...
- tubing head pressure which is set by gathering system or injection pump
- wellbore design
- pump characterisits
- fluid friction with tubing /casing walls
- interfacial phase slippage
- heat exchange between wellbore fluid and surrounding rocks
The
-phase flow fraction ( also called phase cut or input hold-up or no-slip hold-up ) is defined as:| LaTeX Math Block |
|---|
|
\gamma_\alpha = \frac{q_\alpha}{q_t} |
where
– volumetric flow rate of -phase and is the total volumetric fluid production rate:| LaTeX Math Block |
|---|
|
q_t = \sum_\alpha q_\alpha |
The multiphase wellbore flow assumes that every phase occupies its own area of the total cross-sectional area of the lifting pipe.
...
