川渝页岩气集气管线失效原因分析  

Analysis of failure reason of gas-gathering pipeline in Sichuan-Chongqing shale gas field

作　　者：文崭 杨建英 王彦然 康林 青松铸 Wen Zhan;Yang Jianying;Wang Yanran;Kang Lin;Qing Songzhu(Sichuan Changning Natural Gas Development Co.,Ltd,Chengdu,Sichuan,China;Research Institute of Natural Gas Technology,PetroChina Southwest Oil&Gasfield Company,Chengdu,Sichuan,China;National Energy High-Sour Gas Reservoir Exploitation and R&D Center,CNPC,Chengdu,Sichuan,China;High Sulfur Gas Exploitation Pilot Test Center,CNPC,Chengdu,Sichuan,China;Changning Shale Gas Operation Area,Southern Sichuan Gas District,PetroChina Southwest Oil&Gasfield Company,Chengdu,Sichuan,China)

机构地区：[1]四川长宁天然气开发有限责任公司 [2]中国石油西南油气田公司天然气研究院 [3]国家能源高含硫气藏开采研发中心 [4]中国石油集团公司高含硫气藏开采先导试验基地 [5]中国石油西南油气田公司蜀南气矿长宁页岩气作业区

出　　处：《石油与天然气化工》2021年第4期109-113,共5页Chemical engineering of oil & gas

摘　　要：川渝某页岩气平台集气管线投产后短时间内发生穿孔失效,为找出集气管线腐蚀失效的原因,分析了失效管段所处的腐蚀环境,结合材料理化性能和腐蚀产物形貌成分测试结果,认为输送介质中的CO_(2)和返排液中高含量的硫酸盐还原菌(SRB)是造成管道腐蚀穿孔的重要原因,两者同时参与了腐蚀反应,形成主要由代表性腐蚀产物FeCO_(3)、FeS构成的产物层。在CO_(2)和SRB代谢的共同作用下,集气管线快速腐蚀穿孔。The perforation of a gas-gathering pipeline occurred in short time of a certain platform in Sichuan-Chongqing shale gas field.For finding the reasons of gas pipeline corrosion failure,the corrosive condition was analyzed at first.Then,combined with the physical and chemical properties of materials and the test results of the morphology and composition of corrosion products,the conclusions were gotten.CO_(2) in feed gas and sulfate-reducing bacteria(SRB)in flow back fluid were both main factors for the corrosion failure of gas-gathering pipeline,which participated in corrosion reaction and the corrosion scale mainly composed of FeCO_(3) and FeS was formed.With the effect of CO_(2) and SRB metabolism,pitting of gas-gathering pipeline developed rapidly.

关 键 词：集气管线 失效分析 蚀孔 产物成分 

分 类 号：TE983[石油与天然气工程—石油机械设备]