MODIFIED ASPHALT PARTICLES AND PREPARATION METHOD AND USE THEREOF

摘要

Disclosed are a modified asphalt particle and a preparation method and application thereof, characterized in that the modified asphalt particle comprises asphalt and a modifier. The modifier comprises poly-sulfur and free sulfur. The sulfur element accounts for 10-40 weight percent of the total amount of the modified asphalt particle, and the poly-sulfur accounts for 30-70 weight percent of the total amount of the sulfur element. The total particle size of the modified asphalt particle is smaller than or equal to 150 µm. The modified asphalt particle provided in the present invention is excellent in high temperature performance, and can be used for preparing drilling fluid. Water-in-oil based drilling fluid obtained from the modified asphalt particle provided in the present invention has low plastic viscosity, high dynamic shear force, high dynamic plastic ratio, and high emulsion-breaking voltage, and improves the high temperature resistance and cutting carrying capability of a system. Particularly, a high emulsion-breaking voltage is still maintained in water-in-oil based drilling fluid having high water content, thereby ensuring the electric stability of the system.