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    Measurement of Supercritical Carbon Dioxide Capillary Trapping in Core Analysis

    Access Status
    Fulltext not available
    Authors
    Pentland, C.
    Iglauer, Stefan
    El-Maghraby, R.
    Okabe, H.
    Tsuchiya, Y.
    Blunt, M.
    Date
    2010
    Type
    Conference Paper
    
    Metadata
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    Citation
    Pentland, C.H. and Iglauer, S. and El-Maghraby, R. and Okabe, H. and Tsuchiya, Y. and Blunt, M.J. 2010. Measurement of Supercritical Carbon Dioxide Capillary Trapping in Core Analysis, SPE International Conference on CO2 Capture, Storage and Utilization, Nov 10 2010. New Orleans, USA: Society of Petroleum Engineers (SPE).
    Source Title
    SPE 138476
    Source Conference
    SPE International Conference on CO2 Capture, Storage & Utilization
    DOI
    10.2118/138476-MS
    School
    Department of Petroleum Engineering
    Remarks

    Copyright © 2010 Society of Petroleum Engineers (SPE)

    URI
    http://hdl.handle.net/20.500.11937/23493
    Collection
    • Curtin Research Publications
    Abstract

    Capillary trapping has been identified as a fast and effective method to render injected carbon dioxide (CO2) immobile as disconnected pore-scale droplets surrounded by brine. We measure trapped CO2 saturations in sandstones at conditions representative of storage locations. We compare the unsteady state and porous plate methods of achieving initial CO2 saturations before waterflooding to reach residual saturation. Brine and CO2 are equilibrated prior to injection to ensure immiscible displacements occur on the pore scale. The problems faced with un-equilibrated phases are discussed.The unsteady state and porous plate methods are shown to give different results in terms of maximum initial and residual saturations for Berea sandstone samples. With the unsteady state method maximum residual CO2 saturations of 25-28% are measured for corresponding maximum initial saturations of 35-40%. With the porous plate method a maximum residual saturation of 37% is measured for a maximum initial saturation of 90%. The implications for coreflood method selection during data gathering are discussed. The porous plate results are compared with oil-brine porous plate saturations measured on the same samples. CO2-brine residual saturations are shown to be slightly lower than the corresponding oil-brine measurements. We suggest that considerable carbon dioxide capillary trapping is possible in clean sandstones and discuss the implications for carbon storage in aquifers.

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