$4\mathrm{.}5\mathrm{.}2$ True$/$False

$4\mathrm{.}1$ Permeability is a measure of the flow capacity of a porous medium.

$4\mathrm{.}2$ The distribution of porosity is heterogeneous if porosity is the same everywhere in the reservoir.

$4\mathrm{.}3$ An oil$-$water transition zone is usually thicker than a gas$-$oil transition zone.

$4\mathrm{.}4$ Viscosity is used in Darcy's law.

$4\mathrm{.}5$ Interstitial velocity is less than superficial velocity.

$4\mathrm{.}6$ Bulk volume is the sum of grain volume and pore volume.

$4\mathrm{.}7$ The Dykstra$-$Parsons coefficient is dimensionless.

$4\mathrm{.}8$ The oil$-$water contact is usually found above the gas$-$oil contact in a reservoir with free gas, oil, and water.

$4\mathrm{.}9$ The value of permeability depends on the direction of fluid flow.

$4\mathrm{.}10$ Real gas pseudopressure has the unit of pressure, such as psia.