乳化含蜡原油沉积层含水研究进展

乳化含蜡原油沉积层含水是油水两相管流蜡沉积研究领域的新热点。近年来,国内外学者基于冷指、环道沉积实验等手段,分析了乳化原油蜡沉积层含水的影响因素,明确了油相体积含水率、分散水滴粒径等因素的影响。综述了乳化原油沉积层含水的影响因素及相关机理,讨论了含水对沉积层含蜡量、流变性的影响,列举了当前主流的乳化油水体系蜡沉积预测模型及方法,并展望了今后含水乳化原油沉积机理的研究方向,以期为深海含蜡原油混输管道的设计、运行及管理提供理论依据。

Research progress on the water entrainment in the deposition layer of emulsified waxy crude oil

The water entrainment in the deposition layer of emulsified waxy crude oil is a new hot spot in the research field of wax deposition of oil-water two-phase flow in transportation pipelines.In recent years,domestic and foreign scholars analyzed the factors influencing the water entrainment in the wax deposition layer of emulsified water-bearing crude oil by means of cold finger and loop deposition experiment,and accordingly clarified the influences of the volumetric water content of oil phase,the size of dispersed water drop and other factors.In this paper,the influencing factors and related mechanisms of water entrainment in the deposition layer of emulsified water-bearing crude oil were reviewed,and the effects of water entrainment on the wax content and rheological behavior of the deposition layer were discussed.Then,the current dominant models and methods for predicting the wax deposit in emulsified oil-water systems were listed.Finally,the future research direction on the deposition mechanisms of emulsified water-bearing crude oil was prospected,so as to provide the theoretical basis for the design,operation and management of deepsea mixed transportation pipelines of waxy crude oil.