Numerical investigation of the effect of fluid pressurization rate on laboratory-scale injection-induced fault slip.

ABSTRACT: The effect of normal stress variations on fault frictional strength has been extensively characterized in laboratory experiments and modelling studies based on a rate-and-state-dependent fault friction formalism. However, the role of pore pressure changes during injection-induced fault reactivation and associated frictional phenomena is still not well understood. We apply rate-and-state friction (RSF) theory in finite element models to investigate the effect of fluid pressurization rate on fault (re)activation and on the resulting frictional slip characteristics at the laboratory scale. We consider a stepwise injection scenario where each fluid injection cycle consists of a fluid pressurization phase followed by a constant fluid pressure phase. We first calibrate our model formulation to r

SUBMITTER: Hutka GA 

PROVIDER: S-EPMC10023684 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature