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    Laboratory measurements of seismic velocities of CO2/brine mixtures at elevated temperatures up to 70°C and pressures up to 38 MPa

    Access Status
    Fulltext not available
    Authors
    Bilenko, Olga
    Lebedev, Maxim
    Gurevich, Boris
    Date
    2013
    Type
    Conference Paper
    
    Metadata
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    Citation
    Bilenko, O. and Lebedev, M. and Gurevich, B. 2013. Laboratory measurements of seismic velocities of CO2/brine mixtures at elevated temperatures up to 70°C and pressures up to 38 MPa, in Theodoridis, J. (ed), Proceedings of the 23rd International Geophysical Conference and Exhibition: The Eureka Moment, Aug 11-14 2013. Melbourne, Vic: Australian Society of Exploration Geophysicists.
    Source Title
    ASEG Extended Abstracts 2013
    Source Conference
    23rd International Geophysical Conference and Exhibition.
    DOI
    10.1071/ASEG2013ab074
    School
    Department of Exploration Geophysics
    URI
    http://hdl.handle.net/20.500.11937/5255
    Collection
    • Curtin Research Publications
    Abstract

    Phase equilibrium of CO2-brine fluids is important to studies related to CO2 sequestration in deep saline aquifers and CO2 enhanced oil recovery. Furthermore, the study of the seismic properties of CO2 saturated and not saturated brines as pore fluids helps to understand their influence on the 4D seismic properties of rocks. In this work we reported results of measurements of the acoustic velocities in brines with dissolved CO2. We investigate the effects of pressure (from 2 MPa to 38 MPa), temperature (from 30 Ë?C to 70 Ë?C ), and salinity (0, 10,000ppm, 20,000ppm, 40,000ppm, 100,000ppm) of KCl-NaCl brines on ultrasonic velocities. We also study the time lapse effect of CO2 dissolution into the brine. It has been found that CO2 dissolution in brine has significantly changed acoustic properties of brine.

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