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使用自行设计的稠油伴水输送实验系统,以液体石蜡和固体石蜡产品配制的模拟稠油为研究对象,开展了冬季低温条件下的稠油伴水输送实验,观察到理想水悬浮分散流和有限段塞水悬浮分散流两种流型。基于两种流型均符合层流理论的假设,采用达西定律,分析了油水混合液表观粘度与流型、含水率、管径的关系,结果表明,当含水率高于80%且管内油水混合液温度远低于稠油凝点时,管内油水混合液呈现稳定的理想水悬浮流型;当含水率低于一定水平时,管内油水混合液的流型由理想水悬浮流型转变为有限段塞水悬浮流型,但段塞长度和间距相对稳定,同样呈现出良好的流动性;管道内径会影响伴水输油时段塞的形成,管道内径越小越易出现段塞。
Using the experiment system of heavy oil with water transfer designed by ourselves, the simulated heavy oil formulated with liquid paraffin and solid paraffin was taken as the research object. The experiment was carried out to transport heavy oil with water under low temperature in winter. The ideal water suspension dispersion flow and A finite segment of plug suspension water flow two flow patterns. Based on the assumption that both flow patterns are in accordance with the laminar flow theory, Darcy’s law was used to analyze the relationship between the apparent viscosity of oil-water mixture and flow pattern, moisture content and diameter. The results showed that when the moisture content is higher than 80% When the temperature of oil-water mixture is much lower than the freezing point of heavy oil, the oil-water mixture in the tube shows a stable ideal water-suspended flow pattern. When the water content is below a certain level, the flow pattern of oil-water mixture changes from ideal water- However, the length and spacing of slug are relatively stable, and the sluice has the same fluidity. The inner diameter of the pipe will affect the slug formation during the period of water and oil delivery. The smaller the pipe diameter, the more prone to slug.