Effect of Porosity and Permeability Evolution on Injection-Induced Aseismic Slip

Models of Injection‐Induced Aseismic Slip on Height‐Bounded Faults in the Delaware Basin Constrain Fault‐Zone Pore Pressure Changes and Permeability

“…Slip begins after a quiescent period of approximately 170 days, consistent with other studies (Dublanchet, 2019; Larochelle et al., 2021; Yang & Dunham, 2021). During this quiescent period, pressure at the injector increases and diffuses to other parts of the fault, decreasing the effective normal stress.…”

Hydro-mechanical earthquake cycles in a poro-visco-elasto-plastic fluid-bearing fault structure

“…The proposed setup is rather simple, but it can be applied to investigate, e.g., fluid-driven swarms and foreshock sequences (e.g., Ross et al, 2020;Miller, 2020). The developed methodology presents a promising avenue for investigating slip that occurs in response to fluid injection into a permeable fault governed by either rate-strengthening yield strength or rate-and-state friction (e.g., Yang and Dunham, 2021). Future work will also focus on more realistic scenarios of geologic faults, which will allow to investigate the full spectrum of slip behaviour observed in subduction zones and strike-slip faults (e.g., Jolivet and Frank, 2020;Behr and Bürgmann, 2021).…”

“…The propagation of fluid-driven shear cracks, the evolution of pore pressure, and the poroelastic response of faults, have been subjects of interest for decades in the earthquake modeling community (e.g., Rice and Cleary, 1976;Rice, 1992;Dunham and Rice, 2008;Rudnicki and Rice, 2006;Cruz-Atienza et al, 2018;Heimisson et al, 2019;Zhu et al, 2020;Petrini et al, 2020). Recent modeling efforts have mostly focused on the stability of frictional slip when a fluid is locally injected and diffuses within a fault (Bhattacharya and Viesca, 2019;Cappa et al, 2018;Garagash and Germanovich, 2012;Larochelle et al, 2021;Yang and Dunham, 2021), or when fluid injection initiates shear cracks on a strengthening rate-and-state frictional fault (Dublanchet, 2019). Despite the apparent relevance of fluid-driven slow and fast slip transients in a wide variety of natural and anthropogenic environments, the spatio-temporal evolution of sequences of seismic and aseismic slip in response to pore-fluid evolution remains poorly constrained.…”

Self-similar fault slip in response to fluid injection

“…2020; Garagash 2021), or strictly stable, aseismic slip (Rutqvist et al. 2007; Garipov, Karimi-Fard & Tchelepi 2016; Bhattacharya & Viesca 2019; Dublanchet 2019; Yang & Dunham 2021). In addition, there has been substantial focus on fluid-involved feedback mechanisms during seismic or aseismic fault rupture, in which the role of fluids is in response to sliding such that rupture is fluid assisted or fluid inhibited.…”

“…In addition, there has been substantial focus on fluid-involved feedback mechanisms during seismic or aseismic fault rupture, in which the role of fluids is in response to sliding such that rupture is fluid assisted or fluid inhibited. These including dilatancy (Rice 1973; Brantut 2021; Yang & Dunham 2021), thermal pressurization by frictional heating (Rice 2006; Noda, Dunham & Rice 2009; Schmitt, Segall & Matsuzawa 2011; Garagash 2012; Viesca & Garagash 2015) and chemical decomposition (Platt, Viesca & Garagash 2015). Within this body of work, solutions are nearly entirely numerical.…”