Ogunleye Segun Oyewole
University of Ile – Ife
Title: Palynofacies and Palynostratigraphy Analysis of x and y wells, shallow offshore, Niger delta basin, Nigeria.
Biography
Biography: Ogunleye Segun Oyewole
Abstract
A detailed palynofacies and palynostratigraphy studies were carried out on ditch cuttings from Well X and Well Y, shallow offshore, Niger Delta. The samples yielded a number of species of palynomorphs, which includes Zonocostites ramonae, Monoporites annulatus, Retitricolporites irregularis, Cyperaceapollis species, Echitricolporites spinusos and Nympheapollis clarus. One floral zone (P800) and three (3) subzones (P860, P850 – P840 and P830) were delineated in both wells based on the recognition of the base continuous occurrence of Nympheaepollis clarus and the quantitative base occurrence of Cyperaceaepollis sp. These bioevents as well as the associated palynomorph assemblage indicates a Late Miocene age for the analyzed section of both wells. The relative abundance of the sedimentary organic matter (Amorphous, Phytoclasts and Palynomorphs) revealed three palynofacies types pointing to three possible paleoenvironments. These are the proximal, marginal and distal shelf environments which are laid down under anoxic, suboxic and oxic condition. On this basis a coastal to marginal marine environment was proposed for the sequence penetrated by the two wells.