| DOI: | 10.1002/2013GL058514
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| 论文题名: | Change of stress regime during geothermal reservoir stimulation |
| 作者: | Schoenball M.; Dorbath L.; Gaucher E.; Wellmann J.F.; Kohl T.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-10350
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| EISSN: | 1944-10081
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| 出版年: | 2014
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| 卷: | 41, 期:4 | | 起始页码: | 1163
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| 结束页码: | 1170
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| 语种: | 英语
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| 英文关键词: | EGS
; fluid injection
; induced seismicity
; stress inversion
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| Scopus关键词: | Faulting
; Geothermal fields
; Stresses
; Wastewater disposal
; Water injection
; Well logging
; Earthquake focal mechanisms
; EGS
; Fluid injections
; Geothermal exploitation
; Hydrocarbon production
; Induced seismicity
; Stress inversion
; Stress orientation and magnitudes
; Earthquakes
; deformation mechanism
; earthquake epicenter
; earthquake magnitude
; faulting
; geothermal energy
; hydrocarbon reservoir
; induced seismicity
; seismicity
; strike-slip fault
; waste disposal
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| 英文摘要: | Earthquakes are induced by man-made changes of the stress field by injection or withdrawal of fluids in hydrocarbon production, geothermal exploitation, and wastewater disposal. However, the actual perturbation of the stress field and stress release by injection-induced seismicity remains largely unknown. We provide evidence for currently not understood hydromechanical processes after shut-in of the well. We invert earthquake focal mechanisms from a massive stimulation to invert for stress resolved in time and depth to obtain changes of the stress orientation and magnitude. Prior information about fracture orientations from well logs is taken into account. Comparison with independent stress measures reveals that stresses obtained from inversion of fluid-induced seismicity are highly perturbed and not representative of the initial stress field. The horizontal stresses change by tens of megapascals, turning the stress regime from transitional normal faulting/strike-slip faulting to pure normal faulting. The observed stress changes are attributed to large-scale aseismic deformation. Key Points Geological and seismological data used to measure stress magnitude changes Stress release by several tens of megapascal lead to change of stress regime Hydro-mechanical conditions in the reservoir change abruptly upon shut-in ©2014. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84893855723&doi=10.1002%2f2013GL058514&partnerID=40&md5=75eb084d8eb01f2dab3f8a9f2fa4bf7f
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/7614
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Karlsruhe Institute of Technology, Institute of Applied Geosciences, Karlsruhe, Germany
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| Recommended Citation: | |
Schoenball M.,Dorbath L.,Gaucher E.,et al. Change of stress regime during geothermal reservoir stimulation[J]. Geophysical Research Letters,2014-01-01,41(4).
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