Internal multiple suppression by adaptive Marchenko redatuming

Internal multiple suppression by adaptive Marchenko redatuming

Van der Neut, J.R.
Wapenaar, C.P.A.
Thorbecke, J.W.
Vasconcelos, I.

Civil Engineering and Geosciences

Geoscience & Engineering

2014-10-26

Recently, a novel iterative scheme was proposed to retrieve Green's functions in an unknown medium from its single-sided reflection response and an estimate of the propagation velocity. In Marchenko imaging, these Green's functions are used for seismic imaging with complete wavefields, including internal multiple reflections. In this way, common artifacts from these internal reflections are avoided and illumination of the subsurface can potentially be improved. However, Marchenko imaging requires accurate input data, with correct amplitudes, a deconvolved source signature, without free-surface multiples and source / receiver ghosts. Hence, a significant amount of preprocessing is required, which should be done accurately. To relax these requirements, we propose a scheme to remove artifacts due to internal multiples from inverse-extrapolated wavefields, by adaptively subtracting an estimate of these artifacts that is constructed with the Marchenko equation.

autofocusing
internal multiples

http://resolver.tudelft.nl/uuid:7b0b9d5d-7895-4d46-9b03-d618bd9734fa

SEG

1052-3812

SEG Technical Program Expanded Abstracts, 2014; 84th Conference of the Society of Exploration Geophysicists (SEG), Denver, USA, 26-31 October 2014

Institutional Repository

conference paper

(c) 2014 SEG