CO2埋存井固井水泥环封存效果与其性能参数研究

CO2埋存井固井水泥环封存能力是决定CO2长期有效埋存的关键,影响水泥环封存能力的因素除了井筒周围外部条件外,还与水泥环自身的力学特性有关。首先分析了影响水泥环封存能力的外部因素,并对水泥环受力状态与其力学参数之间的关系进行研究,最后结合外部条件和水泥环自身力学特性,确定出能够满足CO2长期有效埋存的水泥环的力学参数。

The Study on Cement Sheath Sealing Effect and its PerformanceParameters of CO2 Buried Well

Long-term and effective storage of carbon dioxide depend on the seal ability of carbon dioxide buried well cement sheath , the factors affecting cement seal ability is not only related to external conditions around wellbore , also influenced by mechanics performance parameters of cement sheath itself. This paper firstly analyzes the influenced the external factors on cement seal ability , and studies the relationship between the cement sheath stress state and its mechanical parameters , finally combined with the external factors and cement sheath performance of itself , determine the reasonable mechanical parameters that can make the carbon dioxide storage for a long time.