Patent ID: 7369944
Filing Date: 2008-05-06
Classification: G01V

Abstract:
1. A method of processing seismic data comprising a gather of seismic traces organized according to one or several acquisition parameters, each trace comprising a seismic signal corresponding to waves that have traveled through a subsoil and have been recorded by a seismic receiver, said signal being defined by an amplitude as a function of time or depth, the method comprising the steps of: a) defining a base of elementary functions of the acqusition parameter(s), b) orthogonalising said elementary functions so as to define a base of orthogonal elementary functions c) for a given time or at a given depth, determining combination coefficients defining a combination of the orthogonal elementary functions, said combination being an estimator of a variation in the amplitude of the seismic signal as a function of the acquisition parameter(s), so as to deduce information about lithological properties of the subsoil based on said estimator.