Comsol 5.1 gas flow porous
![comsol 5.1 gas flow porous comsol 5.1 gas flow porous](https://cdn.comsol.com/wordpress/2017/02/capillary-flow-through-a-porous-medium.jpg)
The remaining oil is highly dispersed in reservoirs with problems of low flooding efficiency and of severely ineffective cycles. The Saertu Oilfield of Daqing has entered ultrahigh water-cut stage of development. The content of remaining oil is lower with higher oil displacement efficiency. The remaining oil is mainly distributed in state of thin film on pore surface. More pores are swept by fluids with high sweep efficiency. The flow velocity declines quickly with a short duration of high pressure. The development of detour flows is weaker in large porous channels. By contrast, in the reservoir with weaker heterogeneity of grain size and throat (corresponding to low coordinate number), high flow velocities also develop in relatively narrower pore throats with little differentiation of flow velocities. The content of remaining oil is higher with lower oil displacement efficiency.
![comsol 5.1 gas flow porous comsol 5.1 gas flow porous](https://patentimages.storage.googleapis.com/pages/US2992065-0.png)
The microscopic remaining oil is mainly distributed in cluster state. Few pores are swept by injected fluids with low sweep efficiency. The flow velocity declines slowly with long duration of high pressure. The dominant passages are developed in high capacity channel, the detour flows are created in large porous channels, and the isolated islands are formed in small porous channels. Study results show that, in the reservoir with stronger heterogeneity of grain size and throat (corresponding to high coordinate number), high flow velocities tend to occur in relatively wider pore throats with great differentiation of flow velocities. The relationship between the remaining oil distribution and microscopic flow characteristics of fluid in the pores has been analyzed. Numerical simulation is applied in this paper to study characteristics of microscopic fluid velocity and flow pressures variation in the core pores in the Beier Area of Saertu Oilfield. The Saertu Oilfield of Daqing in northeast China has entered ultrahigh water-cut stage of development.