Palynofacies, Organic Thermal Maturation and Source Rock Evaluation of Nanka and Ogwashi Formations in Updip Niger Delta Basin, Southeastern Nigeria

The oil and gas prospects in the Nigerian inland basins necessitated the palynofacies characterization, thermal maturation and source rock evaluation of the Nanka and Ogwashi formations of the Niger delta basin. The Nanka Formation has dominant terrestrial microflora, brown structured phytoclasts and amorphous organic matter, opaque debris accompanied by dinoflagellate cysts. The Ogwashi Formation has maximum terrestrial microflora, medium to large brown structured phytoclasts, opaque debris with abundance of dark brown amorphous organic matter and a few marine taxa.