苏嵯输油管道混合原油凝点计算方法

对呼伦贝尔与塔木察格原油不同混合比例下进行凝点测试实验,并根据已有的混合原油凝点模型进行计算,优选了凝点计算模型。通过分析实验数据,采用曲线拟合和最小二乘法进行模型修正两种方法得出苏嵯输油管道混合原油凝点计算公式,并对修正后模型和拟合出的曲线进行验证。实验数据表明修正后的模型较曲线拟合公式对于计算混合原油凝点结果更精准,可使原油的凝点较已有模型计算值的最小平均绝对偏差减小75%,较最大平均绝对偏差减小99%,较最小标准偏差减小45.77%,较最大标准偏差减小75.26%。

The Calculation Method of Pour Point of Mixed Crude Oil of Suecuo Oil Pipeline

The pour point of mixed oil of Hulun Buir oil and Tamtsag oil under different mixing ratio was tested, and the pour point was calculated by different mixed oil pour point models, suitable calculation model of mixed oil pour point was determined. Through analysis of the experimental data, model updating by curve fitting and least square method, calculation formula of Suecuo oil pipeline mixed crude oil pour point was obtained, and the revised models and fitted curve were verified. The experimental data show that the modified model is more accurate than curve fitting formula for calculating pour point of mixed crude oil. The minimum average absolute deviation of the crude oil pour point reduces 75 percent ,the maximum average absolute deviation of the crude oil pour point reduces 99 percent, the minimum standard deviation reduces 45.77 percent, the maximum average standard deviation reduces 75.26 percent than the existing models.