摘要
为探究海底高压输油管道油品泄漏后在水体中的扩散规律,对水深为20 m的管道,建立二维泄漏扩散模型,采用流体体积法,模拟不同运行工况下的海底输油管道泄漏扩散过程。对比分析运行压力、水流速度以及泄漏孔位置对油品扩散范围的影响,结果表明:运行压力<3 MPa的输油管道正上方发生小孔泄漏时,溢油到达水体表面的时间随管道运行压力的上升而缩短;如果管道运行压力>3 MPa,随着管道运行压力的上升,油品到达水体表面所需的时间基本不再变化;不同管道运行压力下的输油管道侧方发生小孔泄漏时,泄漏油品到达水体表面所需时间相近,均为30~34 s,且泄漏后的相同时间内管道运行压力越大,油品向下游的迁移距离越远。本研究对海底高压管道泄漏的应急抢险具有一定指导意义。
In order to explore the diffusion law of oil leakage in the submarine high-pressure oil pipeline,a two-dimensional leakage diffusion model is established for the pipeline with a water depth of 20 m,and the fluid volume method is adopted to simulate the leakage diffusion process of the submarine oil pipeline under different operating conditions.The influence of pipeline operating pressures,water flow speeds,and leak hole positions on the diffusion range of crude oil is compared and analyzed,results show that when a small hole occurs above the pipeline with an operating pressure of less than 3 MPa,the time required for the leaking oil to reach the water surface decreases with the increase of pipeline operating pressure,if the operating pressure is greater than 3 MPa,as the operating pressure rises,the time required for the leaking oil to reach the water surface basically does not change.When the small hole leakage occurs at the side of the oil pipeline under different operating pressures,the time required for the leaking oil to reach the water surface is similar,all about 30~34 s,and the greater the operating pressure of the pipeline in the same time after leakage,the farther the migration distance of the oil to the downstream.This study can provide a reference for emergency rescue of submarine highpressure pipeline leakage.
作者
柴冲
侯磊
于巧燕
王瑞
李延豪
肖开喜
CHAI Chong;HOU Lei;YU Qiaoyan;WANG Rui;LI Yanhao;XIAO Kaixi(College of Mechanical and Transportation Engineering,China University of Petroleum(Beijing);National Engineering Laboratory for Pipeline Safety,China University of Petroleum(Beijing);North Pipeline Company,PipeChina)
出处
《油气田地面工程》
2022年第4期63-70,共8页
Oil-Gas Field Surface Engineering
基金
中国石油天然气集团有限公司-中国石油大学(北京)战略合作科技专项:“一带一路”海外长输管道完整性关键技术研究与应用(ZLZX2020-05)。
关键词
海底管道
小孔泄漏
扩散模型
数值模拟
油品迁移距离
submarine pipeline
small hole leakage
diffusion model
numerical simulation
oil migration distance
