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

Результат исследований: Публикации в книгах, отчётах, сборниках, трудах конференцийстатья в сборнике материалов конференциирецензирование

Аннотация

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.

Язык оригиналаанглийский
Название основной публикацииNear Surface Geoscience 2015 - 21st European Meeting of Environmental and Engineering Geophysics
ИздательEuropean Association of Geoscientists and Engineers
Страницы661-665
Число страниц5
ISBN (электронное издание)9781510814127
ISBN (печатное издание)9781510814127
DOI
СостояниеОпубликовано - 2015
Событие21st European Meeting of Environmental and Engineering Geophysics, Near Surface Geoscience 2015: 21st European Meeting of Environmental and Engineering Geophysics - Turin, Италия
Продолжительность: 6 сен 201510 сен 2015

Серия публикаций

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

конференция

конференция21st European Meeting of Environmental and Engineering Geophysics, Near Surface Geoscience 2015
СтранаИталия
ГородTurin
Период6/09/1510/09/15

Предметные области Scopus

  • Геофизика
  • Геотехническая инженерия и инженерная геология
  • Природообустройство

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