Seismic acquisition scheme to image overdeepened alpine valleys by high-resolution seismic method and full-waveform inversion

Le résumé fourni par la source

Abstract. The successful integration of high-resolution seismic reflection (HRSR) and full waveform inversion (FWI) enhances detailed near-surface imaging in heterogeneous glacial and post-glacial environments. To develop a tailored workflow of combining HRSR and FWI, we acquired dense P-wave and S-wave datasets, utilizing both vibratory and explosive seismic sources over an overdeepened basin in the northern Alpine foreland. The data acquisition was designed to meet the requirements of HRSR as well as FWI. Results of separated data analysis of HRSR and FWI, using standard processing workflows, show the potential of the acquired datasets. HRSR revealed detailed subsurface structures, including basin base reflectors, intra-basin discontinuities, and subtle stratigraphic variations. S-wave data provides superior resolution in imaging the basin fill down to 200 m below surface. FWI workflow converged successfully, yielding a consistent and physically reasonable model that correlates well with the HRSR results. These datasets are the basis for further methodological development of combining HRSR and FWI.

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