TY - JOUR
T1 - 3D Prestack Depth Migration with Factorization Four-Way Splitting Scheme
AU - W. Zhang & G. Zhang
JO - International Journal of Numerical Analysis and Modeling
VL - 0
SP - 183
EP - 196
PY - 2005
DA - 2005/11
SN - 2
DO - http://doi.org/
UR - https://global-sci.org/intro/article_detail/ijnam/961.html
KW - 
AB - <p style="text-align: justify;">3D prestack depth migration is an important and commonly
used way to obtain the images of complex structures in seismic data processing. In this paper, 3D prestack depth migration with hybrid
four-way splitting scheme is investigated. Wavefield extrapolation is
based on the 3D acoustic one-way. The hybrid four-way splitting
algorithm based on factorization is derived. Numerical calculations of
3D post-stack depth migration for an impulse and 3D prestack depth
migration for SEC/EAEG benchmark model are implemented. The result of 3D
post-stack depth migration show that the numerical anisotropic errors
can be reduced effectively and the errors are small when the lateral
velocity variations is small. Moreover, the 3D prestack depth migration
for SEC/EAEG model both with two-way and four-way hybrid splitting
scheme can yield its good images. The Message Passing Interface (MPI)
programme is adopted on PC cluster as the large scale computation of 3D
prestack depth migration. The parallel efficiency is high because of
high parallel feature of 3D prestack depth migration. The methods
presented in this paper can be applied in field data processing.</p>