气候变化领域集成服务门户(CCPortal): Variational Phase-Field Modeling of Hydraulic Fracture Interaction With Natural Fractures and Application to Enhanced Geothermal Systems

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DOI	10.1029/2020JB019856
	Variational Phase-Field Modeling of Hydraulic Fracture Interaction With Natural Fractures and Application to Enhanced Geothermal Systems
	Lepillier B.; Yoshioka K.; Parisio F.; Bakker R.; Bruhn D.
发表日期	2020
ISSN	21699313
卷号	125 期号:7
英文摘要	In every tight formation reservoir, natural fractures play an important role for mass and energy transport and stress distribution. Enhanced Geothermal Systems (EGS) make no exception, and stimulation aims at increasing the reservoir permeability to enhance fluid circulation and heat transport. EGS development relies upon the complex task of predicting accurate hydraulic fracture propagation pathway by taking into account reservoir heterogeneities and natural or preexisting fractures. In this contribution, we employ the variational phase-field method, which handles hydraulic fracture initiation, propagation, and interaction with natural fractures and is tested under varying conditions of rock mechanical properties and natural fractures distributions. We run bidimensional finite element simulations employing the open-source software OpenGeoSys and apply the model to simulate realistic stimulation scenarios, each one built from field data and considering complex natural fracture geometries in the order of a thousand of fractures. Key mechanical properties are derived from laboratory measurements on samples obtained in the field. Simulations results confirm the fundamental role played by natural fractures in stimulation's predictions, which is essential for developing successful EGS projects. ©2020. The Authors.
英文关键词	Enhanced Geothermal System; hydraulic fracture; natural fractures; phase field; stimulation
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/187751
作者单位	Department of Geoscience and Engineering, Delft University of Technology, Delft, Netherlands; Department of Environmental Informatics, Helmholtz Centre for Environmental Research-UFZ, Leipzig, Germany; Chair of Soil Mechanics and Foundation Engineering, Institute of Geotechnics, Technische Universität Bergakademie Freiberg, Freiberg, Germany; GFZ German Research Centre for Geosciences, Potsdam, Germany
推荐引用方式 GB/T 7714	Lepillier B.,Yoshioka K.,Parisio F.,et al. Variational Phase-Field Modeling of Hydraulic Fracture Interaction With Natural Fractures and Application to Enhanced Geothermal Systems[J],2020,125(7).
APA	Lepillier B.,Yoshioka K.,Parisio F.,Bakker R.,&Bruhn D..(2020).Variational Phase-Field Modeling of Hydraulic Fracture Interaction With Natural Fractures and Application to Enhanced Geothermal Systems.Journal of Geophysical Research: Solid Earth,125(7).
MLA	Lepillier B.,et al."Variational Phase-Field Modeling of Hydraulic Fracture Interaction With Natural Fractures and Application to Enhanced Geothermal Systems".Journal of Geophysical Research: Solid Earth 125.7(2020).