海底油气混输管道中清管段塞的控制方法

Control Methods for the Pigging Shug in the Subsea Multiphase Pipeline

随着海洋油气田开发的快速发展,海上油田油气集输系统越来越复杂,海底油气混输管道越来越多,输送距离也越来越长。海底油气混输管道操作条件的改变(如管道的停输、再启动、清管操作、输量变化等)、地势的起伏等可能形成管内严重段塞,影响下游设备运行甚至造成危害。针对某海上油田开发中油气混输管道运行遇到的段塞流问题,分析对比了3种清管工况清管段塞流量,以及下游平台接收清管段塞流的流程,计算了段塞流捕集器台数及尺寸,并提出了控制段塞的方法。旨在为进一步开展海底油气混输管道严重段塞流的研究提供借鉴,为工程实践提供参考。

With the rapid development of the offshore oil and gas oilfield, the gatheringand transportation system became more and more complicated, and more multiphase subsea pipelines with longer distance were put into operation. The severe slugging was caused by changes of operating conditions (shutdown, restarting up, pigging, and throughput variation) and the terrain ups and downs for the multiphase subsea pipeline, leading to interfering the downstream equipment even bringing about damage. For the slugging in the operation of the multiphase subsea pipeline in thedevelopment of one offshore oilfield, the flow rate and the process to receive the slug flow for the downstream platform in three kinds of wonting conditions of pigging were analyzed and compared, numbers and size of the trap were calculated, and control methods of slugging were put forward It would provide a reference for the further research and engineering practice.