Abstract: The CRP ray path and amplitude variation characters in underlying strata of complex structure are of significance to the study of continuous seismic information such as the pre-stack inversion and AVO character analysis. In this paper, the ray tracing method is used for the seismic forward modeling, and the neighborhood well migration data are applied for the model design of complex structure. The analysis of the effect of the complex structure on underlying strata's seismic wave dynamics characteristics shows that the CRP from conventional methods for complex structural exploration has an asymmetric property, including CRP from actic region bottom boundary and the lateral reflection energy variation. It is shown that only local zones can reach full seismic coverage, which posts that complex structure has a big impact on underlying zone's reflecting dynamics characters.

Key words: complex structure, forward model, ray tracing, dynamics, impact analysis