Comparison of seismic diffraction imaging techniques: plane wave destruction versus apex destruction

摘要

Seismic diffraction imaging provides a method for identifying subsurface scattering features with improved resolution relative to conventional seismic reflection imaging. Successfully separating signals corresponding to diffraction events from reflection events is an essential component of diffraction imaging. Different techniques for separation exist, including plane wave destruction (PWD) and apex destruction in the migrated dip-angle domain (AD). We analyze separating diffractions from reflection events using a simple toy model and a field data set from the Piceance Basin, and evaluate the ability of each method to resolve scattering features. Results indicate that the PWD method leads to an image that preserves more diffraction energy and has fewer migration artifacts, but might be unable to eliminate reflection events whose slope is not continuously variable.