An Improved Embedded Discrete Fracture Model with Fracture Growth for Water-Induced Fracture Simulation in Low Permeability Reservoirs

Abstract Water injection is often used to supply formation energy in low permeability reservoirs. A lot of field data shows that fractures nearby the wellbores may extend hundreds meters because poor injectability which called water-induced fractures. The presence these significantly changes flow injected water thus affecting development effects. However, few studies reservoir numerical simulation methods have been presented simulate dynamic long-term waterflooding process. This study based on embedded discrete fracture model (EDFM) system has less dependence grid system. By improving preprocessing algorithm, growth can be considered EDFM (dEDFM). new method provides an innovative idea for propagation by attaching elements original once failure criterion satisfied. Meanwhile, there no need calculate stress situ provided, so computational efficiency greatly improved compared with fluid-solid coupling method. Besides, dEDFM a flexible way handling elements, it suitable simulation. Results show speed influenced matrix permeability, stress, and intensity, if propagate faster than waterfront movement velocity, changing law content rate rising production wells different directions will different. contribution this work lies efficient engineers deal since when comes simulation, helpful prediction adjustment