Do we need up/down decomposition for Marchenko imaging?
C.P.A. Wapenaar (TU Delft - ImPhys/Medical Imaging, TU Delft - Applied Geophysics and Petrophysics)
Roel Snieder (Colorado School of Mines)
Sjoerd de de Ridder (University of Leeds)
E.C. Slob (TU Delft - Applied Geophysics and Petrophysics)
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Abstract
Marchenko redatuming, imaging, monitoring and multiple elimination methods are based on Green’s function representations, with the underlying assumption that the wave field in the subsurface can be decomposed into downgoing and upgoing waves and that evanescent waves can be neglected. In this paper we show that up/down decomposition in the subsurface is actually not needed for the derivation of these representations. This opens the way for research into new Marchenko methods which are not limited by the assumption that up/down decomposition is possible and which, in principle, can handle evanescent waves.