海洋平台海管立管悬空方案设计研究

Research on ocean plain design of marine riser suspension scheme of offshore platform

海底管线是海洋平台物流进出的主要通道,是海洋平台安全生产的重要设施。海管立管作为海管与平台连接的关键节点,工作环境最为恶劣。现有海管立管的设计是按照立管直底部与海床面完全贴合的工况开展设计计算,出现悬空情况时,需要采取回填措施。由于回填工作难度大、施工及维护费用高,文章通过软件模拟计算,证明立管底部悬空的不影响海管安全使用,计算结果与实际情况匹配,从而实现立管安装、运行费用的大大降低。

Submarine pipeline is the main passage of offshore platform in and out,and it is an important facility for safe production of offshore platform. As the key node of the connection between the sea pipe and the platform,the riser works in the worst working environment. The design calculation is carried out according to the condition that the vertical bottom of the riser fits perfectly with the seabed surface,and backfill measures should be taken in case of suspension. Because the backfill work is difficult and the cost of construction and maintenance is high,this paper proves that the hovering at the bottom of the riser does not affect the safe use of the sea pipe,and the calculation result matches the actual situation,thus realizing the installation of the riser. The operation cost is greatly reduced.