The frequency-space domain prestack depth migration with arbitrarily wide-angle wave equation
Sun Qi-feng1,2, Du Qi-zhen2
1. College of Computer and Communication Engineering, China University of Petroleum(East China), Qingdao, Shandong 266555, China;
2. College of Geo-resources and Information, China University of Petroleum(East China), Qingdao, Shandong 266555, China
Abstract：Prestack depth migration methods based on wave equation are effective tools for imaging in media of strong laterally varying velocity.On the basis of the arbitrarily wide-angle wave equations(AWWEs),we propose a new migration method implemented with finite difference high-split scheme in frequency-space domain.The test of impulse response clears that the low order AWWEs can be adapted to steep dips by optimization of the parameters.The results of prestack migration of Marmousi dataset show that the method can handle strong lateral variation and steep dip.Compared with the AWWEs scheme in the time-space domain,the proposed scheme has some advantages in computational efficiency.
