True‐amplitude migration of 2D synthetic data¹

Abstract

Abstract True‐amplitude (TA) migration, which is a Kirchhoff‐type modified weighted diffraction stack, recovers (possibly) complex angle‐dependent reflection coefficients which are important for amplitude‐versus‐offset (AVO) inversion. The method can be implemented using existing prestack or post‐stack Kirchhoff migration and fast Green's function computation programs. Here, it is applied to synthetic single‐shot and constant‐offset seismic data that include post‐critical reflections (complex reflection coefficients) and caustics. Comparisons of the amplitudes of the TA migration image with theoretical reflection coefficients show that the (possibly complex) angle‐dependent reflection coefficients are correctly estimated.