Particle-Based DEM Model for Simulating Brittle Cracks Evolution in Rock-like Materials During the Tensional Fracturing Process

Abstract

The aim of this study was to recreate cracks network in a rock material during hydraulic fracturing process using the Discrete Element Method implemented in the ESyS-Particle software. We have investigated the behavior of brittle material under tensional stress induced by fracking fluid pumped either with constant velocity or with constant pressure. With DEM approach it was possible to check how the fluid expands inside the rock formation under different conditions. Consequently, we have calculated the injection velocities for different values of pressure as well as a spatial extension of cracks in the material. It gave an insight into hydraulic fracturing process which is possible only using computer simulations.