The surface contact area between the well and reservoir.
In non-fractured wells this would be the well walls.
In fractured reservoir this would be the fracture faces contacting the reservoir.
See also
The Well-Reservoir Contact (WRC) is closely related to the concepts of Mechanical Skin-factor and Geometrical Skin-factor.
See Also
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Petroleum Industry / Upstream / Well
[ Reservoir ] [ Skin-factor (mechanical) ] [ Skin-factor (geometrical) ]