Influence of the outlet

The influence of the oulet is also investigated. Indeed, connexions between caves can be completly differente. Thus, it is important to see how the flow behaves for a different outlet.

Two positions are tested, with an outlet lenght of 0.05m. Then,  the size if the outlet is increased by two as it is shown in the pictures below. 

In these configurations, the inlet is the same used in the reference geometry.

Simulation parameters are listed in the table below:

  Velocity Inlet  Percentage of gaz injection  Percentage of oil recovered
Outlet 1  0.6 m/s 75% 68,5%
Outlet 2 0.6 m/s 75% 69%
Outlet 3 0.6 m/s 75% 70%

The graph below represents the percentage of oil in the domain in function of time. We can observe that after injecting 75% of gas in the domain, the quantity of oil remains constant: the oil recovery ratio is maximum. There is a maximum quantity of gas injected after which oil viscosity ratio can not be increased.

After an injection of 75% of nitrogen, the same amount of oil is recovered in the case of Outlet 1, 2 and 3 . Therefore, the size a,d the position of the injection well does not  influence the oil recovery ratio.