海底无保温油气混输管道压降计算

摘要

将海底输水管道临时改为油气混输无保温管道,由于油气水物理性质的差别,应根据管内流体气、液2相的粘度、密度、界面张力等重新建立压降模型.根据胜利油田20B,20A、251B、CB502平台海底管道的数据及多相流管路压降理论,采用对比分析、数学模拟等方法,建立了贝格斯-布里尔压降模型及海底无保温油气混输管道压降数学模型.分析了包括介质起始温度、气相液相流量、管道内径、倾料角度多种因素对海底管道压降的影响,为海底管道的设计提供了参考依据.%This submarine pipeline was used to transport water originally, however, it is an oil-gas mixed transportation pipeline without heat preservation now. Because of differences between physical properties of oil-gas and water, we should take the gas and liquid viscosity, density and interfacial tension and other factors into account to establish a new submarine pipeline pressure drop model. In this paper, according to the field logo provided by the 20B platform,20A platform,251B platform,CB502 platform of submarine pipeline,we apply the methods of comparative analysis and mathematical simulation to establish Beggs-Brill submarine pipeline pressure drop model and the temporary oil-free thermal insulation of the pressure drop and mathematical model,we also make the analysis of a variety of factors impacting on the pipeline pressure drop,including the starting temperature of media, gas liquid flow rates, pipe diameter, angle of inclination, Provide a reference basis to design submarine pipeline.