Fresnel Zone and seismic wave field in the fracture-vug reservoir

The fracture-vug reservoir in carbonate rock may be regarded as a kind of complicated inhomogeneous medium made up of various low-speed bodies,which are random and has different size and form.In order to the predict problem, random medium model and elastic wave equations in inhomogeneous medium are used to forward modeling seismic wave-field systematically. We can find out some interesting phenomena, summarize the change characteristic of the seismic wave-field and get some meaningful conclusions from the resulted seismic wave-field Also we can make proper illustration for these phenomena and conclusions by Huygens’s principle and Fresnel Zone opinioa It is proved that the dealing methods based on the opinions of scattering (diffraction) must be strengthened to study the problem of the reservoir by cavern.