Dispersion inversion of guided p waves in a waveguide of arbitrary geometry

Jing Li, Sherif Hanafy, Gerard T. Schuster

Research output: Contribution to conferencePaperpeer-review

1 Scopus citations

Abstract

We 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.

Original languageEnglish (US)
Pages2526-2530
Number of pages5
DOIs
StatePublished - Jan 1 2019
Event88th Society of Exploration Geophysicists International Exposition and Annual Meeting, SEG 2018 - Anaheim, United States
Duration: Oct 14 2018Oct 19 2018

Conference

Conference88th Society of Exploration Geophysicists International Exposition and Annual Meeting, SEG 2018
CountryUnited States
CityAnaheim
Period10/14/1810/19/18

ASJC Scopus subject areas

  • Geophysics

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