摘要
从水泥化学角度出发，分析了ＣＯ２在较低温度（〈１１０℃）下对油井水泥石碳化腐蚀的机理，并应用热力学方法计算了油井水泥熟料矿物及水化产物在温环境下受ＣＯ２侵蚀的条件。还针对国内富含ＣＯ２油气田的实际情况，提出了不同地层温度下防止ＣＯ２腐蚀水泥环的措施，推荐了判断ＣＯ２腐蚀程度的参考判据。
The carbonation mechanism of CO2 corrosion on oilwell cement shearth at temperatres lower than 110℃ is analyzed from a cement chemistry point of view, and thecriteria of corrosion are discussed on the basis of thermodynamic principles. Ways to prevent oilwell cement shearth from CO2 corrosion for domestic oilfields with high CO2 concentrations are proposed. A (cited ) criterion for predicting carbonation of the shearth is also recommended.
出处
《西南石油学院学报》
CSCD
1998年第3期68-71,共4页
Journal of Southwest Petroleum Institute
关键词
油井
水泥
固井
二氧化碳
腐蚀
热力学
防护
Oilwell cement
Well cementing
CO2 corrosion
Thermodynamics
Mechanism
