某油田地面单井管道腐蚀原因分析  

Corrosion Reasons Analysis of Single Well Pipeline in an Oil Field

作　　者：李鹏[1] 蔡锐[2] LI Peng;CAI Rui(Sinopec Key Laboratory for EOR of Fracture Vuggy Reservoir,Sinopec Northwest Oilfield Company,Urumqi 830011,China;State Key Laboratory for Performance and Structure Safety of Petroleum Tubular Goods and Equipment Materials,CNPC Tubular Goods Research Institute,Xi’an 710077,China)

机构地区：[1]中国石油化工股份有限公司西北油田分公司中国石化缝洞型油藏提高采收率重点实验室,乌鲁木齐830011 [2]中国石油天然气集团公司管材研究所石油管材及装备材料服役行为与结构安全国家重点实验室,西安710077

出　　处：《理化检验（物理分册）》2020年第5期39-42,47,共5页Physical Testing and Chemical Analysis(Part A:Physical Testing)

基　　金：中石化科技重大项目(P18022)。

摘　　要：某油田地面单井管道腐蚀严重,穿孔事故频发。通过宏观观察、化学成分分析、金相检验、微观形貌分析及腐蚀产物分析等方法,对穿孔管道的腐蚀原因进行了分析;通过实验室高温高压模拟腐蚀试验,对管道材料的腐蚀模式进行了分析。结果表明:管道腐蚀穿孔原因为高矿化度、高浓度氯离子的地层水中的CO2和H2S气体产生电化学腐蚀所致;此外,管道材料20钢耐腐蚀性能较差也是重要的原因之一。The single well pipeline in an oil field was corrupted seriously,and accidents happened frequently.The macroscopic observation,chemical composition analysis,metallographic examination,micro morphology analysis and corrosion product analysis were carried out to analyze the corrosion reason of the perforated pipe.Corrosion pattern of the pipeline material was studied by high temperature and high pressure simulated corrosion test in laboratory.The results showed that the corrosion and perforation of pipeline was mainly caused by CO2/H2S electrochemical corrosion in formation water with high salinity and high concentration chloride ion.In addition,poor corrosion resistance of pipeline material 20steel was also one of the important reasons.

关 键 词：20钢 单井管道 穿孔 腐蚀 硫化氢 二氧化碳 电化学腐蚀 

分 类 号：TG172.2[金属学及工艺—金属表面处理] TE983[金属学及工艺—金属学]