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Darcy (unit)
A
darcy
(or
darcy unit
) and
millidarcy
(md or mD) are
units
of
permeability
, named after
Henry Darcy
. They are not
SI units
, but they are widely used in
petroleum engineering
and
geology
. Like some other measures of permeability, a darcy has
dimensional units
in
length
².
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