The Study of Effect of Pore Structure on Oil Displacement Efficiency of Polymer Flooding

• Published in: The open fuels & energy science journal 2016-09, Vol.9 (1), p.55-64
• Main Author: Wenguo, Ma
• Format: Article
• Language: English
• ISSN: 1876-973X; 1876-973X
• DOI: 10.2174/1876973X01609010055

Characteristics of pore structure have an important influence on the development of water flooding. In order to improve the recovery rate, it is important to investigate the relationship between pore structure and oil displacement efficiency. The permeability of the artificial cores in this experiment is 189×10 -3 μm 2 , 741×10 -3 μm 2 and 21417×10 -3 μm 2 . We used the CT technology method to scan the pore structure of the three cores, and did oil displacement experiment to investigate the effect of pore structure on the oil displacement efficiency. The result shows that the pore and throat common affect oil displacement efficiency: the bigger the pore and throat radius, the better is the oil displacement efficiency; the smaller the pore and throat radius, the worse is the oil displacement efficiency. The experiment studied the influence of pore structure on oil displacement efficiency deep into microcosmic pore structure without damaging the core skeleton, thereby improving the basis of oil recovery from the micro level and the mechanism.