Palynofacies And Paleoenvironmental Studies of TDA-1 Well, Niger Delta Basin, Nigeria

Isaac Oluwafemi Okediji

The palynofacies and paleoenvironmental study of TDA-1 well, Niger Delta Basin, Nigeria between intervals of 6160 to 14470 feet (1878 to 4410 meter). The Niger Delta Basin is a crucial geological formation that has significant hydrocarbon reserves and supports diverse ecosystems where three main formations in ascending order are formed including the Paleocene Akata Formation, Eocene Agbada Formation, and Oligocene Benin Formation. Palynological analysis was carried out on the ditch cutting samples obtained from TDA- well of the Niger Delta Basin which was done through maceration (removal of silicate mineral and carbonate), neutralization which involves addition of Potassium Hydroxide (KOH) and distilled water. Then, microscopic analysis for identification of palynofacies. Certain palynomorphs (Spores: Laevigatosporites sp., Verrucatosporites sp., Polypodiaceoisporites sp., and Acrostichum aureum; Pollen: Striatricolporites catatumbus, Psilatricolporites sp., Monocolpites sp. etc.). The palynomacerals types PM-1, PM-2, PM-3, PM-4 identified and percentage of different paleoecological groupings and taxa (freshwater, rainforest, mangrove, savannah and montane) of dominant palynomorphs are were used to determine the paleoenvironment of deposition. The dominant paleoenvironments are freshwater and mangrove. The paleoenvironment of deposition was inferred to be Coastal brackish water environment.