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    The attenuation and dispersion analyses in porous and fractured medium with arbitrary fracture fill

    Access Status
    Fulltext not available
    Authors
    Kong, L.
    Gurevich, Boris
    Müller, T.
    Wang, Y.
    Yang, H.
    Date
    2013
    Type
    Conference Paper
    
    Metadata
    Show full item record
    Citation
    Kong, L. and Gurevich, B. and Müller, T. and Wang, Y. and Yang, H. 2013. The attenuation and dispersion analyses in porous and fractured medium with arbitrary fracture fill, in Proceedings of the 13th International Conference on Fracture, Jun 16-21 2013, pp. 2825-2834. Bejing, China: Chinese Society of Theoretical and Applied Mechanics.
    Source Title
    13th International Conference on Fracture 2013, ICF 2013
    School
    Department of Exploration Geophysics
    URI
    http://hdl.handle.net/20.500.11937/9530
    Collection
    • Curtin Research Publications
    Abstract

    To study the effect of fracture fill on the elastic anisotropy of the rock and frequency-dependent attenuation and dispersion in fractured reservoirs, a model for porous and fractured medium is developed. In this model, the fractured medium is considered as a periodic system of alternating layers of two types: Thick porous layers representing the background, and very thin and highly compliant porous layers representing fractures. By taking the simultaneous limits of zero thickness and zero normal stiffness of the thin layers, we obtain expressions for dispersion and attenuation of the P-waves. The results show that in the low-frequency limit the elastic properties of such a medium can be described by Gassmann equation with a composite fluid, while the P-wave speed is relatively high at high frequencies for two layers can be treated as 'hydraulically isolated'. However, there appears to be a critical case where no dispersion is observed, which is caused by the balance of fractures compliance and fluid compressibility filling in them.

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