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    Estimation of Scattering Attenuation from Zero-offset VSP Data: CO2CRC Otway Project Case Study

    213408.pdf (254.8Kb)
    Access Status
    Open access
    Authors
    Galvin, R.
    Müller, T.
    Pevzner, Roman
    Gurevich, Boris
    Date
    2013
    Type
    Conference Paper
    
    Metadata
    Show full item record
    Citation
    Galvin, R. and Müller, T. and Pevzner, R. and Gurevich, B. 2013. Estimation of Scattering Attenuation from Zero-offset VSP Data: CO2CRC Otway Project Case Study, in Proceedings of the EAGE Workshop on Seismic Attenuation, Oct 28-30 2013. Singapore, Singapore: EAGE.
    Source Title
    Estimation of Scattering Attenuation from Zero-offset VSP Data: CO2CRC Otway Project Case Study
    Source Conference
    EAGE Workshop on Seismic Attenuation
    DOI
    10.3997/2214-4609.20131839
    ISSN
    08123985
    School
    Department of Exploration Geophysics
    URI
    http://hdl.handle.net/20.500.11937/41328
    Collection
    • Curtin Research Publications
    Abstract

    Seismic attenuation consists of anelastic absorption and scattering loss. Due to the dominance of stratification, the scattering attenuation in the sedimentary crust is dominated by 1-D scattering. In this study we applied an integrated workflow for estimation of attenuation from ZVSP and log data to a comprehensive dataset acquired at Otway basin. Both 1D reflectivity modeling and application of generalized O’Doherty-Anstey theory to the Otway log data shows that the 1-D scattering component of attenuation gives Q of over 200. At the same time, average Q estimated from field VSP data value is close to 60. Hence we conclude that scattering plays a relatively minor role in the study area. Further research is required to understand whether this conclusion holds in other areas. In particular, scattering attenuation might be larger in environments with larger variability of elastic properties between layers, such as in areas with laminated coal layers.

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