For constant capillar pressure function the saturation is
determined by cell depths:
Sg_max, Sw_min
----- goc ----
Sg_min, Sw_min
----- woc ----
Sg_min, Sw_max
The pvt interface is extended to handle wet-gas systems:
1. rvSat is added as a function in the PVT interface
2. SinglePvtLiveGas computes the pvt values and its derivatives
3. The old rbub variable is changed to rsSat for clearity
4. The new interface is tested in test_blackoilfluid with data from
liveoil.DATA and wetgas.DATA
Functions for volume factor and viscosity that explicitly take a boolean
variable indicating whether the fluid is saturated or not is added to
the SinglePvtInterface.
Corresponding changes are done in the dependent PVT files.
The new functionality is tested in test_blackoilfluid
The second input of initBlackoilStateFromDeck that computes surface
volumes based on gas/oil ratio is changed from
BlackoilPropertiesInterface to Props. To avoid duplication with the old
initBlackoilStateFromDeck its name is changed to
initBlackoilSurfvolUsingRS.
Add new function is added that computes saturation from surface volumes
solving z = As for each cell. This function is used to compute an
intial guess to the saturations in initState_impl.hpp.
The calculated gas resolution factor is compared to
the tabulated resolution to check wether the oil is saturated
or not. The new test judges equality as saturated. This
is cruscial as the gas resolution is set to equal the tabulated value
for the saturated case in the appleyard process.
The relperm of water and gas is now evaluated at the water and gas
saturation, respectivly. The relperm of oil is still a combination of
the the 2p relperm of water/oil and oil/gas.
Tor Harald Sandve