Migração Kirchhoff-Gaussian-Beam Pré-Empilhamento Em Tempo (Kgb-Pstm)

We present a Kirchhoff-type prestack time migration using<br>the concept of Gaussian Beams (GB’s). The approach<br>considers the superposition of paraxial amplitudes in the<br>vicinity of every trace location in a common-offset section,<br>mapped through the determination of the Fresnel volume<br>elements of the seismic experiment. These amplitudes<br>are the stacked and smeared by the use of a GB<br>operator, which is a high-frequency representation of the<br>seismic wavefield, prior to being migrated to its true<br>position in the time domain.