Revista de Ciências Químicas

Evaluating Some Aspects of Gas Geochemistry of some North Sea Oil Fields

Abstract

Chukwudi Nwaogu, Selegha Abrakasa, Hycienth Nwankwoala, Mmaduabuchi Uzoegbu and John Nwogu

Gas geochemistry, an integral part of petroleum geosciences, has been used for evaluating source rocks potential for shale gas and in conventional exploration as a guide for determining potential productive formations. However, in contemporary times, new concepts of gas geochemistry have been applied in delineating the effectiveness of caprocks. Caprock is a vital element of a petroleum system, the volumes of rocks overlaying reservoirs are responsible for the configuration on which the accumulation sits and fosters essential preservation. In this study headspace gas served the purpose of delineating leakage and determining migration pathways, mechanism and discriminating gas types in the formations overlaying the reservoirs.