Correlation Between Resistivity Index, Capillary Pressure and Relative Permeability

Abstract

It is known that the three important parameters: resistivity, capillary pressure, and relative permeability, are all a function of fluid saturation in a porous medium. This implies that there may be a correlation among the three parameters. The models representing such relationships show that capillary pressure and relative permeability could be inferred from resistivity data using the analytical mathematical models derived theoretically. In fact the other two could be inferred using these models if one of the three parameters (capillary pressure, relative permeability, and resistivity) is known. Using this approach, it would be possible to quickly obtain a distribution of capillary pressure and relative permeability characteristics as a function of depth and location across an entire reservoir.