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Virtual signals combination – phase analysis for 2D and 3D data representation (acoustic medium)
Author(s) -
Poletto Flavio,
Bellezza Cinzia,
Wapenaar Kees,
Craglietto Aronne
Publication year - 2012
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.1365-2478.2011.01020.x
Subject(s) - seismic interferometry , geology , interferometry , seismic exploration , convolution (computer science) , cross correlation , acoustics , phase (matter) , computer science , seismology , optics , physics , mathematics , mathematical analysis , artificial intelligence , quantum mechanics , artificial neural network
ABSTRACT We formulate the Kirchhoff‐Helmholtz representation theory for the combination of seismic interferometry signals synthesized by cross‐correlation and by cross‐convolution in acoustic media. The approach estimates the phase of the virtual reflections from the boundary encompassing a volume of interest and subtracts these virtual reflections from the total seismic‐interferometry wavefield. The reliability of the combination result, relevant for seismic exploration, depends on the stationary‐phase and local completeness in partial coverage regions. The analysis shows the differences in the phase of the corresponding seismic interferometry (by cross‐correlation) and virtual reflector (by cross‐convolution) signals obtained by 2D and 3D formulations, with synthetic examples performed to remove water layer multiples in ocean bottom seismic (OBS) acoustic data.