气候变化领域集成服务门户(CCPortal): Seismicity and Stress Associated With a Fluid-Driven Fracture: Estimating the Evolving Geometry

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DOI	10.1029/2020JB020190
	Seismicity and Stress Associated With a Fluid-Driven Fracture: Estimating the Evolving Geometry
	Vasco D.W.; Smith J.T.; Hoversten G.M.
发表日期	2020
ISSN	21699313
卷号	125 期号:12
英文摘要	A coupled approach, combining the theory of rate- and state-dependent friction and methods from poroelasticity, forms the basis for a quantitative relationship between displacements and fluid leak-off from a growing fracture and changes in the rate of seismic events in the region surrounding the fracture. Poroelastic Green's functions link fracture aperture changes and fluid flow from the fracture to changes in the stress field and pore pressure in the adjacent formation. The theory of rate- and state-dependent friction provides a connection between Coulomb stress changes and variations in the rate of seismic events. Numerical modeling indicates that the Coulomb stress changes can vary significantly between formations with differing properties. The relationship between the seismicity rate changes and the changes in the formation stresses and fluid pressure is nonlinear, but a transformation produces a quantity that is linearly related to the aperture changes and fluid leak-off from the fracture. The methodology provides a means for mapping changes in seismicity into fracture aperture changes and to image an evolving fracture. An application to observed microseismicity associated with a hydrofracture reveals asymmetric fracture propagation within two main zones, with extended propagation in the upper zone. The time-varying volume of the fracture agrees with the injected volume, given by the integration of rate changes at the injection well, providing validation of the estimated aperture changes. ©2020. American Geophysical Union. All Rights Reserved. This article has been contributed to by US Government employees and their work is in the public domain in the USA.
英文关键词	fracturing; poroelasticity; rate and state friction; seismicity
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187440
作者单位	Energy Geosciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States; Chevron Energy Technology Company, San Ramon, CA, United States
推荐引用方式 GB/T 7714	Vasco D.W.,Smith J.T.,Hoversten G.M.. Seismicity and Stress Associated With a Fluid-Driven Fracture: Estimating the Evolving Geometry[J],2020,125(12).
APA	Vasco D.W.,Smith J.T.,&Hoversten G.M..(2020).Seismicity and Stress Associated With a Fluid-Driven Fracture: Estimating the Evolving Geometry.Journal of Geophysical Research: Solid Earth,125(12).
MLA	Vasco D.W.,et al."Seismicity and Stress Associated With a Fluid-Driven Fracture: Estimating the Evolving Geometry".Journal of Geophysical Research: Solid Earth 125.12(2020).