QUART Flashcards
May be found using logs,
laboratory analysis, correlations,
isoporosity contour maps.
Porosity
A measure of rock capability to
transmit fluids.
Absolute Permeability
The directional trend of
permeabilities
Anisotropy-
It is the ratio of the effective
permeability of that phase to the
absolute permeability
Permeability
It may be input on per cell basis; or if it begins with
equilibrium conditions, it can be calculated using
density gradient adjusment for all cells.
Pressures
May be assigned to each cell if any given datum is
known (gas-oil contact and water-oil contact)
Saturations (So, Sw, Sg)
Dissolved gas is required as a function of
pressure and based on the pressure in each cell.
Solution gas-oil ratio (Rs)
– Gas which is released
from solution remains
in contact with the oil.
Flash Liberation
the free gas is
removed while
maintaining the
pressure
Differential Liberation
Below bubble point
pressure, a decreas in
Bo yields lesser
volume
Oil Formation Volume Factor
Above bubble point,
(in undersaturated) a
decrease in pressure
releases no solution
gas.
Oil Formation Volume Factor
increases with
decreasing
pressure due to
expansion.
Gas Formation Volume Factor
It is a reduction of flow capability due to the
presence of another fluid and is based on:
Relative Permeability
At the critical
(connate) water
saturation, the
water relative
permeability is
zero.
Water-Oil Relative Permeability
The ability of the fluid to coat the rock surface
Wettability
