The Cretaceous Play of Tano Basin, Ghana
Joel Teye Tetteh

Abstract
The cretaceous play of Tano basin which is located southeastern part of Ghana begun its tectonic activities in the last Jurassic era where there was a continental rifting between African plate and the South American plate. This lead to the creation of the West African Transform Margin. Tano Basin which is part of this margin and bounded on both sides by Romanche and St Paul fault became a depositional focus during the Cretaceous era with mostly fluvial and lacustrine clastic sediments. Three major play exist in the Tano basin which include: Albian Play, Cenomanian Play and the Turonian play with the Turonian play being the most productive. Source rocks in the basin are mainly of kerogen type II and type III. The field thus, produces oil, gas or oil condensate. Structural and Stratigraphic traps are both existent in the basin some types of traps being pinch out trap, salt domes, anticlines and faults. Porosity and permeability values in the basin is quiet high ranging from 17-23% of porosity and permeability values of up 3000mD. In all, the good overburden, the anoxic conditions in the basin, the deposition of the marine shale, the high porosity and permeability and the good trapping mechanism in the Tano Basin has rendered it very productive and a big player in hydrocarbon production in Africa.

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