The invention relates to a full-band elastic wave dispersion attenuation
analysis method for a cross-shaped multi-scale flow pore medium. The method comprises the following steps: 1, enabling an actual complex pore medium to be equivalent to a cross-shaped pore model; 2, calculating related elasticity and fluid parameters such as
solid phase, flow phase and
solid-flow
coupling according to the full-band
elastic wave propagation theory of the cross-shaped multi-scale flow pore medium; 3, solving a
plane wave solution according to the full-band
elastic wave propagation wave equation of the cross-shaped multi-scale flow pore medium, and generating phase velocities and quality factors of longitudinal
waves and transverse
waves; and 4, generating a relationship among the elastic
wave speed, attenuation and frequency according to the phase speed of the elastic wave and the quality factor. The method can be used for analyzing the change rule of elastic
wave frequency dispersion and attenuation in the multiphase pore medium along with frequency,
porosity, permeability and the like, and serves for oil and gas reservoir detection and
seabed sediment elastic
wave detection.