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Alternative Multicomponent Observables for Robust Full-waveform Inversion - Application to a Near-surface Example
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 77th EAGE Conference and Exhibition - Workshops, Jun 2015, Volume 2015, p.1 - 5
Abstract
In this study, using the framework of the Full Waveform Inversion (FWI) method we compare three different multicomponent cost-functions : the conventional multicomponent cost-function, a cost-function based on the normalized particle motion and a cost function only sensitive to the particle motion polarization.
With a synthetic test, it is showed that even if the attenuation model is poorly estimated the normalized particle motion misfit function and the polarization based cost functions are able to accurately recover the shear wave velocity parameters whereas the conventional multicomponent misfit function fails. Furthermore in context of near surface imaging, the proposed polarization based cost-function has the advantage to have a great sensitivity to the near-surface and to be independent of the knowledge of the source wavelet.