油温回升对含蜡原油添加纳米降凝剂改性影响

研究并分析了高含蜡原油经纳米降凝剂改性后油温回升对低温流变影响,并对改性后原油静态时效稳定性进行了室内实验研究。实验结果表明,高含蜡原油纳米降凝剂具有良好的降凝降粘效果,加剂后经65℃处理后,凝点降至17.5℃;油温回升后原油低温流动改善效果随回升温度的降低则更好,油温回升至35℃后,降温至30℃测试,凝点为24℃,改性后原油重复加热5次后凝点无变化,稳定性良好,为安全经济地管输高含蜡原油提供了技术支持。     

埋地原油管道启动特性的大型环道试验研究

借助大型埋地试验环道,对初始启动压力波在管道中的传递进行了测量和研究。基于正交试验的原理,分析了停输温度、启输温度、启输流量对波速传递的影响规律以及影响重要程度,依此提出温度影响系数的概念,量化表征低温原油的收缩性和结构性,建立经验公式来估算初始启动压力波速大小,对比环道两管径的试验数据,经验公式吻合程度较好。     

成品油管网批次计划编制系统

随着成品油管网的形成和发展,仅能实现网内管道调度计划的制定与管理,已经不能很好地满足集中调控的需求。开发以中转库区运行均衡为主要判定条件的成品油管网批次计划编制系统,可实现网内管道和库区调度计划的统筹制定。文中介绍了该系统的架构设计及管网调度计划编制基本流程。     

Experimental research on characteristic of start-up pressure wave propagation in gelled crude oil by large-scale flow loop

In order to research start-up pressure wave propagation mechanism and determine pressure wave speed in gelled crude oil pipelines accurately,experiment of Large-scale flow loop was carried out.In the experiment,start-up pressure wave speeds under various operation conditions were measured,and effects of correlative factors on pressure wave were analyzed.The experimental and theoretical analysis shows that thermal shrinkage and structural properties of gelled crude oils are key factors influencing on start-up pressure wave propagation.The quantitative analysis for these effects can be done by using volume expansion coefficient and structural property parameter of gelled crude oil.A new calculation model of pressure wave speed was developed on the basis of Large-scale flow loop experiment and theoretical analysis.