Phase shift plus interpolation migration with scattering terms

Shang Huang, Daniel O. Trad

The phase shift plus interpolation (PSPI) algorithm is a useful tool to directly solve the scalar wave equation and the results have the natural properties of the wave equation. One common issue is PSPI migration is aperture limited. In this paper, we proposed an approach that extends the illumination by adding the scattering term in PSPI migration. The benefit is keeping the input the same which means this method does not need to estimate or modify the shot records. Iteratively adding the scattering term for each boundary layer. Numerical examples show that this improved method can recover broader illumination, for example, the horizontal events and dome structures, compared with PSPI migration only.