Patent ID: 9030912
Filing Date: 2015-05-12
Classification: G01V

Abstract:
1. A method for separating and composing seismic waves, the seismic wave having a primary wave (P-wave) and a shear (S-wave), the method is operated using a processing device, and comprising acts of: determining base vectors of the P-wave and S-wave vectors respectively in each quadrant of a Descartes coordinate system R-O-Z during a sliding time window by using a vector composition method, and comprising: decomposing of P-wave and S-wave vectors along the first and second axes, which are corresponded to a sliding time window; forming a non-orthogonal affine coordinate system using directions of the P-wave and S-wave vectors as axes; transforming the non-orthogonal affine coordinate system from the Descartes coordinate system R-O-Z based on angles between the axes of the coordinate system and the decomposed vectors of the P-wave and S-wave; decomposing the P-wave and S-wave vectors in the sliding time window; and selecting vectors of the P-wave and S-waves that are paralleled to the base vectors of the P-wave and S-wave, wherein the selected affine vectors of P-wave and S-wave are signals with true amplitudes.