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Imaging Elastodynamic and Hydraulic Properties of Fractured Rock: Exploring Effects of Dynamic Stressing, Shearing, Fracture Aperture, and Roughness
Imaging Elastodynamic and Hydraulic Properties of Fractured Rock: Exploring Effects of Dynamic Stressing, Shearing, Fracture Aperture, and Roughness
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211152110
- ISBN
- 9798384216025
- DDC
- 600
- 서명/저자
- Imaging Elastodynamic and Hydraulic Properties of Fractured Rock: Exploring Effects of Dynamic Stressing, Shearing, Fracture Aperture, and Roughness
- 발행사항
- [Sl] : The Pennsylvania State University, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 180 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-03, Section: B.
- 주기사항
- Advisor: Marone, Chris;Shokouhi, Parisa.
- 학위논문주기
- Thesis (Ph.D.)--The Pennsylvania State University, 2024.
- 초록/해제
- 요약Dynamic perturbations in the subsurface, originating from natural or industrial sources, are associated with observations of changes in poro-elastic properties that have far-ranging effects. Broadly, there are "strain-induced" and "fluid-induced" sources of these subsurface perturbations and, importantly, they produce coupled phenomenological observations. Many experimental and numerical studies that quantify elastic and hydraulic properties of rock, fractured (or ``intact'') under static stress conditions, however these measures are not necessarily indicative of their response during dynamic stress conditions. Motivated by these field observations, I use simultaneous continuous fluid flow and ultrasonic monitoring to quantify the elastic and permeability changes of natural and rough fractures. Furthermore, I incorporate measures of fracture topology and contact area to connect to the spatially variable ultrasonic monitoring and as inputs for multiphysics modeling of a single planar fracture.In this dissertation, I ask fundamental questions surrounding the connection between fracture specific stiffness and fluid transport under a range of loading conditions and dynamic stressing. Moreover, I do so by performing complex experiments under triaxial stresses and use simultaneous continuous active-source ultrasonic monitoring and fluid flux measurements to measure the static and dynamic elastic and hydraulic properties of fractures. These unique experiments are also complemented by post-surface and topography characterization using pressure registering films and profilometry.I begin this dissertation by introducing the problem statement broadly and providing some context for field-scale observations of dynamic stress-induced changes in the subsurface and lay out the limitation of linear elastic work within this context. In Chapter 2, I use ultrasonic monitoring to image the spatial and elastic variability across an in-situ fractured rock specimen and relate these to fluid flow. These experiments produced complex results which highlights the variable nature of sheared fractured rock. In Chapters 3 and 4, I extend the work of Chapter 1 by focusing on the effect of stress state on dynamic stress-induced changes in flow and elasticity. Chapter 3 demonstrates the systematic reduction in nonlinear elasticity and permeability enhancement with increasing stress state, simulating depths. I additionally relate the real contact area from pressure sensitive films to the documented elastodynamic changes. Chapter 4 leverages the experimental results from Chapter 3 and utilizes high-resolution profilometry of the tensile fracture specimen as an input for multiphysics modeling. I demonstrate that perfectly matched fracture surfaces can reproduce some of the static fluid flow properties and that misalignment is highly influential on overall poro-elastic properties. Chapter 5 represents a focused study on the relation between roughness and granular in-fill of planar fractures and their influence on elastodynamic and hydraulic changes.
- 일반주제명
- Mechanical properties
- 일반주제명
- Stress state
- 일반주제명
- Heat treating
- 일반주제명
- Fault lines
- 일반주제명
- Permeability
- 일반주제명
- Earthquakes
- 일반주제명
- Transmitters
- 일반주제명
- Deformation
- 일반주제명
- Acoustics
- 일반주제명
- Hydraulics
- 일반주제명
- Hydraulic engineering
- 일반주제명
- Mechanics
- 일반주제명
- Thermodynamics
- 기본자료저록
- Dissertations Abstracts International. 86-03B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520250211152110
■006m o d
■007cr#unu||||||||
■020 ▼a9798384216025
■035 ▼a(MiAaPQ)AAI31353833
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■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a600
■1001 ▼aWood, Clay Emerson.
■24510▼aImaging Elastodynamic and Hydraulic Properties of Fractured Rock: Exploring Effects of Dynamic Stressing, Shearing, Fracture Aperture, and Roughness
■260 ▼a[Sl]▼bThe Pennsylvania State University▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a180 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-03, Section: B.
■500 ▼aAdvisor: Marone, Chris;Shokouhi, Parisa.
■5021 ▼aThesis (Ph.D.)--The Pennsylvania State University, 2024.
■520 ▼aDynamic perturbations in the subsurface, originating from natural or industrial sources, are associated with observations of changes in poro-elastic properties that have far-ranging effects. Broadly, there are "strain-induced" and "fluid-induced" sources of these subsurface perturbations and, importantly, they produce coupled phenomenological observations. Many experimental and numerical studies that quantify elastic and hydraulic properties of rock, fractured (or ``intact'') under static stress conditions, however these measures are not necessarily indicative of their response during dynamic stress conditions. Motivated by these field observations, I use simultaneous continuous fluid flow and ultrasonic monitoring to quantify the elastic and permeability changes of natural and rough fractures. Furthermore, I incorporate measures of fracture topology and contact area to connect to the spatially variable ultrasonic monitoring and as inputs for multiphysics modeling of a single planar fracture.In this dissertation, I ask fundamental questions surrounding the connection between fracture specific stiffness and fluid transport under a range of loading conditions and dynamic stressing. Moreover, I do so by performing complex experiments under triaxial stresses and use simultaneous continuous active-source ultrasonic monitoring and fluid flux measurements to measure the static and dynamic elastic and hydraulic properties of fractures. These unique experiments are also complemented by post-surface and topography characterization using pressure registering films and profilometry.I begin this dissertation by introducing the problem statement broadly and providing some context for field-scale observations of dynamic stress-induced changes in the subsurface and lay out the limitation of linear elastic work within this context. In Chapter 2, I use ultrasonic monitoring to image the spatial and elastic variability across an in-situ fractured rock specimen and relate these to fluid flow. These experiments produced complex results which highlights the variable nature of sheared fractured rock. In Chapters 3 and 4, I extend the work of Chapter 1 by focusing on the effect of stress state on dynamic stress-induced changes in flow and elasticity. Chapter 3 demonstrates the systematic reduction in nonlinear elasticity and permeability enhancement with increasing stress state, simulating depths. I additionally relate the real contact area from pressure sensitive films to the documented elastodynamic changes. Chapter 4 leverages the experimental results from Chapter 3 and utilizes high-resolution profilometry of the tensile fracture specimen as an input for multiphysics modeling. I demonstrate that perfectly matched fracture surfaces can reproduce some of the static fluid flow properties and that misalignment is highly influential on overall poro-elastic properties. Chapter 5 represents a focused study on the relation between roughness and granular in-fill of planar fractures and their influence on elastodynamic and hydraulic changes.
■590 ▼aSchool code: 0176.
■650 4▼aMechanical properties
■650 4▼aStress state
■650 4▼aHeat treating
■650 4▼aFault lines
■650 4▼aPermeability
■650 4▼aEarthquakes
■650 4▼aTransmitters
■650 4▼aDeformation
■650 4▼aAcoustics
■650 4▼aHydraulics
■650 4▼aHydraulic engineering
■650 4▼aMechanics
■650 4▼aThermodynamics
■690 ▼a0986
■690 ▼a0218
■690 ▼a0346
■690 ▼a0348
■71020▼aThe Pennsylvania State University.
■7730 ▼tDissertations Abstracts International▼g86-03B.
■790 ▼a0176
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17162905▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


