Effect of pore framework and radius of pore throats on permeability estimation

摘要

The purpose of this study is to understand and develop a model pore geometry, petrophysical parameters of (porosity, pore throat radius and permeability), and reservoir performance characteristics. Number of both sandstone and limestone samples extracted from different oil fields in Egypt and Arabian Gulf were conducted for petrophysical study. This study used the pore throat size distribution derived from capillary pressure by mercury injection (MICP) to determine the pore throat parameter for all the studied samples, r(35) and the amount of micro-porosity in the studied samples. The pore throat and micro-porosity cut-off were determined graphically from the two curves of cumulative flow capacity and storage capacity.