Premium
ATTENUATION DES MULTIPLES EN SISMIQUE MARINE PAR ANTIMOYENNE *
Author(s) -
LAMER A.
Publication year - 1977
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.1365-2478.1977.tb01158.x
Subject(s) - multiple , attenuation , telmatology , noise (video) , geology , acoustics , algorithm , seismology , computer science , physics , optics , mathematics , artificial intelligence , arithmetic , image (mathematics) , tectonics
A bstract A satisfactory attenuation of the multiples in marine seismic may be obtained by the application of the principle of “Antiaveraging”. This principle in a first step consists in getting the model of the organized noise, which one tries to eliminate by using an averaging method, and in a second step to subtract that model from the initial information. Obviously the elimination of the model should not simultaneously cause the elimination of useful signals. The model may be obtained if the considered organized noise keeps a constant shape or if its time‐space deformation is known. Besides one has to assume the time‐distance curve of the organized noise can be determined. Thus noise arrivals may be detected on the records. The “antiaveraging” is very often efficient when organized noises are stronger than signals or when a signal, once identified, exploited and then considered as an organized noise, can be attenuated in order to make the detection of the other signals easier.