Patent ID: 6092024
Filing Date: 2000-07-18
Classification: G01V

Abstract:
A method for determining a plurality of parameters of interest of an anisotropic formation comprising:(a) conveying an electromagnetic wave propagation device in a borehole in the anisotropic formation, said device having a plurality of spaced apart receivers and transmitters;(b) inducing electromagnetic radiation in the formation by energizing at least one transmitter;(c) defining at least two parameters of interest to be determined, one of said parameters of interest to be determined being the horizontal wave number of the induced electromagnetic radiation;(d) obtaining at least three predefined measurements at said plurality of receivers;(e) defining a model that relates the at least three measurements to the at least two parameters of interest to be determined;(f) determining ambiguous values of the at least two parameters of interest by utilizing the at least three measurements and the model; and(g) determining an unambiguous value of the at least two parameters of interest from said ambiguous values.