Redatuming CDP data below salt with VSP green's function

Common depth point (CDP) data can be naturally redatumed below salt with a vertical seismic profile (VSP) Green's function. In this case only VSP and CDP data are required and no velocity model is needed. Here both the Kirchhoff single-arrival datuming and multi-arrival (asymptotic) datuming (KMAD) methodologies are applied to SEG/EAGE salt model data and acceptable redatuming results are achieved. It shows that both of these methods can be used to redatum CDP data beneath the salt without knowing the velocity model of the salt body or overburden. However, the multi-arrival datuming method provides a more accurate datuming result than the single-arrival datuming method. The benefit of this method is that redatumed CDP data can be used, in principle, to more clearly image reflectors beneath the salt.