关于双重有效应力——回应洪亮博士  

Discussion on the Dual Effective Stresses of Porous Media——Reply to Dr Hong Liang

作　　者：李传亮[1] 

机构地区：[1]西南石油大学石油与天然气工程学院,成都610599

出　　处：《新疆石油地质》2015年第2期238-243,共6页Xinjiang Petroleum Geology

基　　金：国家科技重大专项(2011ZX05027-003-01)

摘　　要：双重有效应力概念提出于1999年,是继Terzaghi有效应力和Biot有效应力之后提出的有效应力概念,应用非常广泛。Terzaghi有效应力近似适用于极其疏松的多孔介质,Biot有效应力属于经验公式,二者存在一定的缺陷。双重有效应力克服了它们的缺陷,充分考虑了多孔介质的变形机制和物质结构。多孔介质存在两种基本的变形机制(本体变形和结构变形),与此相对应,多孔介质有2个有效应力(本体有效应力和结构有效应力)。本体有效应力决定多孔介质的本体变形,结构有效应力决定多孔介质的结构变形。双重有效应力引入了多孔介质的物质结构参数,通过孔隙度把多孔介质与普通固体统一了起来,因而应用范围也更加广泛。The dual effective stresses of porous media were established in 1999 and have been widely applied nowadays. The concept of du- al effective stresses was proposed after Terzaghi effective stress and Biot effective stress. Terzaghi effective stress is only applicable to ex- tremely loose porous media approximately, and Biot effective stress is an empirical formula, which have some defects. The dual effective stresses overcome the defects of them by taking consideration of deformation mechanism and material structure of porous media. Porous me- dia have two typical deformations： primary deformation and structural deformation. Correspondingly porous media have two effective stress- es： primary effective stress and structural effective stress. Primary effective stress determines the primary deformation of porous media, while structural effective stress determines the structural deformation. By introducing parameters of material structure of porous media into the formula, the dual effective stresses unified porous media and common solids using porosity, so can get wider applications than Terzaghi ef- fective stress and Biot effective stress.

关 键 词：岩石 土 多孔介质 变形机制 有效应力 双重有效应力 孔隙度 

分 类 号：TE311[石油与天然气工程—油气田开发工程]