Patent ID: 6748330
Filing Date: 2004-06-08
Classification: G01V

Abstract:
A method for decomposition of a seismic plane wave for three dimensional vertical seismic profile data comprising the steps of:a. receiving a plurality of signals from a downhole seismic receiver array; b. Fourier transforming all waveforms to the frequency domain; c. specifying plane wave propagation angles for each wave type by specifying an angular aperture and a number of plane waves; c. specifying medium properties local to the receiver array; d. computing polarization and slowness vectors using the propagation angles and the medium properties; e. inputting the polarization and slowness vectors into a polarization moveout matrix and computing an operator; g. applying the operator to the vector data to determine scalar plane wave Fourier coefficients; h. summing subsets of scalar plane waves into grouped plane waves; and i. inverse Fourier transforming the grouped plane waves to decompose the wavefields into its separate components.