中文摘要：

优先流现象是油藏多孔介质油气渗流过程中的一种常见现象,它是多孔介质内渗流过程由均质走向非均质、由平衡走向非平衡的标志。目前油气渗流过程优先流现象研究的不够深入,还没有真正的定义。本文结合国内外相关研究成果,提出了油藏多孔介质油气渗流过程的优先流现象定义,对优先流类型及现象表述、目前的研究方法、存在问题及今后研究方向等进行了探讨,为今后精确描述油气渗流过程提供了理论依据。

英文摘要：

is a phenomenon in oil gas seepage process of reservoir porous medium. It is a trend mark of seepage process in porous medium which has been transformed from homogeneous to heterogeneous, from balanced to unbalanced. Recently, preferential flow in oil and gas seepage process has hardly been definated, and very few studies have been made about it in this field. Combined with related research results both at home and abroad, the defination of preferential flow in seepage process of reservoir porous medium has been proposed, and the types of preferential flow and phenomenon representation, present study methods, existing problems and orintation of further research has also been discussed, all of which have provided theoretical basis for aceuate description of oil and gas seepage process.