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    Monitoring CO2 injection into a saline aquifer: Otway Project feasibility study

    Access Status
    Fulltext not available
    Authors
    Pevzner, Roman
    Galvin, R.
    Madadi, Mahyar
    Urosevic, Milovan
    Caspari, Eva
    Gurevich, Boris
    Lumley, D.
    Shulakova, V.
    Cinar, Y.
    Tcheverda, V.
    Date
    2012
    Type
    Conference Paper
    
    Metadata
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    Citation
    Pevzner, Roman and Galvin, Robert J. and Madadi, Mahyar and Urosevic, Milovan and Caspari, Eva and Gurevich, Boris and Lumley, David et al. 2012. Monitoring CO2 injection into a saline aquifer: Otway Project feasibility study, in Proceedings of the Annual Meeting of the Society of Exploration Geophysicists (SEG), Nov 4-9 2012. Las Vegas: SEG.
    Source Title
    SEG Technical Program Expanded Abstracts
    Source Conference
    SEG/Las Vegas 2012
    DOI
    10.1190/segam2012-0405.1
    ISSN
    1052-3812
    URI
    http://hdl.handle.net/20.500.11937/28502
    Collection
    • Curtin Research Publications
    Abstract

    A key objective of Stage 2 of the CO2CRC Otway Project is to explore the ability of geophysical methods to detect and monitor injection of greenhouse gas into a saline formation. For this purpose, injection of some 10,000 – 30,000 t of gas mixture (80/20% CO2/CH4 by mole fraction in the supercritical state) into the Paaratte formation, a saline aquifer located at a depth of about 1,400 m is planned. Before such an injection experiment is undertaken, we assess the feasibility of geophysical monitoring using computer modeling. To examine the detectability of the plume we need to estimate the time-lapse signal and time-lapse noise. The time lapse signal is modeled using flow simulations, fluid substitution and seismic forward modeling. The level of time lapse noise is estimated from existing time-lapse 3D data in the area. The results confirm that the plume stemming from the injection of 10,000 t of CO2 / CH4 will probably be detectable, and that an increase of the injection volume to 30,000 t will give a significantly higher confidence of the plume detection.

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