Virtual plane-wave imaging via Marchenko redatuming

Abstract

Marchenko redatuming is a novel scheme used to retrieve up- and down-going Green's functions in an unknown medium. Marchenko equations are based on reciprocity theorems and are derived on the assumption of the existence of functions exhibiting space-time focusing properties once injected in the subsurface. In contrast to interferometry but similarly to standard migration methods, Marchenko redatuming only requires an estimate of the direct wave from the virtual source (or to the virtual receiver), illumination from only one side of the medium, and no physical sources (or receivers) inside the medium. In this contribution we consider a different time-focusing condition within the frame of Marchenko redatuming that leads to the retrieval of virtual plane-wave responses. As a result, it allows multiple-free imaging using only a one-dimensional sampling of the targeted model at a fraction of the computational cost of standard Marchenko schemes. The potential of the new method is demonstrated on 2D synthetic models.

15 pages, 10 figures

References in corpus (2)

• Virtual acoustics in inhomogeneous media with single-sided access
• Elastodynamic single-sided homogeneous Green's function representation: Theory and numerical examples

Cited by in corpus (5)

• 3D Marchenko applications: implementation and examples
• Data-driven retrieval of primary plane-wave responses
• Wavefield Finite Time Focusing with Reduced Spatial Exposure
• A modified Marchenko method to retrieve the wave field inside a layered metamaterial from reflection measurements at the surface
• Design, implementation and application of the Marchenko Plane-wave algorithm