The Sectional Auto‐correlogram and the Sectional Retro‐correlogram *

Anstey, N. A.

doi:10.1111/j.1365-2478.1966.tb02245.x

Cited by 22 publications

(17 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…For a strong surface primary reflection (12) generally gives by far the largest contribution to TKf(&L + El) ( see appendix I and also Anstey and Newman 1966). Comparison of (9~) with (12) suggests to replace RO * fi by cc .…”

Section: Developmentofthetheorybehindtheapplied Proceduresmentioning

confidence: 92%

Cancelling Multiple Reflections by Feedback *

Koehler

Krey

Wachholz

1974

Geophysical Prospecting

View full text Add to dashboard Cite

For horizontal layering and plane horizontal impulsive wavefronts it is theoretically possible to get rid of multiple reflections by a feedback procedure which can easily be derived using raypath philosophy. To reduce the increase of noise inherent in the method the precise theoretical formulae are altered in such a manner that a practical application becomes possible. For this purpose the autocorrelation will be used. Application of the new process to a CRP section where the shot geophone distances in the field had not been long enough to attenuate multiple reflections effectively gave favourable results.

show abstract

Section: Developmentofthetheorybehindtheapplied Proceduresmentioning

confidence: 92%

Cancelling Multiple Reflections by Feedback *

Koehler

Krey

Wachholz

1974

Geophysical Prospecting

View full text Add to dashboard Cite

show abstract

“…Ceci est bien connu (Anstey 1966, J ac k son 1968, Bourrouilh 1970, Fontanel et Grau 1971 La figure 4 présente encore un cas de traitement ayant réussi de facon satisfaisante. L'exploitation de la comparaison des autocorrélogrammes est ' immédiate: il convient cependant de signaler que la grande largeur apparente de l'axe focal de I'autocorrélogramme après traitement est simplement due à une diffusion dans l'emulsion photographique liée à la forte luminance de l'axe focal.…”

Section: A) -Controle Optique Des Traitements De Deconvolution Et De unclassified

“…Au cours d'une seconde opération qui voit ce spectre de puissance placé à son tour dans le plan-objet, l'analyse spectrale, toujours pratiquée en optique sphérocylindrique, donnera donc l'autocorrélation de la trace. Ceci est bien connu (Anstey 1966, J ac k son 1968, Bourrouilh 1970, Fontanel et Grau 1971 et nous nous proposons seulement ici de décrire une application particulière de cette manipulation qui va permettre à la calculatrice optique de mettre ses qualités de souplesse et de commodite au service des calculatrices numériques en apportant la possibilité, par un test immédiat pratiqué au niveau des documents d'exploitation eux-mêmes, d'une appréciation rigoureuse de l'efficacité des traitements par ordinateurs.…”

Section: A) -Controle Optique Des Traitements De Deconvolution Et De unclassified

Controle Optique Des Traitements Numériques Déconvolution Optique Des Traces Sismiques *

Bourrouilh¹

1974

Geophysical Prospecting

View full text Add to dashboard Cite

Summary A checking method of digital multiple elimination and of deconvolution processing using computers and based on optical autocorrelation is first presented. Comparison between autocorrelograms before and after a single or several processing steps allows to estimate, on one hand, the strength of the deconvolution obtained, known by the study of the central parts which is in fact the signal autocorrelation, on the other hand, the multiple elimination given by the study of side parts of the autocorrelogram. Further, an optical deconvolution procedure, is presented. For this, it is supposed that the signal is known and optically reproduced in the same way as the one of a trace. This is achieved by sphero‐cylindrical optics allowing trace to trace processing. Deconvolution is carried out in the spectral domain by inserting a filter in the Fourier plane of the optical unit, the transmission law of which expresses the Fourier transform of the antisignal. This filter device introduces a holographic technique called Fourier holography, in such a way phases as well as amplitudes are preserved. Several results are presented from a synthetic section and also from field sections.

show abstract

“…It has been recognized that the surfacerelated multiples are always dominating multiple energy in seismic data. Theoretical work on surface-related multiple modelling and elimination in 1-D and multidimensional medium has been made by Anstey et al [26] , Riley et al [27] , Kennett et al [28] , and Berkhout et al [15∼16] . Verschuur et al [17∼19] suggested the adaptive surface-related multiple elimination procedure with applications to field data.…”

Section: Introductionmentioning

confidence: 99%

Surface-Related Multiple Prediction and Suppression Based on Data-Consistence: A Theoretical Study and Test

Huang

Sun

Bin-hua

et al. 2005

Chinese J. Geophys.

View full text Add to dashboard Cite

Based on the acoustic wave field theory, we first study the forward model of seismic data for the case without free surface. Then we consider the case with a reflecting free surface, and derive the forward and inverse models for surface‐related multiple prediction and attenuation. In the physical insight, generation, prediction and attenuation of the wave is also deeply analyzed. The data‐consistence‐based time‐space convolution method is discussed and implemented. The method is formulated by an iterative adaptive procedure. An example with a complex bottom and complex multiple generating system is given to demonstrate its validity and stability of the method which can attenuates multiple energy effectively while keeping the primary events not damaged.

show abstract

The Sectional Auto‐correlogram and the Sectional Retro‐correlogram *

Cited by 22 publications

References 7 publications

Cancelling Multiple Reflections by Feedback *

Cancelling Multiple Reflections by Feedback *

Controle Optique Des Traitements Numériques Déconvolution Optique Des Traces Sismiques *

Surface-Related Multiple Prediction and Suppression Based on Data-Consistence: A Theoretical Study and Test

Contact Info

Product

Resources

About