Estimating a continuous P-wave velocity profile with constant squared-slowness gradient models from seismic field data

A. V. Ponomarenko, B. M. Kashtan, V. N. Troyan, W. A. Mulder

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

Abstract

We inverted seismic field data for a continuous, laterally invariant P-wave velocity profile. Instead of the usual approach that involves horizontal layers with piecewise constant densities and velocities, we consider models of one or two layers with a constant gradient of the squared slowness above a homogeneous halfspace. With a single layer above a halfspace, there are three parameters. With two layers, there are five. We solve the inverse problem by a direct grid search over a wide range of parameters. The results were compared to that of a piecewise-constant multi-layer inversion result. In the single-layer case, either the shallow or the deeper part of the model would match the multi-layer case, depending on which modes of the surface waves were selected. With two layers, a considerably better agreement is obtained over a larger depth range. Our method is limited to cases with a small Vs/Vp-ratio but has only 5 parameters. It could be a useful alternative to piecewise-constant multi-layer inversion, in particular if continuous P-velocity profiles are sought. These are sometimes better suited as a starting model for full waveform inversion than models with many discontinuities.

Original languageEnglish
Title of host publicationNear Surface Geoscience 2015 - 21st European Meeting of Environmental and Engineering Geophysics
PublisherEuropean Association of Geoscientists and Engineers
Pages661-665
Number of pages5
ISBN (Electronic)9781510814127
ISBN (Print)9781510814127
DOIs
StatePublished - 2015
Event21st European Meeting of Environmental and Engineering Geophysics, Near Surface Geoscience 2015: 21st European Meeting of Environmental and Engineering Geophysics - Turin, Italy
Duration: 6 Sep 201510 Sep 2015

Publication series

NameNear Surface Geoscience 2015 - 21st European Meeting of Environmental and Engineering Geophysics

Conference

Conference21st European Meeting of Environmental and Engineering Geophysics, Near Surface Geoscience 2015
CountryItaly
CityTurin
Period6/09/1510/09/15

Scopus subject areas

  • Geophysics
  • Geotechnical Engineering and Engineering Geology
  • Environmental Engineering

Fingerprint Dive into the research topics of 'Estimating a continuous P-wave velocity profile with constant squared-slowness gradient models from seismic field data'. Together they form a unique fingerprint.

Cite this