Phase-shift migration of prestack elastic wave data.
Yao Dezhong Zhou Xixiang1
chengdu University of Electronic Science and Technology,No.5 The Second Section of North Jianshe Road,Chengdu City,Sichuan Province,Internal Postcode:610054
Abstract：Elastic wave image remains in research stage.Phase-shift migration of elastic wave data is based on phase-shift migration of acoustic wave data.First,phase-shift migration formula based on displacement field is derived from elastic wave equation of single component in displacement field.Then,phase-shift migration of prestack elastic wave data in displacement field is achieved with the aid of seperating com- pressional wave from shear wave in time-space domain. Crosscorrelation imaging is compared with time imaging.The comparison shows that time imaging is more efficient than crosscorrelation imaging,with their results equivalent.
