气候变化领域集成服务门户(CCPortal): Heterogeneous Fracture Slip and Aseismic-Seismic Transition in a Triaxial Injection Test

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DOI	10.1029/2020GL087739
	Heterogeneous Fracture Slip and Aseismic-Seismic Transition in a Triaxial Injection Test
	Ye Z.; Ghassemi A.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:14
英文摘要	Fault/fracture slip and seismicity caused by fluid injection are of major interest to subsurface science and engineering. However, some fundamental aspects of the temporal and spatial evolutions of induced seismicity remain unresolved. In this paper, we present the results of a laboratory injection-induced shear test conducted on a rough granite fracture with concurrent acoustic emission (AE) monitoring. The results demonstrate a sequence of aseismic-seismic-aseismic fracture motion during fluid injection. It is observed that the temporal evolution of AE/microseismic activities was accompanied by the changes of slip velocity, stress drop, and friction coefficient. The seismic slip phase consists of three subphases, namely, a first quasi-static slip, a dynamic slip, and a second quasi-static slip. The dynamic slip occurred with an AE mainshock, simulating earthquake instability triggered by injection in deep crystalline rocks. In addition, slip heterogeneity controlled by the fracture surface roughness is directly evidenced by the spatially heterogeneous distribution of AE hypocenters and fracture surface topography. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Crystalline rocks; Earthquakes; Fracture; Friction; Induced Seismicity; Surface roughness; Topography; Earthquake instability; Fluid injections; Friction coefficients; Granite fractures; Heterogeneous distributions; Science and engineering; Temporal and spatial evolutions; Temporal evolution; Acoustic emission testing; acoustic emission; earthquake hypocenter; fault slip; fluid injection; fracture; induced seismicity; instability; seismicity; shear test; slip; surface roughness; triaxial test
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/170135
作者单位	Reservoir Geomechanics and Seismicity Research Group, University of Oklahoma, Norman, OK, United States
推荐引用方式 GB/T 7714	Ye Z.,Ghassemi A.. Heterogeneous Fracture Slip and Aseismic-Seismic Transition in a Triaxial Injection Test[J],2020,47(14).
APA	Ye Z.,&Ghassemi A..(2020).Heterogeneous Fracture Slip and Aseismic-Seismic Transition in a Triaxial Injection Test.Geophysical Research Letters,47(14).
MLA	Ye Z.,et al."Heterogeneous Fracture Slip and Aseismic-Seismic Transition in a Triaxial Injection Test".Geophysical Research Letters 47.14(2020).