Jr. Wait, GENERAL FORMULATION FOR THE ELECTROMAGNETIC RESPONSE OF A SOURCE WITHIN A CONCENTRICALLY LAYERED REGION, Radio science, 30(2), 1995, pp. 371-372
A matrix formulation is performed for a linear current-carrying source
located within a cased borehole valid for any frequency. The surround
ing formation could be any number of concentric homogeneous regions. I
t is shown that induced polarization phenomena at the casing-formation
interface can also be modeled as a limiting special case.