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Title: Two sides of a fault: Grain-scale analysis of pore pressure control on fault slip

Journal Article · · Physical Review. E
 [1];  [2]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Uppsala Univ. (Sweden); Wuhan Univ. (China)
  2. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

Pore fluid pressure in a fault zone can be altered by natural processes (e.g., mineral dehydration and thermal pressurization) and industrial operations involving subsurface fluid injection and extraction for the development of energy and water resources. However, the effect of pore pressure change on the stability and slip motion of a preexisting geologic fault remains poorly understood; yet, it is critical for the assessment of seismic hazard. In this study, we develop a micromechanical model to investigate the effect of pore pressure on fault slip behavior. The model couples fluid flow on the network of pores with mechanical deformation of the skeleton of solid grains. Pore fluid exerts pressure force onto the grains, the motion of which is solved using the discrete element method. We conceptualize the fault zone as a gouge layer sandwiched between two blocks. We study fault stability in the presence of a pressure discontinuity across the gouge layer and compare it with the case of continuous (homogeneous) pore pressure.We focus on the onset of shear failure in the gouge layer and reproduce conditions where the failure plane is parallel to the fault. We show that when the pressure is discontinuous across the fault, the onset of slip occurs on the side with the higher pore pressure, and that this onset is controlled by the maximum pressure on both sides of the fault. In conclusion, the results shed new light on the use of the effective stress principle and the Coulomb failure criterion in evaluating the stability of a complex fault zone.

Research Organization:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
FE0009738; SC0018357
OSTI ID:
1505588
Alternate ID(s):
OSTI ID: 1422001
Journal Information:
Physical Review. E, Vol. 97, Issue 2; ISSN 2470-0045
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (55)

Spanning the scales of granular materials through microscopic force imaging journal March 2015
A bonded-particle model for rock journal December 2004
A review of recent developments concerning the structure, mechanics and fluid flow properties of fault zones journal November 2010
Quantifying Interparticle Forces and Heterogeneity in 3D Granular Materials journal August 2016
Seismicity triggered by fluid injection-induced aseismic slip journal June 2015
Nucleation of frictional instability caused by fluid pressurization in subducted blueschist journal March 2016
Meshless numerical modeling of brittle–viscous deformation: first results on boudinage and hydrofracturing using a coupling of discrete element method (DEM) and smoothed particle hydrodynamics (SPH) journal January 2013
Numerical simulations of granular shear zones using the distinct element method: 1. Shear zone kinematics and the micromechanics of localization journal February 1999
Can the maintenance of overpressured fluids in large strike-slip fault zones explain their apparent weakness? journal January 2001
Impact of CO 2 geological sequestration on the nucleation of earthquakes : CO journal September 2011
3D numerical simulations of fault gouge evolution during shear: Grain size reduction and strain localization journal September 2008
Earthquake slip between dissimilar poroelastic materials journal January 2008
Poromechanics of stick-slip frictional sliding and strength recovery on tectonic faults: POROMECHANICS OF STICK-SLIP journal October 2015
Numerical simulation of the quicksand phenomenon by a 3D coupled Discrete Element - Lattice Boltzmann hydromechanical model: Numerical simulation of the quicksand phenomenon by a 3D coupled Discrete Element - Lattice Boltzmann hydromechanical model
  • Mansouri, Mouloud; El Youssoufi, Moulay Said; Nicot, François
  • International Journal for Numerical and Analytical Methods in Geomechanics, Vol. 41, Issue 3 https://doi.org/10.1002/nag.2556
journal August 2016
Were the May 2012 Emilia-Romagna earthquakes induced? A coupled flow-geomechanics modeling assessment: MODELING THE MAY 2012 EMILIA EARTHQUAKES journal July 2016
Frictional Properties of Sedimentary Rocks and Natural Fault Gouge from the Longmen Shan Fault Zone, Sichuan, China journal October 2010
Meso-mechanical analysis of deformation characteristics for dynamically triggered slip in a granular medium journal July 2012
Discrete particle-continuum fluid modelling of gas–solid fluidised beds journal July 2002
Coupled multiphase flow and poromechanics: A computational model of pore pressure effects on fault slip and earthquake triggering journal May 2014
Direct simulation of fluid-solid mechanics in porous media using the discrete element and lattice-Boltzmann methods journal January 2007
Earthquakes triggered by fluid extraction journal January 1989
Particle Scale Reservoir Mechanics journal September 2002
Ubiquitous weakening of faults due to thermal pressurization journal October 2015
Pore-scale modeling of fluid-particles interaction and emerging poromechanical effects: PORE-SCALE MODELING OF FLUID-PARTICLES INTERACTION
  • Catalano, E.; Chareyre, B.; Barthélémy, E.
  • International Journal for Numerical and Analytical Methods in Geomechanics, Vol. 38, Issue 1 https://doi.org/10.1002/nag.2198
journal June 2013
Injection-Induced Earthquakes journal July 2013
Fragmentation and shear band formation by slow compression of brittle porous media journal November 2016
Earthquake slip weakening and asperities explained by thermal pressurization journal August 2005
Geomechanical analysis of fluid injection and seismic fault slip for the M w 4.8 Timpson, Texas, earthquake sequence : GEOMECHANICS OF FLUID INJECTION TIMPSON journal April 2016
Heating and weakening of faults during earthquake slip: HEATING AND WEAKENING OF FAULTS journal May 2006
Force chain buckling, unjamming transitions and shear banding in dense granular assemblies journal October 2007
Gouge Particle Evolution in a Rock Fracture Undergoing Shear: a Microscopic DEM Study journal February 2013
Frictional response of a thick gouge sample: 1. Mechanical measurements and microstructures journal January 2006
Preferential Mode of gas invasion in sediments: Grain-scale mechanistic model of coupled multiphase fluid flow and sediment mechanics journal January 2009
A numerical investigation of the structure of persistent shear bands in granular media journal December 1991
The internal structure of fault zones: fluid flow and mechanical properties journal January 2008
The Mechanics of Earthquakes and Faulting book January 2012
Seasonal water storage, stress modulation, and California seismicity journal June 2017
Simulating deformations of granular solids under shear journal August 1995
Acoustically induced slip in sheared granular layers: Application to dynamic earthquake triggering: TRIGGERED SLIP IN SHEARED GRANULAR GOUGE journal November 2015
Frictional properties of shale reservoir rocks: SHALE FRICTIONAL PROPERTIES journal September 2013
Stick-slip behavior in a continuum-granular experiment journal December 2015
Rupture Cascades in a Discrete Element Model of a Porous Sedimentary Rock journal February 2014
Fault slip controlled by stress path and fluid pressurization rate: FAULT SLIP DURING FLUID PRESSURIZATION journal May 2016
Modeling of rock friction: 1. Experimental results and constitutive equations journal January 1979
The Denver EarthquakeS journal September 1968
Effective normal stress alteration due to pore pressure changes induced by dynamic slip propagation on a plane between dissimilar materials journal January 2006
Slip instability and state variable friction laws journal December 1983
Microslips as precursors of large slip events in the stick-slip dynamics of sheared granular layers: A discrete element model analysis: 3-D DEM MODELING OF STICK SLIP journal August 2013
Laboratory-Derived Friction laws and Their Application to Seismic Faulting journal May 1998
Shape Factor and Hydraulic Conductance in Noncircular Capillaries journal April 2001
A discrete numerical model for granular assemblies journal March 1979
Earthquake nucleation in weak subducted carbonates journal August 2016
The Mechanics of Earthquakes and Faulting journal June 1993
Structural geology journal June 1993
The Mechanics of Earthquakes and Faulting book December 2018

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