In order to improve the durability of the cement sheath, The silane coupling agent KH-560 was used to coating on the surface of oil well cement particles, and a self-repairing well cementation cement slurry system was formulated by adding 10% oil well cement particles coated with the silane coupling agent to the cement slurry. Through the analysis of wettability and hydrate exothermal tests,the surface properties of oil well cement particles coated with the silane coupling agent KH-560 were studied;through ...