气候变化领域集成服务门户(CCPortal): Analytical Solution to Assess the Induced Seismicity Potential of Faults in Pressurized and Depleted Reservoirs

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DOI	10.1029/2020JB020436
	Analytical Solution to Assess the Induced Seismicity Potential of Faults in Pressurized and Depleted Reservoirs
	Wu H.; Vilarrasa V.; De Simone S.; Saaltink M.; Parisio F.
发表日期	2021
ISSN	21699313
卷号	126 期号:1
英文摘要	Displaced faults crossing the reservoir could significantly increase the induced earthquake frequency in geo-energy projects. Understanding and predicting the stress variation in such cases is essential to minimize the risk of induced seismicity. Here, we adopt the inclusion theory to develop an analytical solution for the stress response to pore pressure variations within the reservoir for both permeable and impermeable faults with offset ranging from zero to the reservoir thickness. By analyzing fault stability changes due to reservoir pressurization/depletion under different scenarios, we find that (1) the induced seismicity potential of impermeable faults is always larger than that of permeable faults under any initial and injection conditions—the maximum size of the fault undergoing failure is 3–5 times larger for impermeable than for permeable faults; (2) stress concentration at the corners results in the occurrence of reversed slip in normal faults with a normal faulting stress regime; (3) while fault offset has no impact on the slip potential for impermeable faults, the slip potential increases with the offset for permeable faults, which indicates that non-displaced permeable faults constitute a safer choice for site selection; (4) an impermeable fault would rupture at a lower deviatoric stress, and at a smaller pressure buildup than a permeable one; and (5) the induced seismicity potential is overestimated and the injectivity underestimated if the stress arching (i.e., the poromechanical coupling) is neglected. This analytical solution is a useful tool for site selection and for supporting decision making during the lifetime of geo-energy projects. © 2020 The Authors.
英文关键词	fault stability; inclusion theory; induced earthquakes; permeable and impermeable faults; reservoir pressurization/depletion
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187404
作者单位	Department of Civil and Environmental Engineering (DECA), Universitat Politécnica de Catalunya (UPC), Barcelona, Spain; Associated Unit: Hydrogeology Group (UPC-CSIC), Barcelona, Spain; Institute of Environmental Assessment and Water Research (IDAEA), Spanish National Research Council (CSIC), Barcelona, Spain; Mediterranean Institute for Advanced Studies (IMEDEA), Spanish National Research Council (CSIC), Esporles, Spain; Univ Rennes, CNRS, Géosciences Rennes-UMR 6118, Rennes, France; Chair of Soil Mechanics and Foundation Engineering, Institute of Geotechnics, Technische Universität Bergakademie Freiberg, Freiberg, Germany
推荐引用方式 GB/T 7714	Wu H.,Vilarrasa V.,De Simone S.,et al. Analytical Solution to Assess the Induced Seismicity Potential of Faults in Pressurized and Depleted Reservoirs[J],2021,126(1).
APA	Wu H.,Vilarrasa V.,De Simone S.,Saaltink M.,&Parisio F..(2021).Analytical Solution to Assess the Induced Seismicity Potential of Faults in Pressurized and Depleted Reservoirs.Journal of Geophysical Research: Solid Earth,126(1).
MLA	Wu H.,et al."Analytical Solution to Assess the Induced Seismicity Potential of Faults in Pressurized and Depleted Reservoirs".Journal of Geophysical Research: Solid Earth 126.1(2021).