东海某海底管道清管作业实践研究

考虑到实际生产的需求，东海某海底管道需进行清管作业，清管不仅可以提高管输效率，还可以检测管线的完好性。为此，进行了详细清管作业方案的制定，提出了通球作业判定的标准以及通球期间管道运行参数的要求，并运用OLGA软件模拟通球过程，然后根据模拟结果进行了清管作业实践。结果表明:此段管道建议采用渐进式清管；通球期间管道运行参数应保持稳定，当下游平台收到的来液突然增大后，降低海管的进气量至50×104 m3/d；第一至第五次通球模拟结果显示，平台段塞流捕集器的处理能力不能满足清管要求，需有部分段塞流进入下游管线；数值模拟结果在可接受的误差范围内。

Study on the Pigging Operation of a Subsea Pipeline in East China Sea

In view of the actual production requirements, a submarine pipeline pigging operation is needed in the East China Sea. Through pigging operation, not only the efficiency of transportation can be improved, but also the integrity of pipeline can be checked. Therefore, detailed pigging scheme was made. The pigging criteria and requirements of operating parameters were presented. Also, the OLGA software was used to simulate the pigging process. Then the pigging operation was carried out according to the simulation results. The results showed that progressive pigging was suggested and the operating parameters should be kept stable during the pigging. When the downstream platform received a sudden increase in the liquid, the gas intake of the pipeline should be reduced to 50×104 m3/d. The results of the first to fifth pigging simulation showed that the processing capacity of platform slug collector could not meet the requirement of pigging, and some slug flow was required to enter the downstream pipeline. Pigging operation showed that the numerical simulation results were within acceptable error range.