气候变化领域集成服务门户(CCPortal): Large-Scale Fracture Systems Are Permeable Pathways for Fault Activation During Hydraulic Fracturing

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DOI	10.1029/2020JB020311
	Large-Scale Fracture Systems Are Permeable Pathways for Fault Activation During Hydraulic Fracturing
	Igonin N.; Verdon J.P.; Kendall J.-M.; Eaton D.W.
发表日期	2021
ISSN	21699313
卷号	126 期号:3
英文摘要	Induced seismicity due to fluid injection, including hydraulic fracturing, is an increasingly common phenomenon worldwide; yet, the mechanisms by which hydraulic fracturing causes fault activation remain unclear. Here we show that preexisting fracture networks are instrumental in transferring fluid pressures to larger faults on which dynamic rupture occurs. Studies of hydraulic fracturing-induced seismicity in North America have often used observations from regional seismograph networks at distances of 10s of km, and as such lack the resolution to answer some of the key questions about triggering mechanisms. To carry out a more detailed analysis of the mechanisms of fault activation, we use data from a dense sensor array located at a hydraulic-fracturing site in Alberta, Canada. The spatiotemporal distribution of event hypocenters, coupled with measurements of seismic anisotropy, reveal the presence of preexisting fracture corridors that allowed communication of fluid-pressure perturbations to larger faults, over distances of 1 km or more. The presence of preexisting permeable fracture networks can significantly increase the volume of rock affected by the pore-pressure increase, thereby increasing the probability of induced seismicity. This study demonstrates the importance of understanding the connectivity of preexisting natural fractures for assessing potential seismic hazards associated with hydraulic fracturing of shale formations and offers a detailed case exposition of induced seismicity due to hydraulic fracturing. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	anisotropy; hydraulic fracturing; induced seismicity; microseismic
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/187311
作者单位	Department of Geoscience, University of Calgary, Calgary, AB, Canada; School of Earth Sciences, University of Bristol, Wills Memorial Building, Bristol, United Kingdom; Department of Earth Sciences, University of Oxford, South Parks Road, Oxford, United Kingdom
推荐引用方式 GB/T 7714	Igonin N.,Verdon J.P.,Kendall J.-M.,et al. Large-Scale Fracture Systems Are Permeable Pathways for Fault Activation During Hydraulic Fracturing[J],2021,126(3).
APA	Igonin N.,Verdon J.P.,Kendall J.-M.,&Eaton D.W..(2021).Large-Scale Fracture Systems Are Permeable Pathways for Fault Activation During Hydraulic Fracturing.Journal of Geophysical Research: Solid Earth,126(3).
MLA	Igonin N.,et al."Large-Scale Fracture Systems Are Permeable Pathways for Fault Activation During Hydraulic Fracturing".Journal of Geophysical Research: Solid Earth 126.3(2021).