Wave-equation dispersion inversion of guided P waves in a waveguide of arbitrary geometry

J. Li, S. Hanafy, Gerard T. Schuster

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We present the theory for wave-equation inversion of dispersion curves obtained from 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 Pwaves (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.
Original languageEnglish (US)
Title of host publication80th EAGE Conference & Exhibition 2018 Workshop Programme
PublisherEAGE Publications BV
ISBN (Print)9789462822573
DOIs
StatePublished - Mar 13 2019

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