New insights in migration through analogies between Generalized Diffraction Tomography and Syn- thetic Aperture Radar.

摘要: Summary Migration methods in seismics are many ways equivalent to Synthetic Aperture Radar imaging techniques. Following a local plane-wavenumber approach, Generalized Diffraction Algorithm can be rewritten perform as Fast Fourier Transform cartesian coordinate system. We thus obtain proper migration with correct mapping from the acquisition system desired image of earth’s structures, i.e., simple and Jacobian calculations, adapted each point. As result working approach domain, we get, by just analyzing one point, showing structures around that point well. These images will show increasing distortion distance central They still provide valuable information about structure at very low computer cost could used for parameter setting or velocity analysis via CIP gathers. Many classic, efficient controlled processing, prior Transform, should easy spatial frequency domain. Control aliasing, resolution, scattering angle selection, irregular sampling oversampling, coherent noise reduction other processing done locally, order improve migration.