Method and apparatus for evaluating stoneley waves, and for determining formation parameters in response thereto

摘要

A subsurface formation may be evaluated through use of data obtained from Stoneley wave propagation in the fluid column within the borehole. Either wave amplitude or phase velocity may be utilized to determine composite lithology parameters. These composite lithology parameters reflect fluid and/or formation characteristics, and functionally relate such characteristics in a manner as to facilitate the determination of formation permeability in a well logging environment.