The OPEC has tried (but failed) many times to price oil in anything other than dollars.
Gaddafi tried to introduce the dinar (a gold coin) as the only acceptable currency for oil (basically trading gold for oil, which is a fair deal in my opinion). America obviously didn't like it and assasinated Gaddafi.
You have to consider though that the only thing giving the dollar value right now is the fact that it's accepted as the most important global reserve currency, mostly because it's the only currency the OPEC allows. (which is not entirely by choice, as the USA kinda blackmails them with their entire army).
This is also the true reason behind almost all the wars in the middle east. (including WW1 and WW2 and the gulf wars (last one is kinda obvious), which were for a large part fought in the middle east and africa, not in europe!)
So, america
will invade any OPEC countries that will accept bitcoin as a payment method. However, China and Russia are protecting Iran, which is one of the last remaining countries left that does not sell oil solely for dollars (or attempts to). And attacking Iran will likely result in nuclear warfare, something even America does not want.
Pricing oil in bitcoin, is therefore unlikely to happen anytime soon, because they are afraid for the results. However it could happen as soon as the dollar loses the petrodollar status (which might be sooner than you think). Because once america loses the petrodollar status, there will already be a war anyway, and pricing oil in bitcoin may be the most politically neutral option. Not a single country will have the advantage america had, to print unlimited amounts of dollars and buy everything from every country with monopoly money.
Pricing oil in bitcoin will likely not be the cause of the coming wars, but it will be a logical next step once the wars are already escalating, to prevent any country to have the advantage of unlimited money printing. If any sole currency that is tied to a single country or group of countries is the only acceptable currency for oil, the issuer of that money will have practically unlimited wealth. (but will need a huge army to keep that advantage).
It will be interesting to see how 2014 will develop, but we're likely to see a lot of political tension in the OPEC countries and between China & Russia and America.
http://www.youtube.com/watch?v=HP7L8bw5QF4http://www.youtube.com/watch?v=8ZK5gRLJ9h0