Hydraulic Fracturing Induced Seismicity Simulation For Egs Development: Insights From Laboratory Scale

To enhance the understanding of induced seismicity during Enhanced Geothermal System (EGS) development. In this paper, we present a method to simulate induced seismicity. First, we use a true-triaxial apparatus to monitor hydraulic fracturing induced Acoustic Emission (AE) events in the laboratorial EGS reservoir environment. Then, we assume that AEs are mainly triggered by a diffusive process of pore pressure perturbation. To trigger AEs, the strength caused by fluid injection must exceed critical pressures. Based on the assumptions, we establish numerical models for AE modelling. Characteristics of spatiotemporal evolutional process for the numerical AEs clouds are used to compare with those in laboratory experiments. The numerical simulations consequences are consistent with laboratorial experiments.