Quantitative Description of the Effects of Sweep Efficiency and Displacement Efficiency during Chemical Flooding on a Heterogeneous Reservoir

作     者：沈平平 袁士义 邓宝荣 宋杰 沈奎友 Shen Pingping;Yuan Shiyi;Deng Baorong;Song Jie;Shen Kuiyou

作者机构：中国石油勘探开发研究院中国北京100083 

出 版 物：《Petroleum Science》 (石油科学（英文版）)

年 卷 期：2004年第1卷第3期

页      面：41-48,77页

核心收录：

学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 

基　　金：This project is supported by the China National Key Basis Research Project (No: G1999022512) 

主　　题：Chemical flooding displacement efficiency sweep efficiency recovery efficiency heterogenous reservoir 

摘      要：The processes of flooding—water flooding, polymer flooding and ternary combination flooding—were simulated respectively on a 2-D positive rhythm profile geological model by using the ASP numerical modeling software developed by RIPED (Yuan, et al. 1995). The recovery coefficient, remaining oil saturation, sweep efficiency and displacement efficiency were calculated and correlated layer by layer. The results show that the sweep efficiency and displacement efficiency work different effects on different layers in the severely heterogeneous reservoir. The study shows that the displacement efficiency and sweep efficiency play different roles in different layers for severely heterogeneous reservoirs. The displacement efficiency contributes mainly to the high permeability zones, the sweep efficiency to the low permeability zones, both of which contribute to the middle permeable zones. To improve the sweep efficiency in the low permeability zones is of significance for enhancing the whole recovery of the reservoir. It is an important path for improving the effectiveness of chemical flooding in the severely heterogeneous reservoirs to inject ternary combination slug after profile control.