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	Experimental study on coupled flow through low permeability rock under confining pressure
	Wang Enzhi ; Zhang Wenshao ; Han Xiaomei ; Huang Yuanzhi
	2010-05-11 ; 2010-05-11
关键词	Experimental/ flow instability flow measurement mechanical testing permeability rocks/ coupled flow low permeability saturated rock confining pressure steady-state flow experiment low permeability sandstone triaxial testing system flow measurement brine liquid constant flow speed constant pressure gradient/ A9160B Mechanical and acoustic properties of rocks, minerals and soil A4720 Hydrodynamic stability and instability A4780 Measurement instrumentation and techniques for fluid dynamics A8170 Materials testing E2130 Fluid mechanics and aerodynamics (mechanical engineering) E1620 Measurement E1630 Testing
中文摘要	A steady-state flow experiment was performed to investigate the coupled flow through low permeability sandstone subjected to confining pressure. A precise triaxial testing system (FDES-641) was used to measure the flow of brine liquid through low permeability saturated rock under two different conditions, such as constant flow speed and constant pressure gradient. The experiments confirmed that the permeability of sandstone samples varies with the change of the confining pressure and that the relationship is nonlinear. Under both conditions the permeability of sandstone decreases with an increase of the confining pressure, but the decreasing rate of permeability becomes lower at a low level of confining pressure, so that the ratio of the permeability is approximately inversely proportional to the confining pressure. During unloading of the confining pressure, the permeability of rock increases, but with lower rate in comparison with that in the loading process of the confining pressure. The constant flow speed condition is more easily controlled than the constant pressure gradient condition, so it is more commonly used in steady-state flow experiments.
语种	中文 ; 中文
出版者	Tsinghua Univ. Press ; China
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/27300]
专题	清华大学
推荐引用方式 GB/T 7714	Wang Enzhi,Zhang Wenshao,Han Xiaomei,et al. Experimental study on coupled flow through low permeability rock under confining pressure[J],2010, 2010.
APA	Wang Enzhi,Zhang Wenshao,Han Xiaomei,&Huang Yuanzhi.(2010).Experimental study on coupled flow through low permeability rock under confining pressure..
MLA	Wang Enzhi,et al."Experimental study on coupled flow through low permeability rock under confining pressure".(2010).

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