Efficiency of CO2 storage in a domed structure

Gillian Elizabeth Pickup, Min Jin, Eric James Mackay, J.D.O. Williams, M.S. Bentham

    Research output: Contribution to conferencePaper

    Abstract

    When storing CO2 in a saline aquifer, it is desirable to have a structural trap, such as a domed closure, to limit the lateral migration of CO2. Domed structures may be formed in sandstone formations by migration of underlying salt bodies (halokinesis). In this study, we have created such a model of a hypothetical storage site in a domed structure, based on a real formation, using existing geological and petrophysical data. CO2 storage was simulated using the Eclipse 300 simulator with the CO2STORE module. Injection was initially controlled by rate, but was constrained by pressure build-up in the injection wells and at the crest of the dome. In additional, we monitored migration of CO2 past the dome spill point. A base case model was simulated and the a range of sensitivity cases investigated including the effect of aquifer size and heterogeneity. The results are very sensitive to boundary conditions. Notably, if the reservoir is open, the capacity may be limited due to migration across the spill point. The storage capacity also depends on reservoir heterogeneity, particularly if there are extensive layers of low permeability.
    Original languageEnglish
    Pages1-3
    Number of pages3
    Publication statusPublished - Mar 2012
    Event3rd EAGE CO2 Geological Storage Workshop 2012 - Edinburgh, United Kingdom
    Duration: 26 Mar 201227 Mar 2012

    Conference

    Conference3rd EAGE CO2 Geological Storage Workshop 2012
    CountryUnited Kingdom
    CityEdinburgh
    Period26/03/1227/03/12

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