湿气管道清管周期确定方法的适应性分析  

Analysis on adaptability of determination methods for pigging cycle of wet-gas pipeline

作　　者：万宇飞 邓道明[2] 李立婉 刘春雨 程琳 王冰月 陈正文 黄岩 WAN Yufei;DENG Daoming;LI Liwan;LIU Chunyu;CHENG Lin;WANG Bingyue;CHEN Zhengwen;HUANG Yan(Tianjin Branch,CNOOC Ltd;College of Mechanical and Transportation Engineering,China University of Petroleum(Beijing);Tianjin Institute of China Petroleum Engineering&Construction Project Management Company)

机构地区：[1]中海石油(中国)有限公司天津分公司,300459 [2]中国石油大学(北京)机械与储运工程学院 [3]中油工程项目管理公司天津设计院

出　　处：《油气储运》2021年第3期339-345,共7页Oil & Gas Storage and Transportation

基　　金：国家科技重大专项“渤海油田高效开发示范工程”(2016ZX05058004-003)。

摘　　要：湿气管道在实际运行中,需要基于某些方法确定清管周期,以保证管输效率。为研究国内常用清管周期确定方法的适应性,对最小输气效率法、最大允许压降法、最大积液量法存在的不足进行剖析,并基于2条实际管道,重点研究了清管后管线输送效率和积液量的变化规律。结果表明:当利用最大积液量法时,决定清管周期的关键因素是清管液塞量而不是管内积液量;通过静态积液量确定清管周期的做法具有一定的局限性;当管道输送量较大时,利用最小输气效率法和最大允许积液量法得到的清管周期均为无限大,无法有效应用;对于实际管道,无论是最小输气效率法还是最大积液量法,得到的清管周期都过于短暂,不能用于指导现场清管周期的确定。In actual operation,the pigging period of wet-gas pipeline should be determined by some methods to guarantee the efficiency of pipeline transportation.In order to study the adaptability of common determination methods for pigging cycle of wet-gas pipeline in China,the disadvantages of minimum gas transmission efficiency method,maximum allowable pressure drop method and maximum liquid inventory method were analyzed.Additionally,the variation rules of pipeline transportation efficiency and liquid inventory after pigging were emphatically studied based on two actual pipelines.The results show that the key factor to determine the pigging cycle is the volume of liquid slug as a result of pigging rather than the liquid inventory in pipeline when the maximum liquid inventory method is adopted,and it is limited to determine the pigging cycle by static liquid inventory.In the case of large throughput of pipeline,the minimum gas transmission efficiency method and the maximum allowable liquid inventory method are also limited for the pigging cycle obtained is infinite.For actual pipelines,the pigging cycle obtained by the minimum gas transmission efficiency method or the maximum liquid inventory method is too short,which cannot provide guidance for determination of field pigging cycle.

关 键 词：湿气管道 清管 周期 适应性 效率 积液量 

分 类 号：TE832[石油与天然气工程—油气储运工程]