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A LAYER‐STRIPPING TECHNIQUE FOR THE SUPPRESSION OF WATER‐BOTTOM MULTIPLE REFLECTIONS *
Author(s) -
CARRION Ph.M.
Publication year - 1986
Publication title -
geophysical prospecting
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.735
H-Index - 79
eISSN - 1365-2478
pISSN - 0016-8025
DOI - 10.1111/j.1365-2478.1986.tb00470.x
Subject(s) - bottom water , filter (signal processing) , geology , time domain , multiple , frequency domain , domain (mathematical analysis) , optics , algorithm , acoustics , computer science , oceanography , mathematics , physics , mathematical analysis , arithmetic , computer vision
A new method to suppress water‐bottom multiples (water‐bottom reverberations) uses the fact that in the domain of intercept time and ray parameter (τ– p domain) the water‐bottom reverberations are strictly periodical for a horizontal flat sea bottom. Using this property a comb filter can be designed. The window of the filter should be approximately equal to the duration of a source pulse. The algorithm finds the maximum of the periodical energy throughout the τ– p domain and then designs the comb filter which eliminates the water bottom reverberations from each trace in the τ – p domain. This process can be repeated for higher order reverberations. Finally the τ– p domain with attenuated multiples is transformed back to the conventional x ‐ ‐ t space. The method is illustrated on a variety of synthetic data and on a set of real marine CMP data acquired in the North Sea near the Norwegian shore.