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在充分考虑油包水体系水合物生成特点的基础上,基于传热学、多相流、水合物动力学相关理论,建立了描述含水合物油包水体系流动规律的理论模型,并给出了模型的定解条件和求解方法。数值计算表明:产液量、含水率、液滴粒径均会影响水合物的生成,进而影响体系流动;当水合物的生成速率受体系提供的游离气量控制时,其值基本不变;进入水合物生成域,液滴转化为水合物颗粒并发生聚并,其量纲为一的聚并粒径在整个生成域保持恒定,且产液量越少、含水率越低、液滴粒径越小,量纲为一的聚并粒径越大;进入水合物分解区,水合物颗粒簇解体后又重新聚并,量纲为一的聚并粒径较生成域的小;水合物生成会导致体系的黏度增加,黏度增幅随水合物颗粒体积分数和量纲为一的聚并粒径的增大而增大。
Based on the characteristics of the hydrate formation in the water-in-oil system, a theoretical model describing the flow rule of the hydrate-in-water system was established based on the theory of heat transfer, multiphase flow and hydrate kinetics. Define the solution conditions and solution method of the model. The numerical calculation shows that the production rate, water content and droplet size all affect the formation of hydrate, which will affect the flow of the system. When the formation rate of hydrate is controlled by the amount of free gas provided by the system, Hydrate-forming domains, the droplets are converted to hydrate particles and agglomerate, and the size of one of the aggregates and the particle size of the same throughout the generating domain remains constant, and the less liquid production, the lower the water content, the droplet size The smaller the size of one is, the larger the size of aggregates is, the larger the size is and the larger the particle size is. When the hydrate is disintegrated into the hydrate decomposition zone, The viscosity of the system will increase, and the increase of viscosity will increase with the increase of the volume fraction of hydrate particles and the coalescence particle size of one dimension.