气候变化领域集成服务门户(CCPortal): Changing Flow Paths Caused by Simultaneous Shearing and Fracturing Observed During Hydraulic Stimulation

CCPortal

DOI	10.1029/2019GL086135
	Changing Flow Paths Caused by Simultaneous Shearing and Fracturing Observed During Hydraulic Stimulation
	Krietsch H.; Villiger L.; Doetsch J.; Gischig V.; Evans K.F.; Brixel B.; Jalali M.R.; Loew S.; Giardini D.; Amann F.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:3
英文摘要	We monitored the seismohydromechanical rock mass response to high-pressure fluid injection during a decameter-scale hydraulic stimulation experiment in crystalline rock at the Grimsel Test Site, Switzerland. Time series recorded at two pressure monitoring locations show abrupt pressure increases that change in amplitude and appearance between subsequent stimulation cycles. Induced seismicity correlates with the propagation of one of these pressure fronts. Deformation data along the same shear zone shows permanent fracture dislocation preceded by strong transient fracture opening. We interpret these observations as nonlinear pressure diffusion along flow channels that reorganize in response to hydromechanical effects during stimulation. Combining these observations with the in situ stress field estimated before stimulation, we argue that the underlying hydromechanical processes involve mixed-mode stimulation with both Mode I and II/III fracture dislocation. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Crystalline rocks; Induced Seismicity; Rocks; Stresses; Fracture dislocation; Grimsel ISC; High-pressure fluids; Hydraulic stimulations; hydromechanical response; In-situ experiments; In-situ stress field; Pressure monitoring; Fracture; amplitude; crystalline rock; diffusion; dislocation; experimental study; flow pattern; hydraulic property; hydrological modeling; hydromechanics; pressure field; shear stress; Bern [Switzerland]; Grimsel; Switzerland; Switzerland
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170740
作者单位	Department of Earth Sciences, ETH Zurich, Zurich, Switzerland; Swiss Seismological Service, ETH Zurich, Zurich, Switzerland; CSD Ingenieure AG, Bern, Switzerland; Department of Engineering Geology and Hydrogeology, RWTH Aachen University, Aachen, Germany
推荐引用方式 GB/T 7714	Krietsch H.,Villiger L.,Doetsch J.,et al. Changing Flow Paths Caused by Simultaneous Shearing and Fracturing Observed During Hydraulic Stimulation[J],2020,47(3).
APA	Krietsch H..,Villiger L..,Doetsch J..,Gischig V..,Evans K.F..,...&Amann F..(2020).Changing Flow Paths Caused by Simultaneous Shearing and Fracturing Observed During Hydraulic Stimulation.Geophysical Research Letters,47(3).
MLA	Krietsch H.,et al."Changing Flow Paths Caused by Simultaneous Shearing and Fracturing Observed During Hydraulic Stimulation".Geophysical Research Letters 47.3(2020).