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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 Dyn...
Imaging Elastodynamic and Hydraulic Properties of Fractured Rock: Exploring Effects of Dynamic Stressing, Shearing, Fracture Aperture, and Roughness

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자료유형  
 학위논문 서양
최종처리일시  
20250211152110
ISBN  
9798384216025
DDC  
600
저자명  
Wood, Clay Emerson.
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
기타저자  
The Pennsylvania State University.
기본자료저록  
Dissertations Abstracts International. 86-03B.
전자적 위치 및 접속  
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MARC

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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.

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