globalchange  > 气候变化与战略
DOI: 10.1016/j.tecto.2020.228572
论文题名:
Injection-driven fracture instability in granite: Mechanism and implications
作者: Ji Y.; Wu W.
刊名: Tectonophysics
ISSN: 00401951
出版年: 2020
卷: 791
语种: 英语
中文关键词: Injection-induced seismicity ; Laboratory experiments ; Rock fractures ; Seismic moment release
英文关键词: Fracture ; Geothermal fields ; Induced Seismicity ; Stability ; Surface roughness ; Acoustic emission characteristics ; Effective normal stress ; Enhanced geothermal systems ; Fluid overpressure ; Fracture instability ; Fracture surfaces ; Hydraulic stimulations ; Uniform reduction ; Acoustic emission testing ; enhanced geothermal system ; fluid injection ; fracture flow ; granite ; hydraulic fracturing ; instability ; seismic response ; seismicity
英文摘要: An unprecedented increase in earthquakes associated with hydraulic stimulation has been recognized as a major barrier to the development of enhanced geothermal systems. However, the mechanism of injection-induced seismicity remains enigmatic. Here we simulate the critical stress states of sawcut and natural fractures, and examine the fracture instabilities due to fluid injection. We shed light on fluid pressure heterogeneity, injection-induced fracture instability, acoustic emission characteristics and fracture surface evolution. We find that injection-induced fracture instability is strongly dependent on fluid pressure heterogeneity and fracture surface heterogeneity. High injection rates can induce a high fluid overpressure ratio in the sawcut fracture, promoting the rupture of fracture extending into the unpressurized area. The instability of the natural fracture is due to the near-uniform reduction in effective normal stress associated with a low fluid overpressure ratio. Our data indicate that maintaining a low fluid overpressure ratio during injection activities could confine the rupture of fracture within the pressurized area. A turning point of the total moment release may be used as a reference to optimize the fluid injection strategy. The seismic response of rock fracture could be modified by changing fluid pathways between the injection borehole and the fracture and by evolving surface roughness of the fracture within the stimulated volume. © 2020 Elsevier B.V.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170614
Appears in Collections:气候变化与战略

Files in This Item:

There are no files associated with this item.


作者单位: School of Civil and Environmental Engineering, Nanyang Technological University639798, Singapore

Recommended Citation:
Ji Y.,Wu W.. Injection-driven fracture instability in granite: Mechanism and implications[J]. Tectonophysics,2020-01-01,791
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Ji Y.]'s Articles
[Wu W.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Ji Y.]'s Articles
[Wu W.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Ji Y.]‘s Articles
[Wu W.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.