石油工程
饱和(图论)
泄漏(经济)
管道运输
地质学
多孔性
沉积物
海底管道
磁导率
环境科学
多孔介质
岩土工程
毛细管压力
土壤科学
环境工程
地貌学
化学
生物化学
数学
组合数学
膜
经济
宏观经济学
作者
Xiao Li Liu,Liu Shouming,Zheng Tianyuan,Zhu Chongqiang,Dong‐Sheng Jeng
标识
DOI:10.32908/jmee.v11.2023040301
摘要
Oil leakage from submarine pipelines can cause severe environmental problems and economic losses. In this study, a two-phase immiscible flow model in porous media is proposed to simulate the migration of leaked oil caused by the leakage of a buried submarine pipeline in sandy sediment. The relationship between saturation, pore pressure, and relative permeability of different fluids in porous media is considered in present model, which is distinguished from previous studies. The spilled oil spreads radially from the leakage point into surrounding sediment driven by the leakage velocity. Moreover, it continues to migrate in sediment under the capillary pressure and gravity. Interestingly, the effect of wave-induced transient response on the ultimate migration of spilled oil in a sandy sediment is negligible. However, increasing sediment porosity can greatly enhance the upward migration of leaked oil based on systematically parametric analysis. Meanwhile, the migration rate of leaked oil decreases with increasing oil density or viscosity. The oil-contaminated area significantly expands with the increase of leakage rate. Fitting formulas between dimensionless time required for the leaked oil to reach the overlying seawater and non-dimensional influencing parameters are well established, which can provide useful guidelines for similar disasters.
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