Page 141 - Principles of Applied Reservoir Simulation 2E
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126 Principles of Applied Reservoir Simulation
Equations of state must be used to calculate equilibrium relations in a
compositional model. This entails tuning parameters such as EoS parameters
{a, b} in Table 13-3. Several regression techniques exist for tuning an EoS. They
usually differ in the choice of EoS parameters that are to be varied in an attempt
to match lab data with the EoS.
Pressure—^- Pressure—^- Pressure-
Figure 13-3. Gas phase properties.
Figures 13-3 and 13-4 show typical fluid property behavior of gas and
oil properties for a black oil model. Gas phase properties are gas formation
volume factor (B g), gas viscosity (fl g), and liquid yield (r s). Oil phase properties
are oil formation volume factor (5 0), oil viscosity (|I 0), and solution GOR (R so).
Saturated Undersaturated
A
B
Pressure
Figure 13-4. Oil phase properties.
