Impacts of pore size distribution on gas injection in intraformational water zones in oil sands reservoirs

被引:25
作者
Xu, Jinze [1 ,2 ,3 ]
Chen, Zhangxin [3 ]
Li, Ran [1 ,2 ,3 ]
机构
[1] Xian Shiyou Univ, Coll Petr Engn, Xian 710065, Shaanxi, Peoples R China
[2] Shaanxi Key Lab Adv Stimulat Technol Oil & Gas Re, Xian 710065, Shaanxi, Peoples R China
[3] Univ Calgary, Dept Chem & Petr Engn, Calgary, AB T2N 1N4, Canada
来源
OIL & GAS SCIENCE AND TECHNOLOGY-REVUE D IFP ENERGIES NOUVELLES | 2020年 / 75卷
基金
中国国家自然科学基金; 加拿大自然科学与工程研究理事会;
关键词
SAGD; STEAM;
D O I
10.2516/ogst/2020047
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
Intraformational water zones are widely reported in Canadian oil sands fields. In order to pressurize a thief zone, one of the initiatives is to inject gas. However, the evaluation of gas injectivity based on a pore size distribution is still a big challenge. This study provides a multi-scale approach to study the effect of a pore size distribution on gas injectivity in intraformational water zones. The results indicate the gas effective permeability increases in a less complex and more discrete pore network. The enhancement of gas effective permeability with increased gas saturation weakens with higher complexity and lower discreteness of a pore network. A less complex and more discrete pore network better benefits the gas injectivity index.
引用
收藏
页数:7
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