气体低速非达西渗流机理及渗流特征研究  

Study on low-velocity non-Darcy gas percolation mechanism and characteristics

作　　者：刘晓旭[1] 胡勇[1] 朱斌[1] 李宁[1] 冯曦[1] 

机构地区：[1]中油西南油气田公司,四川成都610051

出　　处：《特种油气藏》2006年第6期43-46,共4页Special Oil & Gas Reservoirs

基　　金：中石油重大开发试验项目下属子课题部分研究成果(项目编号:20050305-17)

摘　　要：为明确气体在低速渗流状态下的渗流规律以及产生低速非达西渗流的实质性原因,运用分子动力学、热力学和渗流力学等相关知识,基于滑脱效应和阈压效应两方面分析了气体在低速渗流状态下的渗流机理及渗流特征。研究认为,气体滑脱效应是毛细管壁处气体分子滑流和毛细管内部气体分子扩散的综合效应,是浓度场和压力场作用叠加的结果。This paper analyzes the percolation mechanism and characteristics of gas under low-velocity percolation state in terms of slippage effect and threshold pressure effect by using molecular dynamics,thermodynamics and percolation mechanics in order to understand the practical reason of low-velocity non-Darcy percolation.The study indicates that,the slippage effect is a combined result of gas molecule slip on capillary wall and gas molecular diffusion inside capillary tube,and also a result of combination of concentration and pressure fields.

关 键 词：含水气藏 低速非达西渗流 滑脱效应 阈压效应 启动压差 临界压力梯度 

分 类 号：TE312[石油与天然气工程—油气田开发工程]