A mesh adaptive method for dynamic well stimulation

摘要

We utilize the adaptive meshing features of an asynchronous spacetime discontinuous Galerkin (aSDG) FE method to address rock fracturing in reservoir stimulations under high rate loadings. Our aSDG implementation adaptively aligns the element boundaries with crack-path trajectories obtained as a part of the solution and no discontinuous features are introduced within the elements. We propose a novel rate-dependent interfacial damage model to represent fracture processes on crack surfaces while the model incorporates various contact modes under transient settings. Several examples are discussed to demonstrate the effectiveness of our approach in resolving dynamic fracturing driven by the high internal fluid pressure.