I'll add three points if I may
(i) the reserves as of 2012 before the announcement of the major Brazilian finds that would catapult them up the list, also pre-microwave technology
(ii) I have been hearing this 'we are running out' argument from the day I joined.....back in 1980, it was the late 1990s, by 1990 it was now and look where we stand today......
(iii) Hopefully, the reserve and technology situation bridges us over to the hydrogen economy or solar one, breakthrough 'wild-cards' needed to make it all plausible, in H2's sake, the storage issue and, for solar, it's efficiency and distribution costs.....tidal is an offering. I have long argued on public platforms that, until then, we will see a myriad of solutions across the globe partly dictated by local economics, hence biofuels, solar, tide, nuclear, algae, wind all co-existing..... and electricity cars? - well they should be scrapped as everybody 'forgets' the environmental economics of making and distributing the tricity.