Marchenko wavefield redatuming, imaging conditions, and the effect of model errors

Marchenko wavefield redatuming, imaging conditions, and the effect of model errors

de Ridder, Sjoerd (University of Edinburgh)
van der Neut, J.R. (TU Delft Applied Geophysics and Petrophysics)
Curtis, A (University of Edinburgh)
Wapenaar, C.P.A. (TU Delft Applied Geophysics and Petrophysics)

Sicking, Charles (editor)
Ferguson, John (editor)

2016

Recently, a novel method to redatum the wavefield in the sub-surface from a reflection response measured at the surface has gained interest for imaging primaries in the presence of strong internal multiples. A prerequisite for the algorithm is an accurate and correct estimate of the direct-wave Green's function. However, usually we use an estimate for the direct-wave Green's function computed in a background velocity medium. Here, we investigate the effect of amplitude and phase errors in that estimate. We formulate two novel imaging conditions based on double-focusing the measured reflection response inside the subsurface. These yield information on the amplitude error in the estimate for the direct-wave Green's function which we can then correct, but the phase error remains elusive.

inversion
autofocusing
imaging
internal multiples
velocity

http://resolver.tudelft.nl/uuid:55668444-8773-44ce-a542-b28883d3654c

https://doi.org/10.1190/segam2016-13777555.1

SEG

SEG Technical Program Expanded Abstracts 2016

SEG International Exposition and 86th Annual Meeting, 2016-10-16 → 2016-10-21, Dallas & Kay Bailey Hutchison Convention Center, Dallas, United States

SEG Technical Program Expanded Abstracts, 1949-4645, 2016

Institutional Repository

conference paper

© 2016 Sjoerd de Ridder, J.R. van der Neut, A Curtis, C.P.A. Wapenaar