中国石油大学学报（自然科学版）2011，Vol.35Issue(3)：99-102,4.DOI:10.3969/j.issn.1673-5005.2011.03.020
低渗透油藏CO2混相驱油机制及影响因素
Mechanism of CO2 miscible displacement in low permeability reservoir and influencing factor
摘要
Abstract
According to the miscible mechanisms including CO2 reducing crude oil viscosity and mass transfer and diffusion of CO2 in crude oil, a mathematical model for CO2 miscible displacement with adsorption in low permeability reservoir was built.The process of CO2 miscible displacement was modeled.This model was solved numerically by Barakat-Clark finite difference scheme.The effects of Peclet number, injection gas pressure, porosity, crude oil viscosity on CO2 effluent concentration profile and viscosity break effect were analyzed.The results show that the decrease of Peclet number and the increase of injection gas pressure and porosity speed up CO2 breakthrough and the change of crude oil viscosity.In addition, the increase of crude oil viscosity makes the effect of CO2 reducing crude oil viscosity more obvious.关键词
低渗透油藏/CO2/混相驱/传质扩散/吸附Key words
low permeability reservoir/ CO2/ miscible displacement/ mass transfer and diffusion/ adsorption分类
能源科技引用本文复制引用
苏玉亮,吴晓东,侯艳红,侯照锋..低渗透油藏CO2混相驱油机制及影响因素[J].中国石油大学学报（自然科学版）,2011,35(3):99-102,4.基金项目
国家"973"重点基础研究发展规划项目(2006CB705804) （2006CB705804）
泰山学者建设工程专项项目(TS20070704) （TS20070704）
