The area around a producing or injecting injecting well where reservoir fluid is made forced moving by the well operation.
In other words, the area, wehre resevroir fluid is where reservoir fluid is moving along the streamlines which either stem from injecting well or end up at producing well or steam from injecting well..
For homogeneous reservoir it can be estimated as:
| LaTeX Math Block | ||||
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A_e = \frac{V_e}{h_e \ \phi_e} |
where
| drainage volume | ||||
| effective formation thickness | ||||
| effective porosity |
It is often related to drainage radius
| LaTeX Math Inline | ||
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| LaTeX Math Block | ||||
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A_e = \pi \, r_e^2 |
which can be is misnomer for other shapes of drainage area.
See also
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Physics / Fluid Dynamics / Percolation
Petroleum Industry / Upstream / Subsurface E&P Disciplines / Field Study & Modelling / Drainage (fluid flow)
[ Drainage volume Ve ] [ Drainage radius (re) ]