Towards Super-resolution Surface Wave Tomography Using Interferometry
C. Berron and T. Bardainne
Event name: 80th EAGE Conference and Exhibition 2018
Session: Near Surface - High Resolution Seismic and Surface Waves
Publication date: 11 June 2018
Info: Extended abstract, PDF ( 734.02Kb )
Price: € 20
A Rayleigh surface wave tomography is proposed with an optimal coverage approach based on the creation of virtual raypaths by interferometry. Array based conventional surface wave picking methods often provide inhomogeneous or sparse coverage for high-resolution surface wave tomography. The delivered inversion results can suffer from acquisition pattern imprints or poor lateral resolution. We propose to create new optimally chosen virtual raypaths that better condition the information. The kinematics of Rayleigh wave's Green functions are then analyzed by a direct inversion of the surface wave phase interference pattern. The concept is proved on synthetics and illustrated on a 3D real data example.