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    Feasibility of Cross-well Seismic as CO2 Monitoring Tool

    Access Status
    Fulltext not available
    Authors
    Shulakova, V.
    Pevzner, Roman
    Gurevich, Boris
    Madadi, Mahyar
    Bona, Andrej
    Urosevic, Milovan
    Date
    2015
    Type
    Conference Paper
    
    Metadata
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    Citation
    Shulakova, V. and Pevzner, R. and Gurevich, B. and Madadi, M. and Bona, A. and Urosevic, M. 2015. Feasibility of Cross-well Seismic as CO2 Monitoring Tool, in Proceedings of the 77th EAGE Conference and Exhibition: VSP and Borehole Seismic, Jun 1-4 2015. Madrid: IFEMA.
    Source Title
    77th EAGE Conference and Exhibition 2015
    Source Conference
    77th EAGE Conference and Exhibition
    DOI
    10.3997/2214-4609.201413364
    School
    Department of Exploration Geophysics
    URI
    http://hdl.handle.net/20.500.11937/22182
    Collection
    • Curtin Research Publications
    Abstract

    The next stage of CO2CRC Otway project involves exploration of the ability of various CO2 geosequestration techniques, including cross-hole seismic, to detect and monitor presence of CO2. Despite the limited spatial coverage of a cross-well survey, the acquired data could be used to improve reliability of the whole monitoring and verification program. Prior to any field experiment we evaluate the feasibility of cross-well seismic using computer modelling. We utilize finite-difference time-domain (FDTD) method for pre- and post- injection stages. Here we present the results of our study and validate the detectability of CO2/CH4 gas mixture on time-lapse cross-well seismic data on the direct as well as the reflected wave fields. We demonstrate that the presence of 15,000 t of a gas plume can lead to changes in transit times of up to 1.4 ms (in cross-well setting). The computed seismic tomography detects the difference in velocities up to 80 m/s. The difference caused by gas is also detectable in the migrated time section of reflected waves.

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