Migration method and system a multi-component seismic data inverse least squares

A multi-component seismic data offset inverse least squares method and the image forming system, which method is improved in the elastic wave based on the RTM method, can be directly input to a multi-component seismic data, the inversion of the lower frame by using different wavefield extrapolation operator and the new imaging conditions at different steps of the offset, the offset enabling the imaging inversion based on multi-component seismic data. Offset, when compared to a conventional acoustic wave is inversely shifted available precision, high resolution, high signal when the inversion of the present invention to introduce the idea of ​​the reverse acoustic wave, the amplitude fidelity of prestack depth migration sectional ; phase axis can overcome the destructive interference caused by the polarity inversion shear, and shear waves are maintained intact in the characteristic vector, the amplitude and phase characteristics while effectively eliminating the offset between the compressional and shear wave crosstalk artifacts caused by increased the imaging accuracy can be applied to multi-component seismic data shifted complex media model, and the cross-sectional image clear, easy to post geological interpretation.