Dispersion inversion of guided P-waves in a waveguide of arbitrary geometry
KAUST DepartmentCenter for Subsurface Imaging and Fluid Modeling
Earth 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/10754/631488
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AbstractWe present the theory for wave equation inversion of dispersion curves obtained from traces containing guided P waves. The misfit function is the sum of the squared differences between the wavenumbers along the predicted and observed dispersion curves, and the inverted result is a high-resolution estimate of the near-surface P-velocity model. This procedure, denoted as the wave equation dispersion inversion of guided P waves (WDG), is valid for near-surface waveguides with irregular layers. It is less prone to the cycle skipping problems of full waveform inversion (FWI) and can sometimes provide velocity models with higher resolution than wave-equation traveltime tomography (WT). The synthetic and field data examples demonstrate that WDG for guided P waves can accurately reconstruct the P-wave velocity distribution in laterally heterogeneous media.
CitationLi J, Hanafy S, Schuster GT (2018) Dispersion inversion of guided P-waves in a waveguide of arbitrary geometry. SEG Technical Program Expanded Abstracts 2018. Available: http://dx.doi.org/10.1190/segam2018-2996586.1.
SponsorsWe thank the financial support from the sponsors of the Consortium of Subsurface Imaging and Fluid Modeling (CSIM) and the supercomputing center at KAUST for computational resources. We also thank the China Postdoctoral Science Foundation 2106T902503 and 2015M571366.
PublisherSociety of Exploration Geophysicists
Conference/Event name88th Society of Exploration Geophysicists International Exposition and Annual Meeting, SEG 2018