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The area around a producing or injecting well where reservoir fluid is forced moving by the well operation.


In other words, the area, where
reservoir fluid is moving along the streamlines which either stem from injecting well or end up at producing well.


For 
homogeneous reservoir it can be estimated as:

(1) A_e = \frac{V_e}{h_e \ \phi_e}

where

V_e

drainage volume

h_e = \rm const

effective formation thickness

\phi_e = \rm const

effective porosity


It is often related to drainage radius r_e as:

(2) A_e = \pi \, r_e^2

which can be is misnomer for other shapes of drainage area.

See also


Physics /  Fluid Dynamics / Percolation

Petroleum Industry / Upstream / Subsurface E&P Disciplines / Field Study & Modelling / Drainage (fluid flow)

[ Drainage volume Ve ] [ Drainage radius (re) ]


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