Patent ID: 6176344
Filing Date: 2001-01-23
Classification: G01V

Abstract:
A method of determining an azimuth position of a subterranean reflecting surface of a formation bed outside a borehole, which comprises:generating a monopole acoustic waveform for transmission into said formation bed to produce a reflection waveform;receiving said reflection waveform with both a monopole receiver and a dipole receiver in a borehole tool;adding a monopole response of said monopole receiver to said reflection waveform and a dipole response of said dipole receiver to said reflection waveform to generate a monopole beam pattern signal;subtracting said dipole response from said monopole response to generate a dipole beam pattern signal; anddetecting a phase difference between said monopole beam pattern signal and said dipole beam pattern signal to provide an indication of said azimuth position of said subterranean reflecting surface.