长输管道站场区域阴极保护馈电试验结果分析  

Analysis on the feeding test results of regional cathodic protection in long-distance pipeline station

作　　者：马贵利 刘海峰[2] 王浩[3] 陈虹锦 彭磊 汤雨霖 魏群坤 袁豹 何炆忆 陈彬源 MA Guili;LIU Haifeng;WANG Hao;CHEN Hongjin;PENG lei;TANG Yulin;WEI Qunkun;YUAN Bao;HE Wenyi;CHEN Binyuan(Pipeline Department of PetroChina Qinghai Oilfield Company,Golmud,Qinghai,816000,China;PetroChina Southwest Oil&Gasfield Company,Chengdu,Sichuan,610051,China;Shunan Gas Mine of PetroChina Southwest Oil&Gasfield Company,Luzhou,Sichuan,646000,China;Sichuan Huayou Group Co.,Ltd.,Chengdu,Sichuan,610023,China;CPECC Southwest Company,Chengdu,Sichuan,610041,China)

机构地区：[1]中国石油青海油田公司管道处,青海格尔木816000 [2]中国石油西南油气田公司,四川成都610051 [3]中国石油西南油气田公司蜀南气矿,四川泸州646000 [4]四川华油集团有限责任公司,四川成都610023 [5]中国石油工程建设有限公司西南分公司,四川成都610041

出　　处：《天然气与石油》2022年第6期94-100,共7页Natural Gas and Oil

基　　金：中国石油集团工程股份有限公司科研课题“天然气有机硫深度脱除工艺技术研究”(2018ZYGC-02-01)。

摘　　要：对已建站场进行区域阴极保护系统改造时,若仅参照类似工程项目方案和经验进行,则可能造成站内部分埋地管道或设备不能得到充分的阴极保护,导致管道上的管地电位分布不均,同时还可能对站场周边埋地钢质管道形成杂散电流干扰,影响站场周边管道阴极保护系统的正常运行。通过在某站场开展现场馈电试验时不断变换区域阴极保护系统通电点、馈电点位置,分析研究了区域阴极保护系统输出电压、输出电流、通电点位置等因素对区域阴极保护效果的影响;同时对区域阴极保护采用牺牲阳极方式的有效性进行了分析,发现牺牲阳极使用数年后,接地电阻会增大,失去阴极保护效果。根据馈电试验分析结果,提出了站场区域阴极保护系统整改过程中应采取合理布置通电点和馈电点的技术措施,同时认为在长输管道站场区域阴极保护系统中应谨慎使用牺牲阳极。研究结果可为今后长输管道站场区域阴极保护系统的改造提供借鉴。If the reconstruction of regional cathodic protection for existing stations is only based on previous project design schemes and experience of similar projects, some facilities may not have sufficient cathodic protection and the potential distribution may be uneven. It may also cause stray current interference for buried steel pipeline around the station, affecting the normal operation of neighbouring cathodic protection systems. This paper carried out field feeding test in one of the stations. By changing the location of power energization point and feeding point, this paper analyzed the effect of output voltage, output current, location of energization point on the regional cathodic protection system. This paper also analyzed the effectiveness of sacrificial anode for regional cathodic protection, and found that after several years in service, the ground resistance increased and the sacrificial anode could not provide effective cathodic protection. Based on the feeding test results, it is proposed that power energization points and feeding points should be optimally arranged during the rectification of the cathodic protection system in the pipeline station region. It is also recognized that sacrificial anodes should be used cautiously in the cathodic protection system of the long distance pipeline station region. The research results can provide a reference for the reconstruction of cathodic protection system in the long distance pipeline station region in the future.

关 键 词：馈电试验 区域阴极保护 保护电位 牺牲阳极 分布式深井阳极 

分 类 号：TE988[石油与天然气工程—石油机械设备]