The Impact Analysis on Crude Oil Phase Change to the Migration of Buried Oil Pipelines Leakage Pollution

This paper established mathematic and physic model of buried oil pipelines leaking in porous media of soil. Make use of FLUENT software to simulate crude oil phase change and non-phase change in the soil of cold regions. The result shows that: The temperature over the leakage hole of phase change diffusion process is higher than not considering phase change. The oil phase diffuse to the earth’s surface needs more time. And the speed diffusing to the underground is basically same. The earth surface temperature’s variation of leakage process without crude oil phase change lags behind the process considering phase change.