Double Square Root Equation Migration Methods of Narrow Azimuth Seismic Data

Abstract

After reviewing the basic principle of the migration methods based on the double square root (DSR) equation, we introduce a fast algorithm of angle domain imaging to facilitate migration velocity analysis (MVA). Then we discuss two approaches to migrate the narrow azimuth seismic data. One has restriction to the input data set, the other has limitation of the wave propagation direction. The numerical tests show that the DSR equation prestack depth migration methods, such as common azimuth migration, have a promising prospect of application in areas with strong lateral variations of velocity where bsalt, reef or burred hills exist.