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Abstract

The effect of near-surface perturbations is still one of the key problems in land seismic surveys. Elastic near-surface characterization can provide a robust solution for the compensation of the effects of the shallow geology on surface seismic data. Seismic point receivers provide densely sampled data that enable the use of high-resolution methods for near-surface characterization. Near-offset refractions and surface wave inversion allow generation of shallow 3D depth models for P-wave and S-wave velocity. The two models reveal near-surface geological layers and lateral heterogeneities. A case study from the Gulf of Suez gravel planes demonstrates that lateral heterogeneities in shallow P-wave and S-wave velocity horizons map shallow faults. The results are validated by fault outcrop maps from remote sensing. For the first time the elastic near-surface model is being estimated from surface seismic data. Point-receiver technology provides geological information in a domain that is usually not accessible for seismic investigation. The approach to attenuate shallow seismic data in conventional acquisition is replaced by a method that focuses specifically on the extraction of shallow seismic data for geological mapping.

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/content/papers/10.3997/2214-4609-pdb.159.C03
2010-05-18
2020-06-05
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http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609-pdb.159.C03
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