There are many potential sources of oil in the basin. Nobody has ever drilled past 1600' (approx.) in Tasmania. Like a virgin. How do you know what could possibly fuel Bellvue? For that matter, I believe according to hypotheticals a thin structure of the same Tasmanite shale as the retorted shale from Latrobe lies below Bellvue
Gosh, I guess the hundreds of millions of prospective barrels of oil doesn't include the Tazmanite shale in payzone #4 Did you forget? So, there is more oil now?
The Tasmanite oil shale near Latrobe was known and mined a century ago. Boss Resources has extended the known deposit with its drilling. The oil shale bed is present widely through the Tasmania Basin.
And talk about funny, I find it very interesting that the same major sourcerock found through-out the rest of the world in proven oil finds are called tasmanites. A term the whole world uses: