Removal of surface‐related wave phenomena—The marine case

Borselen, R.G. van; Fokkema, J.T.; Berg, Peter

doi:10.1190/1.1443940

Cited by 41 publications

(12 citation statements)

References 4 publications

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“…When only sources at the surface z = 0 are used, these cross-terms lead to spurious contributions that have the same strength as peg-leg multiples. These spurious multiples are not removed by algorithms for the suppression of surface-related multiples ͑Verschuur et al, 1992; van Borselen et al, 1996;Dragoset and Jeričević, 1998͒ because kinematically they do not correspond to peg-leg multiples.…”

Section: Resultsmentioning

confidence: 99%

Spurious multiples in seismic interferometry of primaries

2006

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Seismic interferometry is a technique for estimating the Green's function that accounts for wave propagation between receivers by correlating the waves recorded at these receivers. We present a derivation of this principle based on the method of stationary phase. Although this derivation is intended to be educational, applicable to simple media only, it provides insight into the physical principle of seismic interferometry. In a homogeneous medium with one horizontal reflector and without a free surface, the correlation of the waves recorded at two receivers correctly gives both the direct wave and the singly reflected waves. When more reflectors are present, a product of the singly reflected waves occurs in the crosscorrelation that leads to spurious multiples when the waves are excited at the surface only. We give a heuristic argument that these spurious multiples disappear when sources below the reflectors are included. We also extend the derivation to a smoothly varying heterogeneous background medium.

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Section: Resultsmentioning

confidence: 99%

Spurious multiples in seismic interferometry of primaries

2006

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“…This means in seismic applications that multiples reflected from the free surface are eliminated (Wapenaar et al 2000;Amundsen 2001), while for electromagnetic waves the contaminating of the air wave is removed (Wapenaar et al 2008). The change in the surface boundary condition also forms the basis of other methods for the suppression of surface-related multiples in seismology (Riley and Claerbout 1976;Kennett 1979;Verschuur et al 1992;van Borselen et al 1996;Weglein et al 1998). We illustrate the freedom to change the boundary conditions in seismic interferometry with the response of the Millikan library at Caltech extracted from recorded vibrations of the building after an earthquake (Snieder and Ş afak 2006).…”

Section: Changing the Boundary Conditionmentioning

confidence: 92%

A Comparison of Strategies for Seismic Interferometry

et al. 2009

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The extraction of the response from field fluctuations excited by random sources has received considerable attention in a variety of different fields. We present three methods for the extraction of the systems response that are based on cross-correlation, deconvolution, and the solution of an integral equation, respectively. For systems that are invariant for time-reversal the correlation method requires random sources on a bounding surface only, but when time-reversal invariance is broken, for example by attenuation, a volume distribution of sources is needed. For this reason the correlation method is not useful for diffusive or strongly attenuating systems. We provide examples of the three methods and compare their merits and drawbacks. We show that the extracted field may satisfy different boundary conditions than does the physical field. This can be used, for example, to suppress surface-related multiples in exploration seismology, to study the coupling of buildings to the subsurface, and to remove the airwave in controlled source

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“…In practice, however, the source signature is unknown. Several strategies based on the suppression of multiples have been presented to estimate the operator A( f ) Carvalho & Weglein, 1994;van Borselen et al, 1996;Ikelle et al, 1997). In these studies, the estimation of the operator A( f ) is non-linear, which is an undesirable characteristic in the inversion process (Verschuur, 2006).…”

Section: Surface-related Multiple Elimination (Srme)mentioning

confidence: 99%

Determination of an Optimal Processing Flow for the Suppression of Free-Surface Multiples in Real 2d Marine Data

Gomes¹

2013

Rev. Bras. Geof.

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ABSTRACT. The presence of multiple reflections is common in marine surveys due to the air-water interface. Multiples have significant energy and can mask deep reflectors, leading to the misinterpretation of seismic cross-sections. In this study, surface-related multiple elimination (SRME), predictive deconvolution in the τ − p domain and Radon and f − k filtering are used to eliminate surface multiples in real 2D marine data. These methods are applied in different combinations, and the results are analyzed with the aim of determining an optimal seismic processing flow for the removal of surface multiples.Keywords: surface multiples attenuation, SRME, Radon filtering, predictive deconvolution in the τ − p domain, f − k filtering. RESUMO.No levantamento marinhoé comum a presença de reflexões múltiplas devidoà interface ar-água. Essas reflexões múltiplas possuem energia considerável e podem mascarar reflexões primárias (refletores) levando a erros de interpretação da seção sísmica. Neste trabalhoé determinado um fluxoótimo de processamento sísmico para atenuação de múltiplas de superfície. Os métodos de eliminação de múltiplas de superfície (SRME), deconvolução preditiva no domínio τ − p e as filtragens Radon e f − k são aplicados a um dado marinho real 2D em diferentes combinações. Os resultados são analisados com objetivo de determinar um fluxo de processamento sísmicoótimo para atenuação de múltiplas de superfície.Palavras-chave: atenuação de múltiplas de superfície, SRME, filtragem Radon, deconvolução preditiva no domínio τ − p, filtragem f − k.

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Removal of surface‐related wave phenomena—The marine case

Cited by 41 publications

References 4 publications

Spurious multiples in seismic interferometry of primaries

Spurious multiples in seismic interferometry of primaries

A Comparison of Strategies for Seismic Interferometry

Determination of an Optimal Processing Flow for the Suppression of Free-Surface Multiples in Real 2d Marine Data

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