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    A link between the pressure dependency of elastic and electrical properties of porous rocks

    Access Status
    Fulltext not available
    Authors
    Han, T.
    Gurevich, Boris
    Pervukhina, Marina
    Clennell, M.
    Date
    2016
    Type
    Conference Paper
    
    Metadata
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    Citation
    Han, T. and Gurevich, B. and Pervukhina, M. and Clennell, M. 2016. A link between the pressure dependency of elastic and electrical properties of porous rocks, in 78th EAGE Conference and Exhibition 2016: Efficient Use of Technology - Unlocking Potential, 30 May-2 June 2016, Vienna, Austria.
    Source Title
    78th EAGE Conference and Exhibition 2016: Efficient Use of Technology - Unlocking Potential
    ISBN
    9789462821859
    School
    Department of Exploration Geophysics
    URI
    http://hdl.handle.net/20.500.11937/54732
    Collection
    • Curtin Research Publications
    Abstract

    We present a technique to invert for the stiff and compliant porosity from velocity measurements made as a function of differential pressure on saturated sandstones. A dual porosity concept is used for dry rock compressibility and a squirt model is employed for the pressure and frequency dependent elastic properties of the rocks when saturated. The total porosity obtained from inversion shows satisfactory agreement with experimental results. The electrical cementation factor was determined using the inverted porosity in combination with measured electrical conductivity. It was found that cementation factor increased exponentially with increasing differential pressure during isostatic loading. Elastic compressibility, electrical cementation factor and electrical conductivity of the saturated rocks correlate linearly with compliant porosity, and electrical cementation factor and electrical conductivity exhibit linear correlations with elastic compressibility of the saturated rocks under loading. The results show that the dual porosity concept is sufficient to explain the pressure dependency of elastic, electrical and joint elastic-electrical properties of saturated porous sandstones.

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