Simulation of two-phase flow in horizontal fracture networks with numerical manifold method

G. W. Ma, H. D. Wang, L. F. Fan, B. Wang

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    Abstract

    The paper presents simulation of two-phase flow in discrete fracture networks with numerical manifold method (NMM). Each phase of fluids is considered to be confined within the assumed discrete interfaces in the present method. The homogeneous model is modified to approach the mixed fluids. A new mathematical cover formation for fracture intersection is proposed to satisfy the mass conservation. NMM simulations of two-phase flow in a single fracture, intersection, and fracture network are illustrated graphically and validated by the analytical method or the finite element method. Results show that the motion status of discrete interface significantly depends on the ratio of mobility of two fluids rather than the value of the mobility. The variation of fluid velocity in each fracture segment and the driven fluid content are also influenced by the ratio of mobility. The advantages of NMM in the simulation of two-phase flow in a fracture network are demonstrated in the present study, which can be further developed for practical engineering applications.

    LanguageEnglish
    Pages293-309
    Number of pages17
    JournalAdvances in Water Resources
    Volume108
    DOIs
    StatePublished - 1 Oct 2017

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    fracture network
    two phase flow
    numerical method
    fluid
    simulation
    finite element method
    analytical method
    engineering

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    @article{469fe04f06314297873afe8432ee5232,
    title = "Simulation of two-phase flow in horizontal fracture networks with numerical manifold method",
    abstract = "The paper presents simulation of two-phase flow in discrete fracture networks with numerical manifold method (NMM). Each phase of fluids is considered to be confined within the assumed discrete interfaces in the present method. The homogeneous model is modified to approach the mixed fluids. A new mathematical cover formation for fracture intersection is proposed to satisfy the mass conservation. NMM simulations of two-phase flow in a single fracture, intersection, and fracture network are illustrated graphically and validated by the analytical method or the finite element method. Results show that the motion status of discrete interface significantly depends on the ratio of mobility of two fluids rather than the value of the mobility. The variation of fluid velocity in each fracture segment and the driven fluid content are also influenced by the ratio of mobility. The advantages of NMM in the simulation of two-phase flow in a fracture network are demonstrated in the present study, which can be further developed for practical engineering applications.",
    keywords = "Discrete fracture network, Moving boundary, Numerical manifold method, Two-phase flow",
    author = "Ma, {G. W.} and Wang, {H. D.} and Fan, {L. F.} and B. Wang",
    year = "2017",
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    Simulation of two-phase flow in horizontal fracture networks with numerical manifold method. / Ma, G. W.; Wang, H. D.; Fan, L. F.; Wang, B.

    In: Advances in Water Resources, Vol. 108, 01.10.2017, p. 293-309.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Simulation of two-phase flow in horizontal fracture networks with numerical manifold method

    AU - Ma,G. W.

    AU - Wang,H. D.

    AU - Fan,L. F.

    AU - Wang,B.

    PY - 2017/10/1

    Y1 - 2017/10/1

    N2 - The paper presents simulation of two-phase flow in discrete fracture networks with numerical manifold method (NMM). Each phase of fluids is considered to be confined within the assumed discrete interfaces in the present method. The homogeneous model is modified to approach the mixed fluids. A new mathematical cover formation for fracture intersection is proposed to satisfy the mass conservation. NMM simulations of two-phase flow in a single fracture, intersection, and fracture network are illustrated graphically and validated by the analytical method or the finite element method. Results show that the motion status of discrete interface significantly depends on the ratio of mobility of two fluids rather than the value of the mobility. The variation of fluid velocity in each fracture segment and the driven fluid content are also influenced by the ratio of mobility. The advantages of NMM in the simulation of two-phase flow in a fracture network are demonstrated in the present study, which can be further developed for practical engineering applications.

    AB - The paper presents simulation of two-phase flow in discrete fracture networks with numerical manifold method (NMM). Each phase of fluids is considered to be confined within the assumed discrete interfaces in the present method. The homogeneous model is modified to approach the mixed fluids. A new mathematical cover formation for fracture intersection is proposed to satisfy the mass conservation. NMM simulations of two-phase flow in a single fracture, intersection, and fracture network are illustrated graphically and validated by the analytical method or the finite element method. Results show that the motion status of discrete interface significantly depends on the ratio of mobility of two fluids rather than the value of the mobility. The variation of fluid velocity in each fracture segment and the driven fluid content are also influenced by the ratio of mobility. The advantages of NMM in the simulation of two-phase flow in a fracture network are demonstrated in the present study, which can be further developed for practical engineering applications.

    KW - Discrete fracture network

    KW - Moving boundary

    KW - Numerical manifold method

    KW - Two-phase flow

    UR - http://www.scopus.com/inward/record.url?scp=85028599394&partnerID=8YFLogxK

    U2 - 10.1016/j.advwatres.2017.08.013

    DO - 10.1016/j.advwatres.2017.08.013

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    EP - 309

    JO - Advances in Water Resources

    T2 - Advances in Water Resources

    JF - Advances in Water Resources

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    ER -