关键词: 水合物颗粒, 黏附力, 毛细液桥力, 聚集特性

Abstract: Microscopic force between hydrate particles and agglomeration of particles are critical for steady flow of hydrate slurry. This paper investigates common equipments used in researching microscopic force and agglomeration of particles，including focused beam reflectance measurement probe，particle video microscope probe，high pressure differential scanning calorimetry and micromechanical force apparatus. Measurement with micromechanical force apparatus and theoretical study have proved that the dominant adhesion force between hydrate particles is capillary bridge force，which is the main factor causing agglomeration of particles. Force balance model is used to study agglomeration of hydrate particles and calculate critical agglomeration size. This paper also summarizes agglomeration mechanisms of hydrate particles proposed by prior researchers with emphasis on physical model of contact induced-shear limited mechanism which is based on population balance model. This mechanism can well describe dynamics process of hydrate particles agglomeration. Further research and definition of microscopic forces between hydrate particles and agglomeration will have great significance for oil and natural gas transportation，and confirming influence of anti-agglomerant on natural gas hydrate particles agglomeration will be a focus of future research.

Key words: hydrate particle, adhesion force, capillary bridge force, agglomeration