Multicomponent prestack reverse-time migration of elastic waves in transverse isotropic medium
横向各向同性介质弹性波多分量叠前逆时偏移

With the development of exploration in the mature exploration areas, the subtle trap is playing a dominant role. So, joint migration of multicomponent in anisotropic media is the key technology. This paper provided a full 2-D elastic prestack reverse time depth migration algorithm for common-source multicomponent data from VTI media. Extrapolation used the coupled anisotropic velocity-stress equation for variable velocity solved with a high order staggered grid finite-difference scheme in space and a second-order finite-difference scheme in time. A new imaging condition combined excitation-time imaging condition with Poynting vector was proposed to remove low-frequency artifacts. The algorithm was illustrated by application to synthetic data. The results show that this approach produces clear images and can remove low-frequency noises.