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    Correcting for tool decentralization of oriented six-arm caliper logs for determination of contemporary tectonic stress orientation

    135033_18236_Wagner_et_al_2004_Petrophysics_Breakouts_from_6_arm_Caliper.pdf (799.9Kb)
    Access Status
    Open access
    Authors
    Wagner, D.
    Muller, B.
    Tingay, Mark
    Date
    2004
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Wagner, D. and Muller, B. and Tingay, M. 2004. Correcting for tool decentralization of oriented six-arm caliper logs for determination of contemporary tectonic stress orientation. Petrophysics. 45 (6): pp. 530-539.
    Source Title
    Petrophysics
    ISSN
    1529-9074
    Faculty
    Department of Applied Geology
    Faculty of Science and Engineering
    WA School of Mines
    Remarks

    Copyright Society of Petrophysics & Well Log Analysts.

    URI
    http://hdl.handle.net/20.500.11937/46971
    Collection
    • Curtin Research Publications
    Abstract

    Tool decentralization is a major problem in the analysis of six-arm caliper data, particularly in highly deviated wells. It precludes accurate determination of borehole geometry and hence, interpretation of borehole volume, stratigraphic horizons and present-day stress orientation. We test four methods for correcting tool decentralization of six-arm caliper data, for the primary purpose of interpreting present-day stress orientations from borehole breakouts. The ''chord approach'' and ''ellipse algorithm'' yielded the most accurate corrections for tool decentralization in real and modeled scenarios of breakouts, key-seats and in-gauge holes.

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