Reservoir Rock - Fluid Flow in Porous
Media
flow behavior >>> Mathematical relationships (Q vs. Δp) have been developed to describe ____ of
reservoir fluids.
Fluid type, Reservoir geometry, Number of flowing fluids, Flow conditions >>> The fluid flow's
mathematical forms vary depending upon: ___, ___, ___, and ___
isothermal compressibility coefficient >>> The ____ is essentially the controlling factor in identifying
the type of the reservoir fluid.
Incompressible fluids, δV/δp = 0 or δρ/δp= 0, Slightly compressible fluids, Compressible fluids, δV/δp ≠ 0
or δρ/δp ≠ 0 >>> In general, reservoir fluids are classified into three groups: ___, ___, and ___
δV/δp = 0 or δρ/δp= 0 >>> Incompressible fluids
δV/δp ≠ 0 or δρ/δp ≠ 0 >>> Compressible fluids
Radial flow, linear flow, or spherical and hemispherical flow >>> The actual flow geometry may be
represented by: ___, ___, or ___
Radial flow >>> occurs between two concentric cylinders, well is inner cylinder and reservoir boundary
is outer cylinder.
Linear flow >>> the cross sectional area to flow must be constant. Flow occurs through a constant
cross-sectional
Spherical and hemispherical flow >>> flow with a limited perforated interval near the wellbore
mobile fluids >>> The mathematical expressions between Q and P vary in forms and complexity
depending upon the number of ____ in the reservoir.
Single-phase flow (oil, water, or gas), Two-phase flow (oil-water, oil-gas, or gas-water), Three-phase flow
(oil, water, and gas) >>> There are generally three cases of flowing systems: ___, ___, and ___
increases >>> The description of fluid flow and subsequent analysis of pressure data becomes more
difficult as the number of mobile fluids ____.
Steady-State >>> Pressure at every location in reservoir remains constant, i.e., does not change with
time, Same quantity of fluid enters flow system and leaves it.
, Steady-State >>> Only occurs when the reservoir is completely recharged and supported by strong
aquifer or pressure maintenance operations.
Unsteady (Transient) State >>> The rate of change of pressure with respect to time at any position is
not zero or constant, it is a function of both position i and time t.
Unsteady (Transient) State >>> Flow rate into an element of a porous media may not be the same as
the flow rate out of that element.
very large, constant >>> In the Unsteady (Transient) State, well is assumed to be located in a ____
reservoir and producing at a ____ flow rate.
pressure disturbance >>> In the Unsteady (Transient) State, production creates a ____ that travels
throughout this infinite-size reservoir.
no effect >>> For unsteady state, pressure disturbance does not reach reservoir boundaries and they
have ____ on pressure of the well.
Pseudosteady State >>> The pressure is declining linearly as a function of time, i.e., at a constant
declining rate.
declining linearly >>> In the Pseudosteady (semisteady/quasisteady) State, the pressure is ____ as a
function of time, i.e., at a constant declining rate.
Pseudosteady State >>> Flow rate into an element of a porous media may not be the same as the flow
rate out of that element. Well is assumed to be located in a very large reservoir and producing at a
constant flow rate. Production creates a pressure disturbance that travels throughout this infinite-size
reservoir.
pressure disturbance reaches reservoir boundaries >>> Once ____, unsteady-state ends and pseudo
steady state starts.
T >>> T/F: Boundaries have an effect on wellbore pressure.
Darcy's law of fluid flow >>> ____ states that rate of flow through a given rock varies directly with the
pressure applied, the area open to flow and varies inversely with the viscosity of the fluid flowing and
the length of the porous rock.
Directly, inversely >>> Darcy's law of fluid flow states that rate of flow through a given rock varies ____
with the pressure applied, the area open to flow and varies ____ with the viscosity of the fluid flowing
and the length of the porous rock.
permeability >>> In terms of equating the parameters, the constant of proportionality in Darcy's
equation is termed ____.
type of sand pack >>> In Darcy's one-dimensional empirical, The experimental variation was the ____,
permeability.
Media
flow behavior >>> Mathematical relationships (Q vs. Δp) have been developed to describe ____ of
reservoir fluids.
Fluid type, Reservoir geometry, Number of flowing fluids, Flow conditions >>> The fluid flow's
mathematical forms vary depending upon: ___, ___, ___, and ___
isothermal compressibility coefficient >>> The ____ is essentially the controlling factor in identifying
the type of the reservoir fluid.
Incompressible fluids, δV/δp = 0 or δρ/δp= 0, Slightly compressible fluids, Compressible fluids, δV/δp ≠ 0
or δρ/δp ≠ 0 >>> In general, reservoir fluids are classified into three groups: ___, ___, and ___
δV/δp = 0 or δρ/δp= 0 >>> Incompressible fluids
δV/δp ≠ 0 or δρ/δp ≠ 0 >>> Compressible fluids
Radial flow, linear flow, or spherical and hemispherical flow >>> The actual flow geometry may be
represented by: ___, ___, or ___
Radial flow >>> occurs between two concentric cylinders, well is inner cylinder and reservoir boundary
is outer cylinder.
Linear flow >>> the cross sectional area to flow must be constant. Flow occurs through a constant
cross-sectional
Spherical and hemispherical flow >>> flow with a limited perforated interval near the wellbore
mobile fluids >>> The mathematical expressions between Q and P vary in forms and complexity
depending upon the number of ____ in the reservoir.
Single-phase flow (oil, water, or gas), Two-phase flow (oil-water, oil-gas, or gas-water), Three-phase flow
(oil, water, and gas) >>> There are generally three cases of flowing systems: ___, ___, and ___
increases >>> The description of fluid flow and subsequent analysis of pressure data becomes more
difficult as the number of mobile fluids ____.
Steady-State >>> Pressure at every location in reservoir remains constant, i.e., does not change with
time, Same quantity of fluid enters flow system and leaves it.
, Steady-State >>> Only occurs when the reservoir is completely recharged and supported by strong
aquifer or pressure maintenance operations.
Unsteady (Transient) State >>> The rate of change of pressure with respect to time at any position is
not zero or constant, it is a function of both position i and time t.
Unsteady (Transient) State >>> Flow rate into an element of a porous media may not be the same as
the flow rate out of that element.
very large, constant >>> In the Unsteady (Transient) State, well is assumed to be located in a ____
reservoir and producing at a ____ flow rate.
pressure disturbance >>> In the Unsteady (Transient) State, production creates a ____ that travels
throughout this infinite-size reservoir.
no effect >>> For unsteady state, pressure disturbance does not reach reservoir boundaries and they
have ____ on pressure of the well.
Pseudosteady State >>> The pressure is declining linearly as a function of time, i.e., at a constant
declining rate.
declining linearly >>> In the Pseudosteady (semisteady/quasisteady) State, the pressure is ____ as a
function of time, i.e., at a constant declining rate.
Pseudosteady State >>> Flow rate into an element of a porous media may not be the same as the flow
rate out of that element. Well is assumed to be located in a very large reservoir and producing at a
constant flow rate. Production creates a pressure disturbance that travels throughout this infinite-size
reservoir.
pressure disturbance reaches reservoir boundaries >>> Once ____, unsteady-state ends and pseudo
steady state starts.
T >>> T/F: Boundaries have an effect on wellbore pressure.
Darcy's law of fluid flow >>> ____ states that rate of flow through a given rock varies directly with the
pressure applied, the area open to flow and varies inversely with the viscosity of the fluid flowing and
the length of the porous rock.
Directly, inversely >>> Darcy's law of fluid flow states that rate of flow through a given rock varies ____
with the pressure applied, the area open to flow and varies ____ with the viscosity of the fluid flowing
and the length of the porous rock.
permeability >>> In terms of equating the parameters, the constant of proportionality in Darcy's
equation is termed ____.
type of sand pack >>> In Darcy's one-dimensional empirical, The experimental variation was the ____,
permeability.
