Just one thought, and it has nothing to do with aviation.
Deep water oil off Falklands would be at the absolute screaming edge of technology to profitably extract and take to market. Therefore, it will need access to that technology and an acceptance that it will always be expensive to work. If it comes in it will probably be marginal, high cost oil. Which is why the major oil companies are not there in force.
Not exactly Saudi is it...
This whole Falklands oil thing to me is a bad case of two bald men fighting over a comb.