Premium
PRESTACK INVERSION OF GROUP‐FILTERED SEISMIC DATA 1
Author(s) -
HELGESEN JAN
Publication year - 1991
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.1365-2478.1991.tb00315.x
Subject(s) - inversion (geology) , geology , inverse , synthetic data , economic geology , preprocessor , inverse transform sampling , geodesy , acoustics , optics , seismology , algorithm , mathematics , physics , computer science , geometry , surface wave , telmatology , tectonics , artificial intelligence
A bstract Three methods for least‐squares inversion of receiver array‐filtered seismic data are investigated: (1) point receiver inversion where array effects are neglected; (2) preprocessing of the data with an inverse array filter, followed by point receiver inversion; (3) array inversion, where the array effects are included in the forward modelling. The methods are tested on synthetic data generated using the acoustic wave equation and a horizontally stratified earth model. It is assumed that the group length and the group interval are identical. For arrays that are shorter than the minimum wavelength of the emitted wavefield, and when the data are appropriately muted, point receiver inversion (first method) gives satisfactory results. For longer arrays, array inversion (third method) should be used. The failure of the inverse array filter (second method) is due to aliasing problems in the data.