Changes

==Extension of Darcy's law==

==Extension of Darcy's law==

Darcy's law (see [[Laboratory methods]]), which was originally developed for water flow, has been extended to describe flow of hydrocarbon reservoir fluids (compressible and multiple phases).

Darcy's law, which was originally developed for water flow, has been extended to describe flow of hydrocarbon reservoir fluids (compressible and multiple phases).

For single-phase oil flow, the proportional constant that relates flow rates to pressure differences in the original Darcy's law is broken down into two independent factors: rock [[permeability]], ''k'', and fluid viscosity, μ For a linear flow system, this gives

For single-phase oil flow, the proportional constant that relates flow rates to pressure differences in the original Darcy's law is broken down into two independent factors: rock [[permeability]], ''k'', and fluid viscosity, μ For a linear flow system, this gives