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    Effect of stress anisotropy on well productivity in unconventional gas reservoirs

    Access Status
    Fulltext not available
    Authors
    Minaein, V.
    Bahrami, H.
    Hossain, Mofazzal
    Jamili, A.
    Asadi, M.
    Rezaee, M. Reza
    Date
    2013
    Type
    Conference Paper
    
    Metadata
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    Citation
    Minaein, V. and Bahrami, H. and Hossain, M. and Jamili, A. and Asadi, M. and Rezaee, M.R. 2013. Effect of stress anisotropy on well productivity in unconventional gas reservoirs, in Proceedings of the Society of Petroleum Engineers (SPE) Production and Operations Symposium, 23-26 March 2013, pp. 649-658. Oklahoma City, Oklahoma, USA: SPE.
    Source Title
    SPE Production and Operations Symposium, Proceedings
    DOI
    10.2118/164521-MS
    ISBN
    9781627481670
    School
    Department of Petroleum Engineering
    URI
    http://hdl.handle.net/20.500.11937/4301
    Collection
    • Curtin Research Publications
    Abstract

    Relative magnitude of in-situ stresses and their direction can control production performance of non-fractured and hydraulically fractured horizontal wells in unconventional gas reservoirs. The in-situ stresses influence wellbore instability, hydraulic fractures propagation, reservoir permeability anisotropy, and direction of gas flow in the reservoir. This paper presents the evaluation of the factors associated with horizontal stress anisotropy that control production performance in tight gas, shale gas, and coal bed methane reservoirs with normal faulting stress regime. Rock mechanical modeling and reservoir simulation are carried out based on the typical data from a West Australian unconventional gas reservoir, in order to understand the effect of stress anisotropy on permeability anisotropy and well productivity for difference cases of non-fractured and hydraulically fractured horizontal wells. The study results highlight the significance of well completion system, horizontal well orientation, and direction of in-situ horizontal stresses in controlling well productivity. In non-fractured or hydraulically fractured wells, production performance may noticeably be different when horizontal wellbore orientation is parallel or perpendicular to the maximum horizontal stress direction. Understandings of these factors are vital in designing the well completion and stimulation strategy that ensures maximum well productivity.

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