气候变化领域集成服务门户(CCPortal): Dynamic Stressing of Naturally Fractured Rocks: On the Relation Between Transient Changes in Permeability and Elastic Wave Velocity

CCPortal

DOI	10.1029/2019GL083557
	Dynamic Stressing of Naturally Fractured Rocks: On the Relation Between Transient Changes in Permeability and Elastic Wave Velocity
	Shokouhi P.; Jin J.; Wood C.; Rivière J.; Madara B.; Elsworth D.; Marone C.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:1
英文摘要	We report on laboratory experiments designed to explore the fundamental processes that impact fluid permeability during drilling and fluid injection. Coupled ultrasonic and permeability measurements are presented for Westerly granite samples fractured in situ and used to illuminate the relationship between nonlinear dynamic stiffness and fracture permeability indexed via fracture aperture. We perturb the effective stress field using normal stress and pore pressure oscillations. The velocity of ultrasonic waves transmitted across the fracture is used to infer the evolution of elastic properties and the fracture nonlinearity. Changes in permeability are measured concurrently. We observe that relative changes in wave velocity and permeability, due to both normal stress and pore pressure oscillations, are correlated, such that larger drops in wave velocity (higher nonlinearity) correspond to larger increases in permeability. Our observations suggest that dynamic stressing is more likely to enhance the permeability of fractures that exhibit greater nonlinearity. ©2019. American Geophysical Union. All Rights Reserved.
英文关键词	Acoustic wave velocity; Mechanical permeability; Pore pressure; Ultrasonic waves; Wave propagation; Dynamic stressing; Effective stress field; Elastic wave velocity; Fracture permeability; Laboratory experiments; nonlinearity; Permeability measurements; Ultrasonic wave velocity; Fracture; drilling fluid; effective stress; fluid injection; fracture; permeability; pore pressure; stress field; ultrasonics; wave velocity
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/170865
作者单位	Department of Engineering Science and Mechanics, Pennsylvania State University, University Park, PA, United States; Department of Geosciences, Pennsylvania State University, University Park, PA, United States
推荐引用方式 GB/T 7714	Shokouhi P.,Jin J.,Wood C.,et al. Dynamic Stressing of Naturally Fractured Rocks: On the Relation Between Transient Changes in Permeability and Elastic Wave Velocity[J],2020,47(1).
APA	Shokouhi P..,Jin J..,Wood C..,Rivière J..,Madara B..,...&Marone C..(2020).Dynamic Stressing of Naturally Fractured Rocks: On the Relation Between Transient Changes in Permeability and Elastic Wave Velocity.Geophysical Research Letters,47(1).
MLA	Shokouhi P.,et al."Dynamic Stressing of Naturally Fractured Rocks: On the Relation Between Transient Changes in Permeability and Elastic Wave Velocity".Geophysical Research Letters 47.1(2020).