what is kingfisher worth in earnings potential, page-5

1 bcf = 1.055 PJ (or roughly 1:1 as Dex said)
1 tcf = 1000 bcf
Pmean = P50 = 50% probability that there will be this much gas (i.e. 50% probability that there will be more, 50% probability that there will be less)
P10 = 10% probability that there will be this much gas (i.e. 10% probability there will be more than this and 90% probability there will be less)

Note that the P50 for all conventional resources is 1.375 OGIP (original gas in place), which is not the same as recoverable gas. Still, it is a massive potential resource even if some of it is tight gas.