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 major types of the drainage volumes:
| Dynamic drainage volume | which is formed dynamically depending on the nearby well production and injection |
|---|---|
| Potential drainage volume | which can be formed in case a given well is working alone on the whole field (no interference with other wells) |
For homogeneous reservoir it can be estimated as:
V_e = A_e \, h_e \, \phi_e |
where
| effective formation thickness | |
| effective porosity | |
| drainage area |
Physics / Fluid Dynamics / Percolation
Petroleum Industry / Upstream / Subsurface E&P Disciplines / Field Study & Modelling / Drainage (fluid flow)
[ Drainage area (Ae) ] [ Drainage radius (re) ]