Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018GL077551 |
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
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
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 |
推荐引用方式 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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