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    Compressible Flow

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    crown212
    The document discusses gas flow equations for a linear horizontal system. It explains that equations for liquid flow cannot be used due to gas being highly compressible. The derivation shows that Darcy's equation can be written in differential form and used to determine gas flow rate at reservoir conditions. Boyle's law is then applied to relate the reservoir flow rate to the flow rate at standard surface conditions. Approximations are used to solve the equation as viscosity and compressibility are strong functions of pressure.

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    Compressible Flow

    Uploaded by

    crown212
    72 views8 pages
    The document discusses gas flow equations for a linear horizontal system. It explains that equations for liquid flow cannot be used due to gas being highly compressible. The derivation shows that Darcy's equation can be written in differential form and used to determine gas flow rate at reservoir conditions. Boyle's law is then applied to relate the reservoir flow rate to the flow rate at standard surface conditions. Approximations are used to solve the equation as viscosity and compressibility are strong functions of pressure.

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    Compressible Flow

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    The document discusses gas flow equations for a linear horizontal system. It explains that equations for liquid flow cannot be used due to gas being highly compressible. The derivation shows that Darcy's equation can be written in differential form and used to determine gas flow rate at reservoir conditions. Boyle's law is then applied to relate the reservoir flow rate to the flow rate at standard surface conditions. Approximations are used to solve the equation as viscosity and compressibility are strong functions of pressure.

    Copyright:

    © All Rights Reserved
    Download as PPTX, PDF, TXT or read online from Scribd
    Download as pptx, pdf, or txt
    72 views8 pages

    Compressible Flow

    Uploaded by

    crown212
    The document discusses gas flow equations for a linear horizontal system. It explains that equations for liquid flow cannot be used due to gas being highly compressible. The derivation shows that Darcy's equation can be written in differential form and used to determine gas flow rate at reservoir conditions. Boyle's law is then applied to relate the reservoir flow rate to the flow rate at standard surface conditions. Approximations are used to solve the equation as viscosity and compressibility are strong functions of pressure.

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    © All Rights Reserved
    Download as PPTX, PDF, TXT or read online from Scribd
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    Compressible Flow

    gas is so highly compressible that equations for


    liquid flow cannot be used. Derivation of gas flow
    rate for a linear horizontal system follows. Darcys
    equation in differential form can be written as,

    Eng. Haitem Ben-Massud


    where q is the flow rate at reservoir
    conditions, rcf/d.
    Naturally, it is most desirable to determine gas
    flow rate at surface, or standard conditions in
    units of standard cubic feet per day (scf/d).
    Beginning with Boyle's law for a re For steady-
    state conditions, the flow rate in scf/d (qsc) is
    constant everywhere in the system at any
    pressure. al gas under isothermal conditions,

    Eng. Haitem Ben-Massud


    Eng. Haitem Ben-Massud
    Substituting for reservoir flow rate and separating variables

    Eng. Haitem Ben-Massud


    Note that viscosity and z-factor are strong
    functions of pressure; therefore to solve this
    Eq. two approximations were developed.
    In the low-pressure region (p < 2000 psi),
    z = constant and can be evaluated at average
    pressure (p1+p2)/2.

    Eng. Haitem Ben-Massud


    Eng. Haitem Ben-Massud
    Eng. Haitem Ben-Massud
    Eng. Haitem Ben-Massud

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