
TY  - JOUR
A1  - Sun, Weijia 
A1  - Fu, Li-Yun 
A1  - Zhou, Binzhong 
T1  - A robust scheme to output angle-domain common image gathers for shot-profile migration
JF  - ASEG Extended Abstracts
JO  - ASEG Extended Abstracts
Y1  - 2012
VL  - 2012
IS  - 1
SP  - 1
EP  - 4
KW  - 
UR  - https://doi.org/10.1071/ASEG2012AB080 
N2  - Angle-domain common image gathers (CIGs) play an important role in migration-based velocity updating. One popular criterion of migration velocity analysis (MVA) is the flatness of common-angle image gathers. We first revisit the popular schemes of generating angle-domain CIGs by wavefield continuation migration. Then, we present an alternative approach to produce common angle image gathers. Our method, one of multiple-weight methods, is also for shot-profile migration based on one way wave equation. To avoid the stability problem of multiple-weight methods, our scheme is implemented in complex number domain for every frequency after imaging. The ability of anti-alias resulted from sparse shot geometry is investigated. Numerical examples show that our strategy is efficient, stable, and easy to implement. 
ER  -

