f A Unified approach to seismic reflection imaging

Given a seismic record of either displacement or pressure seismograms and assuming a laterally inhomogeneous, isotropic three-dimensional (3-D) macro-velocity model, we provide a complete theory of seismic reflection imaging. It consists of (a) a Kirchhoff-type weighted diffraction stack to transform (migrate) the seismic data from the record space (i.e., the time-distance domain) into the image space (i.e.. the depth-distance domain) and (b) a weighted isochrone stack to transform (demigrate) the migrated seismic inlage back into the record space.