Four Phase Flow in Gas Injection
Seyed Ali Feizabadi
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Supervisor: Prof. Zhangxing (John) Chen
The presence of four-phase flow has been acknowledged in numerous papers available in the literature on oil recovery by gas injection. The existence of four phases behavior presents two complexities, one associated with the flash calculation of the phase compositions and the other associated with assigning values of relative permeabilities to model the flow behavior of this system. In multiphase flow behavior, the saturation, saturation history and the flow properties of each phase affect the values of that of the other phases.
It seems that lumping would be a good alternative to treat the four-phase flow for example as a combination of two three phase flow Fluid distribution on a pore scale and the connectivity of the fluids plays the most important role in relative permeability model.
Currently it is common to include mechanical dispersion in solvent simulations. Mechanical dispersion can be viewed as a fudge factor that allows more solvent movement within the simulator than Darcy’s law will allow, so we have to modify the transmissibility in such a way that the thin mixture zone could be seen in a large grid block.