Patent ID: 7436735

Claim:
A method of seismic processing for obtaining information on the geophysics of subsoil, the method comprising: acquiring seismic traces at at least one point on the surface of the subsoil, the seismic traces corresponding on each occasion to two perpendicular components of a shear wave emitted into the subsoil and reflected by different interfaces therein; applying a succession of inverse transformations (⊥) at least to a temporal portion of the seismic traces to obtain result traces, the inverse transformations to restore transformations that it is assumed that the shear wave has encountered on passing through a succession of layers in the subsoil, the layers being analyzed as a whole, and an operation of applying the succession of inverse transformations being repeated for different assumptions concerning birefringence in the layers; for each of these assumptions, determining a value of a parameter representative of the coherence/similarity between the result traces; and selecting as a function of the values obtained in this way that one of the assumptions which is considered as being most representative of the subsoil, two final result traces obtained for said assumption being compensated for the subsoil birefringency, wherein the two final result traces are obtained by analyzing the layers as a whole.