油气田开发中的二氧化碳腐蚀及影响因素

综述了油气田开发中CO2腐蚀的严重性、腐蚀机理及影响因素。CO2腐蚀是一种典型的局部腐蚀，其腐蚀机理主要是腐蚀产物(FeCO3)或结垢产物(CaCO3)在钢铁表面不同覆盖度的区域之间形成了具有很强自催化特性的腐蚀电耦。影响CO2腐蚀的因素较多，包括温度、CO2分压、流速及流型、OH值、腐蚀产物膜、CL，H2S和O2含量等。在实际油气田开发生产中，各种因素都可能同时出现，并相互影响，使CO2腐蚀呈现错综复杂的局面，关于这方面的工作尚待进一步的研究，

Carbon Dioxide Corrosion and Its Influence Factors in Oil/Gas Field Exploitation

This paper reviews the severity, mechanism and influence factors of CO2 corrosion in oil/gas field exploitation,CO2corrosion is a typical local corrosion, The corrosion product (FeCO3) or scale (CaCO3) deposits on different areas of steel. Withdifferent coverage, different areas form some corrosion couples with self-catalytic feature, Many factors affect CO2 corrosion includingtemperature, CO2 fractional pressure, flowing velocity, pH value, corrosion product film, Cl-, content of H2S and O2. Different factorsmay emerge simultaneously, and impact mutually in reality. Thus CO2 corrosion appears complex and deserves research.