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    Coherent interferometry migration for hard rock diamond drill-bit seismic

    213417_135434_Coherent_Interferometry__BS_et_al.pdf (1.397Mb)
    Access Status
    Open access
    Authors
    Sun, Bai Chun
    Bóna, Andrej
    Zhou, B.
    King, A.
    Date
    2014
    Type
    Conference Paper
    
    Metadata
    Show full item record
    Citation
    Sun, B.C. and Bóna, A. and Zhou, B. and King, A. 2014. Coherent interferometry migration for hard rock diamond drill-bit seismic. SEG Technical Program Expanded Abstracts. 2014: pp. 2330-2334.
    Source Title
    SEG Technical Program Expanded Abstracts 2014
    Source Conference
    SEG International Exposition and 84th Annual Meeting
    DOI
    10.1190/segam2014-0743.1
    ISSN
    1949-4645
    School
    Department of Exploration Geophysics
    Remarks

    Copyright © 2014 Society of Exploration Geophysicists

    URI
    http://hdl.handle.net/20.500.11937/16091
    Collection
    • Curtin Research Publications
    Abstract

    We use the direct wave interferometry migration with coherency measurement to image the diamond drill-bit. The success of such imaging can prove if the direct waves from the drill-bit can be detected. The drilling signals usually contain strong narrow band interference noises. We suggest to use interferometry by deconvolution for migration, which widens the cross spectrum, hence the weak coherent features can be better observed. Additionally, we suggest to integrate coherent measurement of semblance or Multiple Signal Classification (MUSIC) into the algorithm in order to detect weak drill-bit signal. We test both methods with a synthetic and a diamond drill-bit seismic-while-drilling (SWD) field data. MUSIC coherency shows relatively better spatial resolution in contrast to semblance method. It also demonstrates better detectability of weak signal than summation and semblance. Our field SWD data also indicates that the interferometry migration can image the diamond drill-bit with appropriate survey parameters, and the MUSIC method achieves a high spatial resolution.

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