3D pre-stack full time migration technique and application

摘要

Pre-stack full time migration is advanced and economical processing technique with good result. This paper analysis the PSTM technique with Kirchhoff algorithm and research it, then discuss how to choose the key parameter: the aperture width, maximum dip to migrate and the velocity to migrate. And author put forward the way that how to get the accurate velocity for migration with difference percentage scanning. We have got the good results after applied the technique to two big 3D seismic data. The scope of application for this technique is the complex structure seismic data without huge transverse velocity change.