this well is equal to 1 billion barrels to meo, page-3

The one thing that has me sold and without taxing my noggin with math is the proximity to the mighty Perseus gasfield.
That has 12tcf...MEO is 18tcg!

This from MEO website:

MEO has carefully reviewed the existing 2D and 3D data, which covers most of the permit areas. The most significant potential lies in WA-361-P, immediately northeast of the Perseus Gas Field and on the northern flank of the Goodwyn Gasfield where a thick sequence of interpreted Legendre shoreface and shallow marine sandstones is present in the Keast Graben. A potential stratigraphic trap, Zeus, has been identified, which is a similar play and analogous to the Perseus Gas Field (12 Tcf) and the new Woodside Persephone-1 discovery on the eastern flank of the North Rankin Gasfield.