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Mathematical Modelling of Fault Reactivation Induced by Water Injection

Journal Article · · Minerals
DOI:https://doi.org/10.3390/min9050282· OSTI ID:1572002
 [1];  [2];  [2];  [3]
  1. Canadian Nuclear Safety Commission (CNSC), Ottawa, ON (Canada)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  3. Swiss Federal Nuclear Safety Inspectorate (ENSI) (Switzerland)
+ Show Author Affiliations

Faults in the host rock that might exist in the vicinity of deep geological repositories for radioactive waste, constitute potential enhanced pathways for radionuclide migration. Several processes might trigger pore pressure increases in the faults leading to fault failure and induced seismicity, and increase the faults’ permeability. In this research, we developed a mathematical model to simulate fault activation during an experiment of controlled water injection in a fault at the Mont-Terri Underground Research Laboratory in Switzerland. The effects of in-situ stress, fault shear strength parameters and heterogeneity are assessed. It was shown that the above factors are critical and need to be adequately characterized in order to predict the faults’ hydro-mechanical behaviour.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Nuclear Energy (NE)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1572002
Journal Information:
Minerals, Journal Name: Minerals Journal Issue: 5 Vol. 9; ISSN MBSIBI; ISSN 2075-163X
Publisher:
MDPICopyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

58 GEOSCIENCES
fault activation
mathematical model
poromechanics