Multiscale and layer-stripping wave-equation dispersion inversion of Rayleigh waves
KAUST DepartmentEarth Science and Engineering Program
Physical Science and Engineering (PSE) Division
Online Publication Date2018-08-27
Print Publication Date2018-08-27
Permanent link to this recordhttp://hdl.handle.net/10754/631484
MetadataShow full item record
AbstractRayleigh-wave inversion could converge to a local minimum of its objective function for a complex subsurface model. We develop a multiscale strategy and a layer-stripping method to alleviate the local minimum problem of wave-equation dispersion inversion of Rayleigh waves, and improve the inversion robustness. We first invert the high-frequency and near-offset data for the shallow S-velocity model, and gradually incorporate the lower-frequency components of data with longer offsets to reconstruct the deeper regions of the model. We demonstrate the efficacy of this multiscale and layer-stripping method using synthetic and field Rayleigh-wave data.
CitationLiu Z, Huang L (2018) Multiscale and layer-stripping wave-equation dispersion inversion of Rayleigh waves. SEG Technical Program Expanded Abstracts 2018. Available: http://dx.doi.org/10.1190/segam2018-2997500.1.
SponsorsThis work was supported by U.S. Department of Energy through contract DE-AC52-06NA25396 to Los Alamos National Laboratory (LANL). Zhaolun Liu would like to thank King Abdullah University of Science and Technology (KAUST) for funding his graduate studies. The computation was performed using super-computers of LANL's Institutional Computing Program. Additional computational resources were made available through the KAUST Supercomputing Laboratory (KSL).
PublisherSociety of Exploration Geophysicists
Conference/Event name88th Society of Exploration Geophysicists International Exposition and Annual Meeting, SEG 2018