Reverse time migration in tilt transversely isotropic(TTI) media
Wang Juan1, Li Zhenchun1, Sun Xiao-dong1, Tao Li2
1. School of Geosciences,China University of Petroleum(East China),Qingdao,Shandong 266555,China;
2. Gudao Oil Production Plant,Shengli Oilfield Branch Company,Sinopec,Dongying,Shandong 257000,China
Abstract：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.
王娟, 李振春, 孙小东, 陶丽. TTI介质逆时偏移成像[J]. 石油地球物理勘探, 2012, 47(4): 573-577.
Wang Juan, Li Zhenchun, Sun Xiao-dong, Tao Li. Reverse time migration in tilt transversely isotropic(TTI) media. OGP, 2012, 47(4): 573-577.
