Geochemical Data Characterization and Spatialization for Petroleum System Analysis-An Example from Offshore North Gabon Basin, Africa

Summary Spatialization of multiple geochemical variables is a strong and well-established method to investigate, analyze variations of source potential, hydrocarbon fluid types, and source organofacies through time and space in a petroleum system. In our findings, the Post Salt Petroleum System of offshore North Gabon Basin of Africa is characterized by 4 key source-stratigraphic intervals: Albian, Ceno-Turonian and Coniacian-Santonian and Upper Cretaceous that can be correlated with OAE. Two dominant fluid families associated with organofacies classes B and C (Pepper & Corvi, 1998) were identified from multiple key biomarker ratios and cross plots along with tricyclics and hopane profiles within post salt reservoir system. The work summarily helps to recognize and focus on the desired play and petroleum system elements for further opportunity evaluation and petroleum system modelling.