Converted wave amplitude-preserving prestack migration by pseudo-offset migration

Key words:  amplitude-preserving  converted wave  pseudo-offset migration (POM)  prestack migration

Abstract:

Converted-wave amplitude-preserving weighting function by pseudo-offset migration (POM) was deducted based on single way wave equation, and amplitude-preserving was performed in the mapping POM gathers directly Amplitude-preserving POM prestack migration not only simplifies conventional processing procedure and improves fold and signal-to-noise ratio, but also achieves ampiitude quantitative analysis during migration. The results show that the converted-wave POM can accurately image tlie structure for whether flat layers or dipping layers，meanwhile the reflectivity could be indicated by the amplitude peak value of migrated section.