Determining properties of earth formations using dielectric permittivity and conductivity measurements

摘要

Methods for determining formation properties comprise deriving from measurements of electromagnetic energy in the formations, at a plurality of frequencies, a respective plurality of formation permittivities and a respective plurality of formation conductivities. Determined properties include the cementation and the saturation exponents of the formation, and the radial profile of vertical and horizontal permittivity and/or conductivity. A mixing law permittivity as volumetric fractions of the formation matrix, water and hydrocarbon permittivities may be derived and processed with the derived formation permittivities and conductivities to determine the effective permittivity and the rock type of the formation.