输油管道蜡沉积规律及经济运行方案研究
发布时间：2018-09-08 20:00
【摘要】：目前,含蜡原油在我国开采的原油总量中占有很大的比重,在油品输送过程中,沿管线方向,温度逐渐降低,会产生一定的蜡沉积,结蜡层减小了管道运输流通面积,导致输量减小,流动阻力增大,并最终影响管道的正常运行。随着油田开采的逐渐深入,油田产量逐渐下降,集油管道的输量要做出相应调整。为保证管道安全、经济的运行,有必要探究管道结蜡规律。本文基于理论分析、实验研究及计算机编程方法对输油管道蜡沉积规律及管道经济运行进行了研究。首先通过室内实验确定油样的基本物性,在蜡沉积实验数据的基础上分析蜡沉积速率的影响因素。此外,运用回归分析法及灰色预测理论分别建立蜡沉积模型,进行分析对比,优选预测模型,以提高预测的准确性。并通过蜡沉积模型预测实际运行管道的不同运行条件下的结蜡情况,结合灰色预测模型,分析油温、输量对管线结蜡规律的影响。对实际管道进行蜡沉积预测可求得结蜡严重区域。最后,结合蜡沉积预测模型,分析不同输送介质下的蜡沉积厚度计算方法,考虑流型的转变,给出热油管道运行过程中的热力、水力计算方法。建立以输油成本为目标函数、以结蜡层厚度为决策变量的数学模型。应用VB语言编程并计算含蜡原油管道的运行成本,确定经济清管周期,分析结蜡层在管道运行过程对能耗的影响,为管道节能降耗和安全运行提供理论基础。
[Abstract]:At present, waxy crude oil accounts for a large proportion of the total crude oil produced in China. In the course of oil product transportation, along the pipeline direction, the temperature will gradually decrease, which will produce a certain amount of wax deposition, and the wax deposit layer will reduce the pipeline transportation circulation area. As a result, the flow resistance is increased and the normal operation of the pipeline is affected. With the deepening of oilfield production, the oil production is gradually decreasing, and the oil gathering pipeline should be adjusted accordingly. In order to ensure the safe and economical operation of pipeline, it is necessary to explore the law of pipeline wax deposit. Based on theoretical analysis, experimental research and computer programming, the wax deposition law and economic operation of oil pipeline are studied in this paper. Firstly, the basic physical properties of oil samples were determined through laboratory experiments, and the influencing factors of wax deposition rate were analyzed on the basis of wax deposition experimental data. In addition, the model of wax deposit was established by regression analysis and grey prediction theory, and the prediction model was optimized to improve the accuracy of prediction. The wax deposition model is used to predict the wax deposit in different operating conditions of the pipeline and the influence of oil temperature and transportation volume on the wax deposit law of pipeline is analyzed by combining the grey prediction model. The serious area of wax deposit can be obtained by prediction of wax deposition in actual pipeline. Finally, based on the prediction model of wax deposition, the calculation method of wax deposition thickness in different transport media is analyzed, and the thermal and hydraulic calculation methods during the operation of hot oil pipeline are given, considering the change of flow pattern. A mathematical model with the cost of oil transportation as the objective function and the thickness of the wax deposit as the decision variable is established. The operation cost of waxy crude oil pipeline is programmed and calculated by VB language, the economical cleaning period is determined, and the influence of waxing layer on energy consumption during pipeline operation is analyzed, which provides a theoretical basis for energy saving and safe operation of pipeline.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE832
本文编号：2231544
[Abstract]:At present, waxy crude oil accounts for a large proportion of the total crude oil produced in China. In the course of oil product transportation, along the pipeline direction, the temperature will gradually decrease, which will produce a certain amount of wax deposition, and the wax deposit layer will reduce the pipeline transportation circulation area. As a result, the flow resistance is increased and the normal operation of the pipeline is affected. With the deepening of oilfield production, the oil production is gradually decreasing, and the oil gathering pipeline should be adjusted accordingly. In order to ensure the safe and economical operation of pipeline, it is necessary to explore the law of pipeline wax deposit. Based on theoretical analysis, experimental research and computer programming, the wax deposition law and economic operation of oil pipeline are studied in this paper. Firstly, the basic physical properties of oil samples were determined through laboratory experiments, and the influencing factors of wax deposition rate were analyzed on the basis of wax deposition experimental data. In addition, the model of wax deposit was established by regression analysis and grey prediction theory, and the prediction model was optimized to improve the accuracy of prediction. The wax deposition model is used to predict the wax deposit in different operating conditions of the pipeline and the influence of oil temperature and transportation volume on the wax deposit law of pipeline is analyzed by combining the grey prediction model. The serious area of wax deposit can be obtained by prediction of wax deposition in actual pipeline. Finally, based on the prediction model of wax deposition, the calculation method of wax deposition thickness in different transport media is analyzed, and the thermal and hydraulic calculation methods during the operation of hot oil pipeline are given, considering the change of flow pattern. A mathematical model with the cost of oil transportation as the objective function and the thickness of the wax deposit as the decision variable is established. The operation cost of waxy crude oil pipeline is programmed and calculated by VB language, the economical cleaning period is determined, and the influence of waxing layer on energy consumption during pipeline operation is analyzed, which provides a theoretical basis for energy saving and safe operation of pipeline.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE832
【参考文献】
相关期刊论文 前1条
1 王志华;;高凝原油管道输送蜡沉积规律实验研究[J];特种油气藏;2006年05期
，本文编号：2231544
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