影响埋地输油管道泄漏介质迁移两种因素分析

通过建立埋地输油管道泄漏污染物迁移二维模型,分别分析了泄漏油相、水相在管道不同泄漏孔径和位置发生泄漏时的扩散迁移规律。研究表明:泄漏油水污染物分布由苹果状、U状向椭圆状转变,泄漏孔径越大,泄漏速度亦越大,泄漏到地表的时间也相对提前;管道不同泄漏位置其泄漏油水污染物分布对称轴线不同,且油品在相对靠近地表泄漏时会提前泄漏到地表。本研究可为光缆检漏技术用于检测、定位埋地输油管道的泄漏情况和泄漏位置提供参考。

Analysis on Two Factors for Affecting Leaking Media Migration of Buried Pipeline Leakage

Based on the establishment of a two-dimensional model of contaminant transport of buried pipeline leakage,the diffusion migration of oil and water pollutants under different leakage aperture and location of pipeline was analyzed.The results show that:the distribution of oil and water pollutants changes from the apple shaped,U-shaped to the oval,and the greater the leak aperture,the greater the leakage rate,the earlier the time to leak to the surface is.With the pipeline leakage at different locations,the symmetry axis of the pollutant leakage range will be different,and the oil relatively close to the surface leakage will first leak to the surface.The result can provide reference for application of cable leak detection technology in detecting and locating the buried pipeline leakage situation and leakage location.