Since 2007 exploration in Sierra Leone has focused primarily on the Upper Cretaceous slope fan play. However, there exist petroleum plays that to date are untested and could yield significant success for bold explorers.
Image: TGS full stack 2D seismic data showing an example of a perched rift basin consisting of numerous exploration targets.
A series of perched rift basins beneath the upper slope and confined by an outer high are clearly visible on TGS 2D seismic data, offshore Sierra Leone. Within these basins there are syn-rift sediments, confined to structural traps. Erosion and truncation of these sediments indicates a relative sea-level fall, thus allowing for deposition of shallower water, sand-prone sediments within these mini-basins. Examples of likely deposits include braided channels and fan systems within stratigraphic pinch-out traps. Up-dip prograding clinoforms also imply the presence of sand-prone systems in lowstand fans. The combination of both structual and stratigraphics traps, in a region of proven Albian and Turonian source rocks, provides a highly attractive exploration opportunity.
The existing high-resolution, long-offset 2D data in Sierra Leone, enables explorers to work up these untested plays and generate new exploration prospects in Sierra Leone.
The current Sierra Leone data library consists of:
Press Release: Sierra Leone announces Fourth Licensing Round
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