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Title: Field-scale fault reactivation experiments by fluid injection highlight aseismic leakage in caprock analogs: Implications for CO2 sequestration

Journal Article · · International Journal of Greenhouse Gas Control

Observations on tens-of-meter scale experiments of fault activation by fluid injection conducted in shales allow exploring how aseismic and seismic events may jeopardize the integrity of a sealing caprock overlying a CO2 sequestration reservoir. We contrast the behavior of shale faults with another set of experiments conducted in carbonates. Significant fluid leakage occurs along the initially low-permeability shale faults when rupture is activated. Most of the leakage pathway closes when fluid injection ceases and fluid pressure drops. Dilatant slip on the fault plane alone does not explain the observed leakage behavior, which is also caused by fault opening favored by the softness of the shale, and by the structure of the fault zone that prevents fluids from diffusing into the adjacent damage zone. Experiments show a large amount of aseismic deformation. Small-magnitude seismicity (Mw < -2.5) is observed outside the pressurized leakage patch. Stress transferred from this aseismic deformation patch can build up to stress-criticality and favor seismicity. Thus, in terms of fault activation in caprocks, aseismic fault slip leading to increased permeability and a loss of seal integrity is of great concern.

Research Organization:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1901775
Journal Information:
International Journal of Greenhouse Gas Control, Vol. 111; ISSN 1750-5836
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (79)

Frictional Properties and Seismogenic Potential of Caprock Shales journal November 2020
Mineralogical Controls on Frictional Strength, Stability, and Shear Permeability Evolution of Fractures journal May 2018
A review of recent developments concerning the structure, mechanics and fluid flow properties of fault zones journal November 2010
Can Fault Leakage Occur Before or Without Reactivation? Results from an in Situ Fault Reactivation Experiment at Mont Terri journal July 2017
Multiscale seismic signature of a small fault zone in a carbonate reservoir: Relationships between VP imaging, fault zone architecture and cohesion journal July 2012
Carbon capture and storage, geomechanics and induced seismic activity journal December 2016
Seismicity triggered by fluid injection-induced aseismic slip journal June 2015
An Experiment in Earthquake Control at Rangely, Colorado journal March 1976
The Mechanical Coupling of Fluid-Filled Granular Material Under Shear journal June 2011
Effects of fault-zone architecture on earthquake magnitude and gas leakage related to CO 2 injection in a multi-layered sedimentary system : Modeling and Analysis: Effects of fault architecture related to CO journal January 2014
Seismic rupture and ground accelerations induced by CO2 injection in the shallow crust: CO2 induced seismic rupture journal August 2012
Shale fault zone structure and stress dependent anisotropic permeability and seismic velocity properties (Opalinus Clay, Switzerland) journal March 2021
Seismic characteristics of fluid escape pipes in sedimentary basins: Implications for pipe genesis journal August 2015
Nucleation of slip-weakening rupture instability in landslides by localized increase of pore pressure: PORE PRESSURE INDUCED RUPTURES journal March 2012
A survey of 71 earthquake bursts across southern California: Exploring the role of pore fluid pressure fluctuations and aseismic slip as drivers: SEISMICITY BURSTS IN SOUTHERN CALIFORNIA journal May 2006
Causal mechanism of injection-induced earthquakes through the Mw 5.5 Pohang earthquake case study journal May 2020
Fault structure, stress, or pressure control of the seismicity in shale? Insights from a controlled experiment of fluid-induced fault reactivation: Seismicity Controlling Factors in Shale journal June 2016
On the Relationship Between Fault Permeability Increases, Induced Stress Perturbation, and the Growth of Aseismic Slip During Fluid Injection journal October 2018
Induced Seismicity journal May 2018
CO2 migration and pressure evolution in deep saline aquifers journal September 2015
Can the maintenance of overpressured fluids in large strike-slip fault zones explain their apparent weakness? journal January 2001
How faulting keeps the crust strong journal January 2000
Geomechanical effects on CO2 leakage through fault zones during large-scale underground injection journal January 2014
Permeability Variations Associated With Fault Reactivation in a Claystone Formation Investigated by Field Experiments and Numerical Simulations journal February 2018
Aseismic Motions Drive a Sparse Seismicity During Fluid Injections Into a Fractured Zone in a Carbonate Reservoir: Injection-Induced (A)Seismic Motions journal October 2017
Fluid flow in fault zones from an active rift journal May 2014
Comparative study of methods to estimate hydraulic parameters in the hydraulically undisturbed Opalinus Clay (Switzerland) journal February 2017
Fault Permeability and CO2 Storage journal July 2017
Sealing Shales versus Brittle Shales: A Sharp Threshold in the Material Properties and Energy Technology Uses of Fine-Grained Sedimentary Rocks journal September 2015
Estimating perturbed stress from 3-D borehole displacements induced by fluid injection in fractured or faulted shales journal March 2020
1000 m long gas blow-out pipes journal May 2011
In situ observations on the coupling between hydraulic diffusivity and displacements during fault reactivation in shales: PERMEABILITY OF AN ACTIVATED SHALE FAULT journal November 2015
Calcite veins as an indicator of fracture dilatancy and connectivity during strike-slip faulting in Toarcian shale (Tournemire tunnel, Southern France) journal February 2016
An experimental study of the flow of gas along synthetic faults of varying orientation to the stress field: Implications for performance assessment of radioactive waste disposal: GAS FLOW ALONG FAULTS journal May 2015
Stress drop variations of induced earthquakes at the Basel geothermal site: STRESS DROP OF INDUCED EARTHQUAKES IN BASEL journal May 2011
Nucleation and arrest of dynamic slip on a pressurized fault: NUCLEATION ON PRESSURIZED FAULT journal October 2012
Surface Monitoring of Microseismicity at the Decatur, Illinois, CO 2 Sequestration Demonstration Site journal June 2015
Geologic carbon storage is unlikely to trigger large earthquakes and reactivate faults through which CO 2 could leak journal April 2015
Seismic responses to fluid pressure perturbations in a slipping fault: Fault reactivation by fluid pressures journal May 2015
An international model comparison study of controlled fault activation experiments in argillaceous claystone at the Mont Terri Laboratory journal December 2020
The effects of lateral property variations on fault-zone reactivation by fluid pressurization: Application to CO2 pressurization effects within major and undetected fault zones journal May 2014
Seismicity related to the hydraulic stimulation of GRT1, Rittershoffen, France journal January 2017
Transferability of geoscientific information from various sources (study sites, underground rock laboratories, natural analogues) to support safety cases for radioactive waste repositories in argillaceous formations journal January 2008
Field characterization of elastic properties across a fault zone reactivated by fluid injection: Fault Elastic Properties journal August 2017
Characterization of fluid transport properties of reservoirs using induced microseismicity journal January 2002
An experimental study of the potential for fault reactivation during changes in gas and pore-water pressure journal October 2016
Analysis of tectonic structures and excavation induced fractures in the Opalinus Clay, Mont Terri underground rock laboratory (Switzerland) journal September 2011
Permeability of a fault zone crosscutting a sequence of sandstones and shales and its influence on hydraulic head distribution in the Chatsworth Formation, California, USA journal November 2014
Spontaneous formation of fluid escape pipes from subsurface reservoirs journal July 2018
Analysis of the induced seismicity of the Lacq gas field (Southwestern France) and model of deformation journal March 2008
Stabilization of fault slip by fluid injection in the laboratory and in situ journal March 2019
Fault sealing and caprock integrity for CO<sub>2</sub> storage: an in situ injection experiment journal February 2021
Frictional properties of shale reservoir rocks: SHALE FRICTIONAL PROPERTIES journal September 2013
Analysis of the Passive Seismic Monitoring Performance at the Rousse CO2 Storage Demonstration Pilot journal January 2014
Earthquake triggering and large-scale geologic storage of carbon dioxide journal June 2012
Pore pressure, stress increase, and fault weakening in low-angle normal faulting journal January 1992
Permeability Evolution of Slowly Slipping Faults in Shale Reservoirs journal November 2017
ISRM Suggested Method for Step-Rate Injection Method for Fracture In-Situ Properties (SIMFIP): Using a 3-Components Borehole Deformation Sensor journal December 2013
Fault-controlled CO 2 leakage from natural reservoirs in the Colorado Plateau, East-Central Utah journal October 2014
Maximum magnitude earthquakes induced by fluid injection: Limits on fluid injection earthquakes journal February 2014
Fault zone architecture and permeability structure journal January 1996
Modeling of rock friction: 1. Experimental results and constitutive equations journal January 1979
Fault activation and induced seismicity in geological carbon storage – Lessons learned from recent modeling studies journal December 2016
Potentially induced earthquakes in Oklahoma, USA: Links between wastewater injection and the 2011 Mw 5.7 earthquake sequence journal June 2013
Sharp increase in central Oklahoma seismicity since 2008 induced by massive wastewater injection journal July 2014
Assessing induced seismicity risk at CO2 storage projects: Recent progress and remaining challenges journal June 2016
Scaly fabric and slip within fault zones journal February 2019
Basin-scale hydrogeologic impacts of CO2 storage: Capacity and regulatory implications journal December 2009
Earthquake swarms driven by aseismic creep in the Salton Trough, California: OBSIDIAN BUTTES SWARM journal April 2007
Structural and hydrogeological characterisation of the excavation-disturbed zone in the Opalinus Clay (Mont Terri Project, Switzerland) journal August 2004
A novel and versatile apparatus for brittle rock deformation journal February 2014
Dilatancy, compaction, and slip instability of a fluid-infiltrated fault journal November 1995
On the effective stress law for rock-on-rock frictional sliding, and fault slip triggered by means of fluid injection
  • Rutter, Ernest; Hackston, Abigail
  • Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 375, Issue 2103 https://doi.org/10.1098/rsta.2016.0001
journal August 2017
Contrasting Mechanical and Hydraulic Properties of Wet and Dry Fault Zones in a Proposed Shale‐Hosted Nuclear Waste Repository journal February 2019
The seismo-hydromechanical behavior during deep geothermal reservoir stimulations: open questions tackled in a decameter-scale in situ stimulation experiment journal January 2018
The role of aseismic slip in hydraulic fracturing–induced seismicity journal August 2019
Induced seismicity and its implications for CO2 storage risk journal January 2011
The biases and trends in fault zone hydrogeology conceptual models: global compilation and categorical data analysis journal September 2016
What controls the mechanical properties of shale rocks? – Part II: Brittleness journal August 2016