METHODS FOR EVALUATING CEMENT BONDING

摘要

Methods for evaluating cement bonding in a wellbore are provided. An example method for determining cement impedance includes generating one or more acoustic signals within a wellbore comprising a borehole fluid, a casing, and a cement layer. One or more reflections of the acoustic signals may be received from at least a portion of the wellbore, wherein each of the one or more reflections comprises an initial reflection portion and a resonance portion. At least one of the initial reflection portion and the resonance portion may be modified based, at least in part, on an attenuation response of the borehole fluid. An impedance of the cement layer may be determined by analyzing at least one of the modified initial reflection portion and the modified resonance portion.