GSTDTAP  > 气候变化
DOI10.1029/2018GL077551
Geomechanical Sensitivities of Injection-Induced Earthquakes
Levandowski, Will1; Weingarten, Matthew2,3; Walsh, Rall, III2,4
2018-09-16
发表期刊GEOPHYSICAL RESEARCH LETTERS
ISSN0094-8276
EISSN1944-8007
出版年2018
卷号45期号:17页码:8958-8965
文章类型Article
语种英语
国家USA
英文摘要

Wastewater reinjection increases pore fluid pressure and can make faults frictionally unstable, triggering earthquakes. Little is known, however, about how regional geomechanical properties influence the likelihood that disposal will induce seismicity. We investigate the impact of preinjection conditions on the proportion of possible fault orientations destabilized by a specified pore pressure increase. Stress state is the most important factor, with 7 times as many planes unstable in extension than contractionindeed, normal or strike-slip faulting environments characterize most injection-induced seismicityand additional fivefold increases in transitional stress states. Geomechanical susceptibility depends inversely on overburden density and depth, consistent with the shallow hypocenters of most induced events. The coefficient of friction and initial pore pressure have little impact: Faults initially below hydrostatic pressure can slip during gravity-fed injection. Combining these factors, site-specific geomechanical analyses could determine 300-fold variations in the likelihood of induced seismicity before disposal, offering a proactive way to manage hazard.


Plain Language Summary We investigate what factors influence the likelihood that industrial activities will trigger earthquakes. The initial pore-fluid pressure is unimportant, meaning that gravity-fed injection can readily cause seismicity. By contrast, readily known properties of the region (stress state, depth to bedrock faults, and density of the overlying sedimentary rock units) produce 300-fold variations in the likelihood of injection-induced earthquakes. Conducting simple analyses prior to injection could mitigate seismic hazard.


领域气候变化
收录类别SCI-E
WOS记录号WOS:000445727500029
WOS关键词WASTE-WATER INJECTION ; SEISMICITY ; OKLAHOMA ; MIDCONTINENT ; SEQUENCE ; HAZARD ; BASIN ; FIELD
WOS类目Geosciences, Multidisciplinary
WOS研究方向Geology
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/27360
专题气候变化
作者单位1.Colorado Coll, Dept Geol, Colorado Springs, CO 80903 USA;
2.Stanford Univ, Dept Geophys, Stanford, CA 94305 USA;
3.San Diego State Univ, Dept Geol Sci, San Diego, CA 92182 USA;
4.Decis Geomech LLC, San Francisco, CA USA
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GB/T 7714
Levandowski, Will,Weingarten, Matthew,Walsh, Rall, III. Geomechanical Sensitivities of Injection-Induced Earthquakes[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(17):8958-8965.
APA Levandowski, Will,Weingarten, Matthew,&Walsh, Rall, III.(2018).Geomechanical Sensitivities of Injection-Induced Earthquakes.GEOPHYSICAL RESEARCH LETTERS,45(17),8958-8965.
MLA Levandowski, Will,et al."Geomechanical Sensitivities of Injection-Induced Earthquakes".GEOPHYSICAL RESEARCH LETTERS 45.17(2018):8958-8965.
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