DETERMINATION OF THE RELATIONSHIP BETWEEN POROSITY AND PERMEABILITY USING SUITE OF CORE SAMPLES, IN NORTH-EASTERN NIGER DELTA, NIGERIA

Abstract

This study is aimed at determining the relationship between porosity and permeability using suite of core samples. Porosity and permeability values of a suite of core samples obtained at different depths from three different producing wells in North-Eastern Niger Delta, Nigeria were determined using routine core analysis. Only dry and clean core plugs were used for the measurement. This analysis entails the use of fluid saturation techniques for the determination of porosity values and passing fluid (synthetic oil) of known viscosity at a certain rate through the cores, measuring the resulting pressure drop across the cores for the determination of permeability. Each suite is comprised of 30 core samples and is represented by plots of permeability versus porosity and a written summary. Producing wells Apani-01 and Apani-03 showed a better relationship between porosity and permeability of the core samples compared to producing well Apani-02. Producing well Apani-01 has its highest porosity and permeability values (20.8% and 1393.6mD respectively) at the depth of 9756.64ft, while producing well Apani-03 has its highest porosity and permeability values (23.3% and 336mD respectively) at the depth of 8355.36ft. Producing well Apani-02 which showed a poor relationship has its highest porosity and permeability values (21.4% and 882.0mD) at the depth of 10087.34ft. The results of this study can be applied in exploration and production of hydrocarbon to identify potential and/or productive wells.