热油管道清蜡周期的抛物线计算模型

在热油管道输送过程中,结蜡现象严重影响原油输送的经济性与安全性,合理制定热油管道清蜡周期是确保管道正常运行的关键。通过分析不同含蜡量、含胶量、含水率的原油结蜡强度随温度变化的规律,拟合出温度与结蜡强度抛物线的关系式,结合析蜡温度建立了热油管道结蜡强度通用抛物线数学模型和清蜡周期计算公式,可实现对不同含蜡量、含胶量、含水率、析蜡温度下热油管道清蜡周期的量化计算,进而为原油特性相近的热油管道制定合理的清蜡周期,确保输油管道正常运行。该方法在西吐孜科尔油田—库木克尔油田的热油管道进行了实例应用,合理调整了管道清管周期,管道运行安全可靠,为热油管道清蜡周期的确定提供了技术支持。(图3,表1,参22)

Parabolic calculation model for wax removal interval of hot oil pipeline

In the process of hot oil pipeline transportation,the economy and safety of crude oil transportation are seriously affected by wax deposition.Therefore,the reasonable wax removal interval is considered as the key to ensure the normal operation of the pipeline.By analyzing the law of wax deposition intensity of oil with different wax content,resin content and water content changing with temperature,the parabolic relation between temperature and wax deposition intensity was obtained by fitting.The general parabolic mathematical model of wax deposition intensity for hot oil pipeline was established by considering wax precipitation temperature.The wax removal interval was proposed which could quantitatively calculate the wax removal interval of hot oil pipelines at different wax content,resin content,water content and wax precipitation temperature,make reasonable wax removal interval for hot oil pipelines with similar properties and ensure the safe operation of pipelines.This method has been applied to the hot oil pipeline from West-Tuzkol Oilfield to Kumkol Oilfield.Thanks to the reasonable wax removal interval,the pipeline operates safely.This method is expected to provide technical supports for determining the wax removal interval of hot oil pipelines.(3 Figures,1 Table,22 References)