改进的CO_2驱相对渗透率模型及其应用  

An improved relative permeability model and its application for CO_2 injection EOR process

作　　者：任闽燕[1,2] 王珍[1,3] 徐阳[4] 牛保伦[1] 贾英良[1] 李兆敏[1] 任韶然[1] 

机构地区：[1]中国石油大学石油工程学院,山东青岛266555 [2]中石化胜利油田技术发展部,山东东营257000 [3]中石化胜利油田钻井技术研究院,山东东营257000 [4]中石化国际石油勘探开发有限公司,北京100083

出　　处：《中国石油大学学报（自然科学版）》2011年第4期108-112,共5页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家'973'研究课题(2006CB705805);山东省自然科学基金项目(2006ZRA05096)

摘　　要：在现有相渗模型的基础上,考虑CO2与原油的相互作用,提出一种改进的CO2驱多相相对渗透率模型,采用气液相渗指数与驱替压力或当前油藏压力相关联的方法,研究CO2与原油间的相互作用对相态、流态和原油采收率的影响。利用改进的相渗模型对室内试验和现场CO2驱的效果进行数模拟合和验证。结果表明,改进的CO2驱相渗模型提高了油藏数值模拟的精度,特别适用于CO2近混相驱过程,室内试验和现场CO2驱的拟合效果较好。An improved multi-phase relative permeability model for CO2 flooding was presented based on the Corey model by considering the interaction of CO2 and oil and its effect on oil displacement efficiency.By combining the gas-liquid relative permeability index with the displacement pressure or present reservoir pressure,the influences of CO2-oil interaction on phase behavior,flow pattern and oil recovery factor were researched.The model was used to simulate different CO2 injection processes in a low permeability reservoir.The results show that the improved model can increase the precision of reservoir simulation,especially suitable for the process of near-miscible CO2 flooding.Good simulation results for both laboratory experiments and field prediction were obtained.

关 键 词：二氧化碳 混相驱 驱替试验 相对渗透率 Corey模型 

分 类 号：TE357.4[石油与天然气工程—油气田开发工程]