Monday, April 11, 2011

Fluid Flow in the Subsurface (Darcy's Law)

 from newly launched FracFocus : chemical registry site

Why Fluids Cannot migrate from the formations upwards:

The principle that governs how fluid moves in the subsurface is called Darcy's law.  Darcy’s law is an equation that defines the ability of a fluid to flow through a porous media such as rock.  It relies on the fact that the amount of flow between two points is directly proportional to the difference in pressure between the points and the ability of the media through which it is flowing to impede the flow.  This factor of flow impedence is referred to as permeability.  Put another way, Darcy's law is a simple, proportional relationship between the instantaneous discharge rate through a porous medium and the pressure drop over a given distance.
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