关键词: 水泥浆, 固井质量, 应用机理, 实验研究

Abstract: After cement slurry is treated in magnetization,surface properties of cement particulates and electromotive propertied of colloid are changed and its netted texture is broken.As a result,cement slurry reduces its viscosity and shear force and has larger flowability,which is beneficial to improving displacement efficiency.Moreover,magnetic treatment accelerates hydration reaction speed of cement slurry and increases hydration products,so crystallization and precipitation are being perfected,cement stone is getting compacted.Because of permeability reduction and intensity increase,cement stone will plug and consolidate oil,gas and water layers better.In this paper,it is presented that the application mechanism on magnetization treatment of cement slurry through a seires of laboratory microexperiments.Magnetization treatment effect is expounded and proved.Through laboratory and oil field application,it is proved that cement slurry with magnetization treatment is a new technology of raising cement quality which possesses advantages of simple cementing practice,it invest a little with a high benefit.

Key words: cement slurry, cement quality, application mechanism, experimental study