PVT
GAP offers full PVT description flexibility to accurately predict both pressure and saturation changes throughout the system. Accurate PVT descriptions are critical as the data are used to calculate the evolving fluid properties as pressure and temperature changes through the production path.
GAP offers two options for calculating the required fluid properties:
Black Oil
Where the PVT of the fluids in the system will either come from the MBAL reservoirs (in forecast mode) or from the IPR inputs (in solve network mode).
Compositional
Where the full Equation of State description of the fluid is available and all the PVT can be obtained from a Peng-Robinson or an SRK description of the fluid phase behaviour.
Compositional Tracking
GAP's PVT flexibility also offers Compositional Tracking to understand the evolving fluids composition through the given production system. The composition is flashed and mixed at each node in the system.
Compositional tracking uses a characterized Equation of State that is tracked from the MBAL reservoir elements through the production and injection systems.
Compositional tracking provides a less CPU intensive EOS alternative modelling technique. The composition is flashed and mixed at each node in the system and the pressure loss calculations are done using a black oil PVT for increased calculation performance. The evolved separator composition may for example be passed to a dynamically linked process simulator ensuring fluid transfer continuity.
