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    Brittleness of gas shale reservoirs: A case study from the north Perth basin, Australia

    239954_239954.pdf (1.940Mb)
    Access Status
    Open access
    Authors
    Gholami, Raoof
    Rasouli, V.
    Sarmadivaleh, M.
    Minaeian, V.
    Fakhari, N.
    Date
    2015
    Type
    Journal Article
    
    Metadata
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    Citation
    Gholami, R. and Rasouli, V. and Sarmadivaleh, M. and Minaeian, V. and Fakhari, N. 2015. Brittleness of gas shale reservoirs: A case study from the north Perth basin, Australia. Journal of Natural Gas Science & Engineering. 33: pp. 1244-1259.
    Source Title
    Journal of Natural Gas Science & Engineering
    DOI
    10.1016/j.jngse.2016.03.013
    ISSN
    1875-5100
    School
    Curtin Sarawak
    URI
    http://hdl.handle.net/20.500.11937/33068
    Collection
    • Curtin Research Publications
    Abstract

    Shale reservoirs have gained the attention of many in recent years due to their potential as a major gas resource. Production from this kind of formation, however, requires an accurate estimation of brittleness and employments of hydraulic fracturing. There have been many studies as to how brittleness can be estimated, but few research works were carried out so far indicating how brittleness indices vary in gas shale formations. The aim of this paper is to evaluate the variation of brittleness in one of the gas shale reservoirs located in the north Perth Basin of Australia. The results obtained indicated that the lower part of the Carynginia shale should be selected for a hydraulic fracturing job due to a high brittleness index, although a careful analysis of Total Organic Content (TOC) might be required before initiating any plans. The mineralogical report and interpretations revealed that the space created by cross-plotting the elastic parameters is able to identify dominant minerals contributing into brittleness. Performing a series of true triaxial tests, which are capable of simulating the real field condition by applying three independent principal stresses, implied that as the stress anisotropy increases, a transition takes place from brittle towards the ductile behaviours. However, when this anisotropy becomes significant, samples regain their strength. This study, therefore, recommends more studies to get a practical conclusion on brittleness under true triaxial conditions.

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