摘要
对流扩散是由于物质微粒在运动的相内对流而产生的扩散，是分子扩散和弥散的综合现象。其中分子扩散是由于浓度差导致的质量传递，而弥散是由于在流道内或流道间速度的变化而导致的混合现象。介绍二氧化碳混相驱扩散渗流方程，给出扩散项的准确定义；分别对求解扩散渗流方程所需计算的分子扩散系数和物理弥散系数模型化研究的有关进展作回顾和评价；并介绍和评价有关基础数据的实验测定方法。
Convective diffusion is an overall mass transport phenomena in the moving phase, which is caused by the micro-particles convection including molecule diffusion and physical disperison. The molecular diffusion is the mass transfer caused by the concentration difference, while the physical dispersion is the mixing caused by the velocity difference of the fluids in a channel or in the different channels. In this paper, the equations of permeable fluid mechanics for carbon dioxide miscible flooding for enhancing crude oil recovery are derived at first, and then the accurate definition for the diffusion term in the equation are introduced, and finally, the researching progress for the molecular diffusion coefficients modelling are reviewed and evaluated.
出处
《石油勘探与开发》
EI
CAS
CSCD
北大核心
1996年第6期62-66,共5页
Petroleum Exploration and Development
基金
国家自然科学基金
关键词
混相驱油
对流扩散
油气藏
提高采收率
Miscible flooding, Convective, Diffusion, Molecular diffusion, Physical dispersion
