科研之友
微信
新浪微博
Facebook
分享链接
摘要
Low-salinity waterflooding (LSW) is popular in the oil industry worldwide due to its improved enhanced oil recovery performance, simple operation and environmental protection. However, the mechanisms underlying LSW are still being debated. To construct an analytical model which can interpret the LSW mechanism has been a big challenge. In this paper, we will combine several mechanisms to construct an analytical model and obtain a solution for LSW. After excellent validation with the experimental data, we propose several conclusions based on our model: (1) LSW can increase oil recovery and slow down the breakthrough of water at the beginning of field development and after conventional waterflooding; (2) the injection velocity of low-salinity water should be controlled within the proposed range in order for the clay cake to form. For a reservoir with a larger porosity, it is easier to operate the injection velocity; (3) lower salinity will lead to a higher water recovery factor due to the reduction of residual oil saturation; (4) the water saturation of the oil bank will become lower with a higher formation damage factor.
- 出版日期2018-8
- 单位东北石油大学
