Comparação da Modelagem Sísmica Usando Teoria do Raio, Aproximação de Kirchhoff E Superposição de Feixes Gaussianos Limitados À Primeira Zona Fresnel Projetada

Seismic modeling is a major step for generation of synthetic seismograms as to assist in seismic inversion. In this paper, we discuss the seismic modeling using different approaches based on asymptotic ray theory. The first simulation of a seismogram uses the standard ray theory. Already, the second simulation uses the Kirchhoff scattering approach, that is the basis for a number of important techniques for computing synthetic seismograms. The last approach is based on the simulation of wave field by a system of reflected Gaussian beams, where each beam is continued independently through an arbitrary velocity medium, so the wave field in a receiver is then obtained by a superposition integral of all Gaussian beams arriving in the vicinity of the receiver, which in this paper is limited by the first projected Fresnel zone.