they different?

Abstract. Mathematical modeling of a little known model of IP referred to as “induced polarization caused by constrictiv-ity of pores ” was developed. Polarization occurs in all types of rocks if surface areas and transfer numbers are different for connected pores. The duration of the polarization process depends on two parameters: pore radii of connected capillar-ies and transfer numbers. During the polarization process all contacts between pores of different transfer numbers will be blocked and the electrical current will flow through the re-maining canals. Two phenomena control the amplitude of potential difference at time-on: 1. Successive blockage of pores increases the resistivity of sediments and results in in-creased measured potential difference. 2. Excess concentra-tion of electrolyte at the boundaries between pores with dif-ferent radii provides an additional potential. The amplitud