The following link is to a good presentation by the Tanzanian Energy Minister.
http://www.chathamhouse.org/sites/default/files/public/Research/Africa/260213presentation.pdf
While I imagine Swala know what sort of ground to grab it seems the Tullow farm-in to 12B in Kenya is a confirmation of 12B's prospectivity. As soon as my Otto shares go up I will get some Swala for the spec part of my portfolio.