纳米二氧化硅对固井水泥浆性能的影响

Effect of Nano-silica on the Properties of Cement Slurry

纳米二氧化硅是一种新型高性能材料,能够有效改善水泥基材料的力学性能和微观结构。为了研究纳米二氧化硅对固井水泥浆性能的影响,通过加入不同比例的纳米二氧化硅,评价水泥浆的流变性、稳定性、稠化时间、失水量、抗压强度、抗折强度及抗冲击强度。实验结果表明,加入适量的纳米二氧化硅会使水泥浆体系增稠,沉降稳定性更好,失水性能得到明显改善,稠化时间缩短。纳米二氧化硅可以有效改善水泥浆体系的抗压强度、抗折强度及抗冲击强度,尤其提高了水泥浆体系的早期强度。研究结果为纳米二氧化硅在固井水泥浆中的应用提供参考。

Nano-silica is a new type of high performance material,which can effectively improve the mechanical properties and microstructure of cement-based materials.In order to study the influence of nano-silica on the performance of cement slurry,the rheology,stability,thickening time,water loss,compressive strength,flexural strength and resistance of cement slurry were evaluated by adding different proportion of nano-silica.The impact strength test results show that adding appropriate amount of nano-silica can thicken the cement slurry system,improve the settlement stability,improve the water loss performance and shorten the thickening time.Nano-silica can effectively improve the compressive strength,flexural strength and impact strength of cement slurry system,especially the early strength of cement slurry system.The research results provide a reference for the application of nano-silica in cementing slurry.