Extended-FEM analysis of injection-induced slip on a fault with rate-and-state friction: Insights into parameters that control induced seismicity

dc.contributor.authorHosseini, Navid
dc.contributor.authorPriest, Jeffrey
dc.contributor.authorEaton, David
dc.descriptionThis version of the article has been accepted for publication, after peer review and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: http://dx.doi.org/10.1007/s00603-023-03283-6
dc.description.abstractThe extended finite element method (X-FEM) is utilised to simulate the behavior of a heterogeneous fault characterized by rate-state frictional rheology, embedded within a poroelastic medium. The displacement and pore-pressure fields that are discontinuous across the fault are computed using X-FEM, by enriching the standard finite element approximation with additional degrees of freedom for elements intersected by the fault. We investigate a Mw 4.1 injection-induced earthquake in western Canada; this model incorporates depth-varying rate-slip behavior wherein a high-pressure zone due to hydraulic fracturing stimulation intersects the fault within a stable layer, producing aseismic slip that progressively loads an unstable fault region, thereby triggering dynamic rupture. Parametric studies using our numerical approach provide insights into the influence of rate-state parameters on fault activation, as well as hydraulic properties of a damage zone that surrounds the fault. Results confirm that aseismic slip near the injection zone propagates outwards to seismogenic unstable regions of the fault. The coseismic slip profile, seismic moment, and slip latency are determined by the difference a − b for rate-state parameters of the unstable fault regions. Hydraulic diffusivity in the damage zone controls the rate of pore-pressure diffusion along the fault, which affects timing of the initial seismic event and aftershock productivity.
dc.description.grantingagencyNatural Sciences and Engineering Research Council (NSERC)
dc.description.sponsorshipThis work was funded by NSERC Alliance Grant ALLRP 548576-2019 entitled Dynamics of fault activation by hydraulic fracturing: Insights from new technologies, with partners ARC Resources, Ltd., Canadian Natural Resources Limited, ConocoPhillips Canada, Ovintiv, Tourmaline Oil Corp. Geoscience BC, Nanometrices and OptaSense.
dc.identifier.citationHosseini, N., Priest, J. A., & Eaton, D. W. (2023). Extended-FEM Analysis of Injection-Induced Slip on a Fault with Rate-and-State Friction: Insights into Parameters that Control Induced Seismicity. Rock Mechanics and Rock Engineering. https://doi.org/10.1007/s00603-023-03283-6
dc.publisher.facultySchulich School of Engineeringen
dc.publisher.institutionUniversity of Calgaryen
dc.rightsUnless otherwise indicated, this material is protected by copyright and has been made available with authorization from the copyright owner. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.en
dc.titleExtended-FEM analysis of injection-induced slip on a fault with rate-and-state friction: Insights into parameters that control induced seismicity
ucalgary.scholar.levelPostdoctoral Associate, Faculty
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
14.08 MB
Adobe Portable Document Format
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
2.25 KB
Item-specific license agreed upon to submission