摘要
Based on Alkhalifah’s P-SV dispersion relation in VTI media,we apply in this paper pseudo-acoustic approximate to derive the acoustic scalar equations in transversely isotropic(TI) media.Each of these equations is second-order derivative in time and space with no mixing of time and space derivatives,which makes it easier and more efficient to realize finite difference method numerical simulation.Using improved incomplete pseudo-acoustic approximate,we obtain a longer stability simulation time.Wavefield simulation process is more stable compared with the conventional pseudo-acoustic approximation method.Both the finite difference numerical simulation and the complex model test show that the derived pseudo-acoustic scalar equations could accurately describe kinema-tics characteristic of P wave in TI medium,which facilitate efficient anisotropic RTM.