气候变化领域集成服务门户(CCPortal): Increased Fractured Rock Permeability After Percolation Despite Limited Crack Growth

CCPortal

DOI	10.1029/2019JB019240
	Increased Fractured Rock Permeability After Percolation Despite Limited Crack Growth
	Renshaw C.E.; Schulson E.M.; Iliescu D.; Murzda A.
发表日期	2020
ISSN	21699313
卷号	125 期号:8
英文摘要	Fractured rock permeability can increase by crack extension that creates additional flow pathways or by increases in crack openings that increase crack transmissivity. Understanding the partitioning between these two mechanisms during rock deformation is critical for conceptual models of fluid flow and transport in crystalline rocks and sedimentary layers with low matrix permeability and for the hydromechanics of crustal rocks. Using ice as a model for rock, new systematic experiments reveal that when subject to uniaxial loading at a constant strain rate, crack density remains nearly constant after the onset of percolation even while permeability increases, indicating that after the onset of percolation the increase in permeability is primarily due to the opening of existing cracks rather than the extension of cracks. These observations have implications for conceptual models of fractured rock permeability that often focus on the evolution of permeability with changing fracture density rather than changing fracture transmissivity and for attempts to link fractured rock permeability to seismic properties that often dominantly consider changes in crack density rather than crack apertures. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	fracture; ice; permeability
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/187679
作者单位	Department of Earth Sciences, Dartmouth College, Hanover, NH, United States; Thayer School of Engineering, Dartmouth College, Hanover, NH, United States
推荐引用方式 GB/T 7714	Renshaw C.E.,Schulson E.M.,Iliescu D.,et al. Increased Fractured Rock Permeability After Percolation Despite Limited Crack Growth[J],2020,125(8).
APA	Renshaw C.E.,Schulson E.M.,Iliescu D.,&Murzda A..(2020).Increased Fractured Rock Permeability After Percolation Despite Limited Crack Growth.Journal of Geophysical Research: Solid Earth,125(8).
MLA	Renshaw C.E.,et al."Increased Fractured Rock Permeability After Percolation Despite Limited Crack Growth".Journal of Geophysical Research: Solid Earth 125.8(2020).