Resonance method for measuring water-oil ratio, conductivity, porosity, permeability and electrokinetic constant in porous formations

摘要

A shear wave is generated at a borehole wall. A static magnetic field is applied with a radial direction and an oscillating magnetic field is applied tangential to the borehole wall. The frequency of the oscillating field is varied until a resonance condition occurs. Motion of the formation under resonance provides an indication of a resistivity property of the earth formation.