Temperature Extended-Two-Fluid Tracking (txTFT) Method for Grouting Simulation in High-Temperature Flowing Water

Abstract

Aiming at the treatment problem for water inflow in a high geothermal environment, we proposed a grouting simulation method in high-temperature flowing water: temperature extended-two-fluid tracking (txTFT) method. First, a transport model for solving the residence time of slurry was derived. Furthermore, a temperature transport model was established to describe the heat transfer between slurry and water. Finally, according to the fitted equation of slurry viscosity with residence time and temperature, the fine characterization of slurry viscosity was realized, and then the whole process simulation of grouting was realized. This method was used to reveal the blocking mechanism for grouting in high-temperature flowing water of rock fractures. The results show that high-temperature water limited the parallel-flow diffusion of slurry and increased the counterflow diffusion and transverse diffusion of slurry. The higher the water temperature, the larger the grouting rate, and the lower the inlet pressure, the better the blocking effect of flowing water. The research results can provide theoretical guidance and application value for the grouting treatment of water inflow in a high geothermal environment.