摘要
为研究二氧化碳驱油藏中原油沥青质沉淀量预测方法,设计了二氧化碳非混相驱沥青质沉淀动态岩心驱替实验装置,采用正交实验分析方法研究了非混相驱条件下驱替压力、温度、岩心初始渗透率、原油中的沥青质含量和驱替速度等因素对驱替后岩心中原油沥青质沉淀量的影响,分析了作用机理,回归出了二氧化碳非混相驱过程中原油沥青质沉淀量预测公式并用实验结果进行了验证.验证结果表明,该预测公式可直接用于二氧化碳非混相驱原油沥青质沉淀量预测.
Oilfield practices indicate that carbon dioxide flooding may cause the precipitation of asphaltene,which will decrease the permeability of reservoir,the productivity of oil well and the result of reservoir development.Therefore,it is very important to understand the rules of asphaltene precipitation during carbon dioxide flooding.The effects of displacement pressure,temperature,original core permeability,original asphaltene content in crude oil and displacement rate on the precipitation amount of asphaltene are studied by self-designed experimental device and by means of orthogonal experiment method.The regression formula for calculating the precipitation amount of asphaltene is obtained,and it is verified by experimental results.The verified result shows that the regression formula can be used for predicting the precipitation amount of asphaltene in the immiscible displacement of carbon dioxide.
出处
《西安石油大学学报（自然科学版）》
CAS
北大核心
2011年第4期28-32,7,共5页
Journal of Xi’an Shiyou University（Natural Science Edition）
基金
中国石油科技创新基金研究项目"CO2驱油藏原油沥青质沉淀影响因素研究"(编号:2008D-5006-02-07)
关键词
二氧化碳驱油
沥青质沉淀
沥青质沉淀预测
carbon dioxide flooding
asphaltene precipitation
asphaltene precipitation prediction
