It's been well documented for decades that there's oil under various parts of Australia. Most of the natural gas we currently extract is sitting on top of some form of oil.
The issue at the moment as I understand is that the oil is currently too difficult to extract for it to be economically viable to extract it, so for the moment it stays were it is.
There's still lots of oil under Texas, but for the last few decades it's been easier to get the oil from the Middle East. There's been a few comentries in the last year that the US will be almost completely self sufficient on oil within a decade, because they're again approaching the point where it's cheaper to get the local stuff as Middle East oil starts to run dry.
The issue at the moment as I understand is that the oil is currently too difficult to extract for it to be economically viable to extract it, so for the moment it stays were it is.
There's still lots of oil under Texas, but for the last few decades it's been easier to get the oil from the Middle East. There's been a few comentries in the last year that the US will be almost completely self sufficient on oil within a decade, because they're again approaching the point where it's cheaper to get the local stuff as Middle East oil starts to run dry.