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    Simulation of wireline sonic logging measurements acquired with Borehole-Eccentered tools using a high-order adaptive finite-element method

    Access Status
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    Authors
    Pardo, D.
    Matuszyk, P.
    Muga, I.
    Torres-Verdín, C.
    Mora, A.
    Calo, Victor
    Date
    2011
    Type
    Journal Article
    
    Metadata
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    Citation
    Pardo, D. and Matuszyk, P. and Muga, I. and Torres-Verdín, C. and Mora, A. and Calo, V. 2011. Simulation of wireline sonic logging measurements acquired with Borehole-Eccentered tools using a high-order adaptive finite-element method. Journal of Computational Physics. 230 (16): pp. 6320-6333.
    Source Title
    Journal of Computational Physics
    DOI
    10.1016/j.jcp.2011.04.028
    ISSN
    0021-9991
    School
    Department of Applied Geology
    URI
    http://hdl.handle.net/20.500.11937/51580
    Collection
    • Curtin Research Publications
    Abstract

    The paper introduces a high-order, adaptive finite-element method for simulation of sonic measurements acquired with borehole-eccentered logging instruments. The resulting frequency-domain based algorithm combines a Fourier series expansion in one spatial dimension with a two-dimensional high-order adaptive finite-element method (FEM), and incorporates a perfectly matched layer (PML) for truncation of the computational domain. The simulation method was verified for various model problems, including a comparison to a semi-analytical solution developed specifically for this purpose. Numerical results indicate that for a wireline sonic tool operating in a fast formation, the main propagation modes are insensitive to the distance from the center of the tool to the center of the borehole (eccentricity distance). However, new flexural modes arise with an increase in eccentricity distance. In soft formations, we identify a new dipole tool mode which arises as a result of tool eccentricity. © 2011 Elsevier Inc.

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