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The Upper Cretaceous strata in the southeastern Nigerian sedimentary basins are being investigated as prospective targets for stratigraphic and structural traps for possible petroleum development. This consideration has arisen due to the urgent need to increase petroleum reserves to meet increasing demands in Nigeria. The spatial differentiation of the various lithostratigraphic units in the sedimentary basins has not been substantially achieved, but somewhat tricky as a result of widely spaced outcrop and insufficient subcrop data (Nwajide and Reijers, 1996; Obaje et al., 2004; Onyekuru and Iwuagwu, 2010). Several works have predicted the existence of oil and gas in the Campanian to Maastrichtian strata of the Anambra and Afikpo Basins. The basins are, however, still considered frontier basins due to the challenges associated with the interpretation of stratigraphy and structure arising from non-availability of subsurface data.

Characterization of Upper Cretaceous Sediments in Parts of Afikpo Area, Afikpo Syncline, Southeastern Nigeria