We present a migration velocity analysis (MVA) method based on wavefield extrapolation.
Similarly to conventional MVA, our method aims at iteratively improving the quality of the …

In the past decade, 3D reflection seismology has replaced 2D seismology almost entirely in
the seismic industry. Recording 3D surveys has become the norm instead of the exception …

With the use of Fourier analysis, we describe the propagation and scattering of acoustic
waves in smoothly varying, heterogeneous media. The starting point is the generalized …

The De Wolf approximation has been introduced to overcome the limitation of the Born and
Rytov approximations in long range forward propagation and backscattering calculations …

The phase-screen and the split-step Fourier methods, which allow modeling and migration
in laterally heterogeneous media, are generalized here so as to increase their accuracies for …

Dual-domain one-way propagators implement wave propagation in heterogeneous media in
mixed domains (space-wavenumber domains). One-way propagators neglect wave …

Beamlet migration based on local perturbation theory is proposed. The method is formulated
with a local background velocity and local perturbations for each window of the wave field …

The forward and adjoint operators for shot-profile least-squares migration are derived. The
forward operator is demigration, and the adjoint operator is migration. The demigration …

I present an unconditionally stable, implicit finite-difference operator that corrects the
constant-velocity phase-shift operator for lateral velocity variations. The method is based on …

A 3D multicomponent prestack depth-migration method is presented. An elastic-screen
propagator based on one-way wave propagation with a wide-angle correction is used to …