摘要
以胜利油田CB306井组平台为例,运用大涡模拟(LES)方法对海底管道立管系统弯管段周围流场进行了模拟分析,结果表明:海流流速在立管两侧增大,在立管后方形成交替脱落的漩涡;立管后方形成的三维立涡成倒锥形,上部漩涡比下部漩涡先脱离立管;三维立涡底部海水对海底的剪切作用及对海底沉积物的提升作用最强,这也是海底冲淘作用不断加剧的根本原因。
Using the large eddy simulation （LES） technique, simulation of the flow field around the elbow in riser system of subsea pipeline is conducted as a case study of CB 306 well group platform in Shengli oilfield. The results show that the velocity of ocean current is enhanced both sides of riser and alternately shed vortex are formed after riser; 3D stand vortex behind riser likes headstand cone; the topside vortex shed earlier than underside from the riser. The shear action and lifting affect on sediments of subsea are most powerful on the bottom of 3D stand vortex. That is the main reason of seabed scouring being intensified continuously.
出处
《中国海上油气（工程）》
2006年第4期285-288,共4页
China Offshore Oil and Gas
关键词
立管系统弯管段
流场分析
大涡模拟
三维立涡
海底冲淘
CB
306井组平台胜利油田
elbow in riser system
flow field analysis
large eddy simulation （LES）
3D stand vortex
seabed scouring
CB 306 well group platform
Shengli oilfield
