Oil and gas are cheap and plentiful now, but what about 5 years from now? 10 years from now?

As far as fishing goes, any fisherman will tell you that the best place to fish offshore is near a rig, as the substructure provides a great place for fish to hang out. I can't argue with the 'despoiling the view' argument, though, and the Deepwater Horizon disaster did make clear that accidents can happen, so there's that. Still, I don't like taking a tool out of the toolbox. What if, 5 years from now, we really NEED whatever oil is there, offshore in those states, and we can't get to it?

Oil and gas are cheap and plentiful now, but what about 5 years from now? 10 years from now?