低渗透岩石非饱和非Darcy渗流机理  

Non-Darcy percolation mechanism for seepage in low-permeability rock

作　　者：黄远智[1] 王恩志[1] 韩小妹[1] 

机构地区：[1]清华大学水利水电工程系,北京100084

出　　处：《清华大学学报（自然科学版）》2005年第9期1202-1205,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目(40172084;59779014)

摘　　要：为了探讨低渗透岩石非饱和非D arcy的机理,以毛管模型为基础,通过对流体非饱和系列流动状况的运动分析,相应推导得出流体非饱和渗流的毛管模型,从理论上论证在微小尺度孔隙中流体自身的力学特性,以及与固体、气体的相互作用,指出毛管压力与边界层的存在,是导致流体非D arcy渗流现象的一个主要原因。研究这些因素对渗流运动的影响机制,是探索低渗透岩石非D arcy渗流机理的一个重要方向。A capillary flow model was used to develop a non-Darcy percolation mechanism for seepage in low-permeability rock. The flow equations were based on a model of flow through a series of connected cavities to model non-saturated percolation in low permeability rock. The analysis shows that the water properties, the interactions among gas, water and rock, the capillary pressure, and the boundary layer all cause the non-Darcy effects in low permeability rock. Further understanding of the non-Darcy percolation mechanism could be reached by delving into these factors.

关 键 词：非DARCY渗流 低渗透岩石 边界层 毛管压力 毛管模型 

分 类 号：TV139.11[水利工程—水力学及河流动力学]