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Inversion of Rayleigh-Wave Phase and Group Velocity Dispersion Curves for S-Wave Velocity by Grey Wolf OptimizationNormal access

Authors: D. Vashisth and B. Shekar
Event name: 81st EAGE Conference and Exhibition 2019
Session: Poster: Near-Surface Methods and Applications
Publication date: 03 June 2019
DOI: 10.3997/2214-4609.201901454
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 382.33Kb )
Price: € 20

Summary:
Inversion of surface wave dispersion curves is widely used to characterize the near surface. As the inverse problem is highly non-linear, robust and efficient global optimization strategies may be best suited to find the global minimum. Here, we introduce the Grey Wolf Optimization (GWO), a swarm intelligence technique for the inversion of Rayleigh-wave phase and group velocity dispersion curves. The performance of GWO in retrieving the S-wave velocity is illustrated on a near-surface model and the results have been compared to those obtained from a perturbation approach based on finite-element modelling.


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