Diffusion simulation and safety assessment of oil leaked in the ground

Oil leaked in the ground causes pollution of land and groundwater, and even leads to an explosion. Therefore, it is significant to make a research on safety assessment of diffusion of oil in the ground after oil leakage accident happened. Taken a perforation-caused leakage accident of oil in buried piping in China as an example, the computational fluid dynamics method of multiphase flow in porous media was used to determine the distribution of leaked oil in the ground in this paper. Then, an onsite drilling test was carried put and it's found that the simulation of distribution of leaked oil agreed with the test result. Finally, on the base of the simulation results, fuzzy synthetic evaluation method was carried out and hazardous areas of oil leaked in the ground were put forward.