注CO_2驱替物理模拟相似准则  

Similarity criterion of physical simulation for CO_2 flooding

作　　者：何应付[1] 高慧梅[1] 

机构地区：[1]中国石化勘探开发研究院,北京100083

出　　处：《中国海上油气》2016年第1期75-79,共5页China Offshore Oil and Gas

基　　金：国家自然科学基金"核磁共振技术研究裂缝性致密油藏注二氧化碳提高采收率机理(编号:51504283)"部分研究成果

摘　　要：相似准则是室内物理模拟的理论基础,对油藏工程分析和研究也具有重要意义,而目前针对注CO2驱替相似准则的研究尚不多见。本文考虑了注CO2过程中的扩散特征,建立了CO2驱组分数学模型,应用方程分析法推导了控制方程的无量纲形式,获得了注CO2驱物理模拟的相似准则,共21个相似准则数,主要包括几何相似、组分及状态相似、扩散相似、非均质性相似及流度比、重力数、密度数和毛管数等。利用数值模拟方法对相似准则进行了检验,结果表明本文建立的相似准则能够用于指导CO2驱的物理模拟研究。Similarity criterion is the theoretical basis for reservoir engineering. Presently, the similarity of laboratory physical simulation and has great significance criterion of physical simulation for CO2 flooding is few. In this paper, a mathematical model considering dispersion of CO2 flooding is established and its dimensionless mathematical equation is derived by equation analysis method. The similarity criterion of physical simulation for CO2 flooding containing twenty-one scaling groups are derived which include geometric similarity, composi- tion and state similarity, dispersion similarity, heterogeneity similarity, mobility ratio, gravity number, densi- ty number and capillary number etc. This method is validated by compared with numerical simulation. Results show that the established similarity criterion can guide physical simulation of CO2 flooding.

关 键 词：CO2驱 扩散 数学模型 物理模拟 相似准则 

分 类 号：TE341[石油与天然气工程—油气田开发工程]