Total open pore volume around the well where reservoir flow is initiated by production or injection from a given well or group of wells.
There are two three major types of the drainage volumes:
| Dynamic drainage volume of a well | which is formed dynamically depending on the nearby well production and injection |
|---|---|
| Potential drainage volume of a well | which can be formed in case a given well is working alone on the whole field (no interference with other wells) |
| Jointly drained volume of a group of wells | which is formed dynamically by production and injection of all wells |
For homogeneous reservoir it can be estimated as:
| LaTeX Math Block | ||||
|---|---|---|---|---|
| ||||
V_e = A_e \, h_e \, \phi_e |
where
| effective formation thickness | ||||
| effective porosity | ||||
| drainage area |
See also
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Physics / Fluid Dynamics / Percolation
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