind of use for it in an exportable good. If they do cease all extra buying this will destabilize the balance back to supply excess leading to lower prices presumably