The acreage is located at the convergence of the Mandera-Lugh, Mochesa and the most southeasterly extent of the Anza basin, which is at the eastern termination of the prolific oil-prone Central African Rift System. The western portion of Block 2B, where exploration has been focused to date, lies within the Anza Basin. The Badada-1 well proved over 3,000 metres of Tertiary section and it is possible that the Tertiary is in excess of 5,000 metres in thickness in the deepest part of the basin. The sequence in Badada-1 comprised a series of good-quality potential reservoirs associated with potential sealing units, but the well failed to encounter any hydrocarbon-bearing zones. The only other well in the block, Hothori-1, drilled in 1989, encountered oil and gas shows in the Tertiary and penetrated an Eocene-age potential lacustrine source rock which is likely to thicken into the Tertiary depocentre, but was not penetrated by Badada-1. The success of several wells in the adjacent Block 9, where the Sala-1 well flowed gas at 6 MMscfd, has confirmed the existence of a working hydrocarbon system in the Anza Basin. The existence of a deeper closure, beneath the total depth of Badada-1, is recognised, as are a number of other structural leads capable of development into drilling targets.