Patent ID: 6614716
Filing Date: 2003-09-02
Classification: G01V

Abstract:
A method for determining properties of an earth formation surrounding an earth borehole, comprising the steps of:(a) providing a logging device that is moveable through the borehole; (b) transmitting sonic energy into said formation, receiving, at said logging device, sonic energy that has travelled through the formation, and producing signals representative of the received sonic energy; (c) determining, from said signals, whether said formation is anisotropic; (d) determining, from said signals, whether said formation is inhomogeneous; and (e) responsive to the determinations of steps (c) and (d), outputting a characterization of said formation as one of the following types: isotropic/homogeneous, anisotropic/homogeneous, isotropic/inhomogeneous, and anisotropic/inhomogeneous.