气候变化领域集成服务门户(CCPortal): Effect of Fluid Viscosity on Earthquake Nucleation

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DOI	10.1029/2020GL087854
	Effect of Fluid Viscosity on Earthquake Nucleation
	Cornelio C.; Violay M.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:12
英文摘要	Injection of fluids in geo-reservoirs can reduce the effective stresses at depth, lubricating the nearby faults, promoting slip and, potentially, earthquakes. High-viscous fluids are often used during hydraulic fracturing and production phases in geo-reservoirs. Here, we performed dedicated experiments to study the influence of fluid viscosity on earthquake nucleation. We performed frictional sliding experiments at 30 and 50 effective normal stresses and fluids viscosity ranging from 1 to 1,226 mPa s and modeled them with a rate-and-state friction law. In the presence of fluid, the state variable is defined as the ability of the fluid to flow. Our results showed that static friction slightly decreases with increasing viscosity, the dynamic friction is governed by the dimensionless Sommerfeld number (S = 6ηVL/(σ'nH2)). Moreover, we observed that the (a − b) parameters of the rate-and-state friction law decrease with increasing viscosity down to (a − b) < 0, possibly promoting unstable slip and earthquake nucleation. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Crystallization; Earthquakes; Nucleation; Stiction; Earthquake nucleation; Effective normal stress; Frictional sliding; High viscous fluids; Increasing viscosity; Influence of fluid; Production phasis; Rate and state friction; Viscosity; earthquake event; experimental study; fluid composition; friction; nucleation; slip; viscosity
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170215
作者单位	Laboratory of Experimental Rock Mechanics, IIC, ENAC, EPFL, Station 18, Lausanne, Switzerland
推荐引用方式 GB/T 7714	Cornelio C.,Violay M.. Effect of Fluid Viscosity on Earthquake Nucleation[J],2020,47(12).
APA	Cornelio C.,&Violay M..(2020).Effect of Fluid Viscosity on Earthquake Nucleation.Geophysical Research Letters,47(12).
MLA	Cornelio C.,et al."Effect of Fluid Viscosity on Earthquake Nucleation".Geophysical Research Letters 47.12(2020).