A property characterizing characterising agility of the the reservoir fluid under pressure gradient gradient and quantified as a ratio value of reservoir permeability by normalised by dynamic fluid viscosity:
| LaTeX Math Block |
|---|
|
M = \frac{k}{\mu} |
where
In multiphase flow the concept of total fluid mobility is not well-defined as phases may have different mobilities and flow quite independently from each other, having different pressures, moving at different velocities and segregated in space.
But in most popular case of a 3-phase Oil + Gas + Water fluid model with relatively homogeneous flow (phases may move at different velocities but occupy the same reservoir space and have the same pressure) the multi-phase mobility may be defined by Perrine model:
| LaTeX Math Block |
|---|
|
M = k_{air} \left[M_{rw} + \left( 1 + \frac{R_s \, B_g}{B_o} \right) \cdot M_{ro} + \left( 1 + \frac{R_v \, B_o}{B_g} \right) \cdot M_{rg} \right] |
| Excerpt Include |
|---|
| Multihase Fluid Mobility |
|---|
| Multihase Fluid Mobility |
|---|
| nopanel | true |
|---|
|
| LaTeX Math Inline |
|---|
| body | \displaystyle \Rightarrow |
|---|
|
| LaTeX Math Block |
|---|
|
\left<\frac{k}{\mu} \right> = k_{air} \left[ \frac{k_{rw}}{\mu_w} + \left( 1 + \frac{R_s \, B_g}{B_o} \right) \cdot \frac{k_{ro}}{\mu_o} + \left( 1 + \frac{R_v \, B_o}{B_g} \right) \cdot \frac{k_{rg}}{\mu_g} \right] |
...
...
| LaTeX Math Block |
|---|
|
M = k_{air} \left[ M_{rw} + M_{ro} \right] |
| LaTeX Math Inline |
|---|
| body | \displaystyle \Rightarrow |
|---|
|
...
...
See also
...
Physics / Fluid Dynamics / Percolation
Petroleum Industry / Upstream / Subsurface E&P Disciplines / Field Study & Modelling / [ Complex reservoir properties ] [ Basic diffusion model parameters ]
[ Petrophysics ] [ Basic reservoir properties ] [ Permeability ] [ Absolute permeability ] [Relative permeability] [ Wettability ] [ Phase mobility ] [ Relative phase mobilities ] [ Relative Reservoir Fluid Mobility ]
