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Reconstruction of Pressure and Shear Wave Velocity Profiles from Ambient Noise TomographyNormal access

Authors: A. Konkov and S. Manakov
Event name: 1st Conference on Geophysics for Geothermal and Renewable Energy Storage
Session: Seismic Methods for Geothermal Exploration and Monitoring II
Publication date: 11 September 2019
DOI: 10.3997/2214-4609.201902522
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 427.1Kb )
Price: € 20

Summary:
The paper considers a new method for determining the profiles of pressure and shear velocities based on the analysis of seismic noise. It is proposed to analyze two cross spectra of signals from mutually spaced receivers. The paper considers a new method for determining the profiles of pressure and shear velocities based on the analysis of seismic noise. It is proposed to analyze two cross spectra of signals from mutually spaced receivers. The first corresponds to the correlation between vertical projections of the surface displacement vector, the second − between its vertical and horizontal projections. Based on the phase variation with frequency one can judge on the Rayleigh wave dispersion and based on the spectra ratio – on the ellipticity. The latter makes it possible to reconstruct pressure and shear velocity profiles. Processing results of field measurements and their comparison with the data obtained via active source are demonstrated.


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