论文部分内容阅读
高矿化度地下水和高合CO2、硫酸盐还原菌的地下水，通过溶蚀、化学和膨胀对水泥石进行腐蚀，减低油井寿命。通过特性分析，认为改善水泥石的渗透性，降低水泥石中Ca（OH）2的含量，能从本质上提高水泥石的抗腐蚀能力。在水泥中加入一定比例的硅灰后，使水泥石中Ca（OH）2含量降低，另外，也改变了水泥体系的钙硅比和水化产物的组分，使水泥石结构均匀、致密、孔隙孔径变小、孔隙度降低，使水泥石强度增加，渗透率降低，从而提高了水泥石的抗腐蚀能力。
Highly salinity groundwater and high co-CO2, sulphate-reducing bacteria groundwater corrode cement by erosion, chemistry and swelling to reduce well life. According to the characteristics analysis, it is considered that improving the permeability of cement stone and reducing the content of Ca (OH) 2 in cement stone can improve the anti-corrosion ability of cement stone essentially. After adding a certain proportion of silica fume to the cement, the content of Ca (OH) 2 in the cement stone is reduced. In addition, the calcium-silicon ratio and the composition of the hydration product in the cement system are also changed to make the cement stone structure uniform and dense, Pore diameter becomes smaller, porosity decreases, the strength of cement stone increases, the permeability decreases, thereby enhancing the anti-corrosion ability of cement stone.