CEMENT BOND ANALYSIS

摘要

A method and apparatus for evaluating a bond between a formation and a tu bular. The method includes emitting a shear wave into the tubular, recording the response of the shear wave, and evaluating the response to obtain bond information. The bond information includes bond material (cement) thickness and efficacy of the bond between cement and formation. The method includes s tudying and utilizing the time lag of the direct wave and wave events, as we ll as the interference of these waves on a spectral graph. A calibration met hod is included as well.