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    Design concept for implementation of a novel subsea gas dehydration process for a gas/condensate well

    192574_192574.pdf (3.149Mb)
    Access Status
    Open access
    Authors
    Parks, David
    Pack, David
    Date
    2013
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Parks, David and Pack, David. 2013. Design concept for implementation of a novel subsea gas dehydration process for a gas/condensate well. Journal of Petroleum Science and Engineering. 109: pp. 18-25.
    Source Title
    Journal of Petroleum Science and Engineering
    DOI
    10.1016/j.petrol.2013.08.011
    ISSN
    09204105
    Remarks

    NOTICE: this is the author’s version of a work that was accepted for publication in the Journal of Petroleum Science and Engineering. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in the Journal of Petroleum Science and Engineering, Vol.109, (2013). DOI: 10.1016/j.petrol.2013.08.011

    URI
    http://hdl.handle.net/20.500.11937/29129
    Collection
    • Curtin Research Publications
    Abstract

    Natural Gas usually contains significant quantities of water vapour, which must be removed for gas processing and transmission. Common allowable water content of transmission gas ranges from 4 to 7 pounds per MMSCF (64–112mg/m3). Failure to sufficiently reduce the water content can lead to condensation of liquid water and the formation and accumulation of gas hydrates into pipe blocking plugs. This is particularly important for subsea pipelines with the high pressure and low temperatures conditions that exposes the gas to hydrate formation conditions.To meet the demands of deeper and more remote reservoirs, subsea processing has been poised as one of the most potentially promising technology developments in the offshore development.A novel dehydration solution that is applicable for subsea installation has been designed and tested in the laboratories of Clean Gas Technology Australia department of Curtin University. The solution utilises the concepts of gas cooling through expansion and the controlled formation and management of gas hydrates to reduce the water content of a saturated gas stream to levels suitable for gas transport in subsea pipelines. The pilot plant implemented to test the solution design at pressures up to 10MPa (1469psi) and flow rates of 35m3/h (30MSCFD) demonstrated that dehydration performance better than achieved with batch experiments was achievable.This paper describes a design methodology to migrate the process to a subsea implementation and presents a model for a production implementation using the experimentally obtained dehydration performance, demonstrating that it can provide a viable subsea dehydration solution.

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