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    Modeling elastic wave velocities and attenuation in rocks saturated with heavy oil

    117635_8938_19GurevichOsypovCizMakarynska_Geophysics2008.pdf (274.5Kb)
    Access Status
    Open access
    Authors
    Gurevich, Boris
    Osypov, K.
    Ciz, Radim
    Makarynska, D
    Date
    2008
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Gurevich, Boris and Osypov, Konstantin and Ciz, Radim and Makarynska, Dina 2008. Modeling elastic wave velocities and attenuation in rocks saturated with heavy oil. Geophysics. 73 (4): pp. E115-E122.
    Source Title
    Geophysics
    DOI
    10.1190/1.2940341
    ISSN
    00168033
    Faculty
    Department of Exploration Geophysics
    Faculty of Science and Engineering
    The Western Australian School of Mines
    Remarks

    Published by the Society of Exploration Geophysicists.

    Copyright © 2008 Society of Exploration Geophysicists.

    The link to the journal’s home page is: http://segdl.aip.org/geophysics

    URI
    http://hdl.handle.net/20.500.11937/15630
    Collection
    • Curtin Research Publications
    Abstract

    Although properties of bulk heavy oil can be approximated by an appropriate viscoelastic model, only a few attempts to model properties of rocks saturated with heavy oil have been reported. Rock-physics models used for rocks saturated with conventional fluids are inapplicable to those saturated with heavy oil because its viscoelastic rheology invalidates the main assumptions of the Gassmann and Biot theories. We estimate viscoelastic properties of mixtures of rock and heavy oil by considering (1) a system of layers of a solid and a viscoelastic medium and (2) by computing Hashin-Shtrikman (HS) bounds for this system. These two methods give approximate bounds for the frequency- and temperature-dependent velocities and attenuation coefficients in rocks saturated with heavy oil. We also propose a method to compute a realistic estimate of these properties that lie between those bounds. This estimate is based on a self-consistent equivalent-medium approach known as coherent-potential approximation. In a more general form, this approximation can be used for approximate fluid substitution for heavy oil. This approach gives frequency-dependent velocities and attenuation values that are qualitatively consistent with experimental observa-tions.

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