The Open Fuels & Energy Science Journal

2016, 9 : 55-64
Published online 2016 September 28. DOI: 10.2174/1876973X01609010055
Publisher ID: TOEFJ-9-55

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

Ma Wenguo, *

* Address correspondence to this author at the Northeast Petroleum University, No. 199 Fa Zhan Road, High-Tech district, DaQing, Heilongjiang Province, China; Tel: +8613946947225; Fax: +864596803482; E-mail: mawenguo110@163.com

ABSTRACT

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 189×10-3μm2, 741×10-3μm2and 21417×10-3μm2. 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.

Keywords:

CT technology method, Oil displacement efficiency, Polymer flooding, Pore structure.