METHOD AND APPARATUS FOR ESTIMATING FORMATION PERMEABILITY AND ELECTROACOUSTIC CONSTANT OF AN ELECTROLYTE-SATURATED MULTI-LAYERED ROCK TAKING INTO ACCOUNT OSMOSIS

摘要

An acoustic source on a logging tool is used to generate acoustic waves in a borehole. Acoustic detectors on the logging tool measure the generated acoustic waves. Electrodes on the logging tool are used to measure the potential resulting from the generated acoustic wave. The output of the hydrophones and the electrodes corresponding to Stoneley wave components of the acoustic wave are processed to provide an estimate of formation permeability, acoustoelectric constant, and a velocity of a propagating second compressional wave in the formation.