A FE-DE-FV Parallel Computing Method Based on OpenMP for the Hydraulic Fracturing

With the continuous increase of global energy demand, unconventional oil and gas resources such as shale and tight reservoirs have occupied an important position in the global energy structure. Large-scale hydraulic fracturing is the main method used to extract shale and tight reservoirs. However, because hydraulic fracturing is affected by complex in-situ stress and reservoir heterogeneity, the generation and propagation of hydraulic fractures are complicated. In this paper, a finite element-discrete element-finite volume (FE-DE-FV) parallel computing method based on Open Multi-Processing (OpenMP) is proposed to accurately and efficiently simulate hydraulic fracturing. This parallel computing method can be effectively applied in practical engineering. The high efficiency of parallel computation is verified and numerical simulations under different in-situ stress conditions are analyzed in this paper. The results show that the FE-DE-FV parallel computing method can accurately and efficiently simulate hydraulic fracturing.