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Near-surface Characterization Using Point Receiver DataNormal access

Authors: L. Velasco, C. Strobbia and A. Laake
Event name: 72nd EAGE Conference and Exhibition incorporating SPE EUROPEC 2010
Session: Near Surface Effects for E&P / Civil Engineering Applications (EAGE)
Publication date: 14 June 2010
DOI: 10.3997/2214-4609.201401021
Organisations: SPE, EAGE
Language: English
Info: Extended abstract, PDF ( 1.72Mb )
Price: € 20

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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