Patent ID: 7742876

Claim:
A method for marine seismic data acquisition, comprising: obtaining a 3D wavefield by cross-line acquisition using one or more marine seismic sources and a plurality of marine seismic receivers arranged into one or more lines, wherein: the one or more marine seismic sources are towed behind a seismic vessel in an essentially orthogonal direction relative to the one or more lines of the marine seismic receivers; the one or more marine seismic source are fired at intervals as the one or more mariner seismic sources are towed orthogonally with respect to the one or more lines of the marine seismic receivers; and an offset between shooting locations of the one or more seismic sources is regarded as an equal shift of the line of seismic receivers; and decomposing the obtained seismic wavefield by applying a decomposition filter having two spatial directions to obtain a decomposed wavefield, wherein the decomposition filter is applied as a cascaded filter.