摘要
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 a self-designed experiment system for water mixed transport of heavy oil and taking the simulated heavy oil prepared from liquid paraffin and solid paraffin products as a research object, the experiment for water mixed transport of heavy oil is carried out under low-temperature conditions in winter. Two flow patterns such as ideal aqueous suspension dispersed flow and finite plug suspension dispersed flow are observed. Based on the hypothesis of two flow patterns consistent with laminar flow theory, the relationship of apparent viscosity of oil and water mixture with flow pattern, water content and pipe diameter are analyzed using Darcy＇s law. The results show that when the water content is higher than 80% and temperature of oil and water mixture is far lower than condensation point of heavy oil, the oil and water mixture in the pipeline will appear steady ideal aqueous suspension flow pattern, when the water content is below a certain level, flow pattern of oil and water mixture shifts from the ideal aqueous suspension flow pattern to the finite plug aqueous suspension flow pattern, but plug length and spacing are relatively stable and good fluidity are also shown, and intemal diameter of the pipeline will affect formation of plugs in the water mixed transport, When the internal diameter is smaller, it will be more prone to plug. （3 Figures, 6 References）
出处
《油气储运》
CAS
2013年第1期20-22,共3页
Oil & Gas Storage and Transportation
关键词
稠油
伴水输送
含水率
流型
表观粘度
heavy oil, water mixed transportation, water content, flow pattern, apparent viscosity
