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析蜡点是表征原油析蜡过程的重要参数,基于其传统的显微观察测试方法,引入蜡晶显微图像定量分析结果,以原油在温降过程中蜡晶颗粒个数增长的首个阶跃点温度判断析蜡点,从而减少人为视觉误差以及玻片上的微尘和缺陷等对析蜡点测试结果的影响。6种含蜡原油的测试结果表明,该方法具有良好的重复性,平行实验获得的析蜡点差值均在2℃以内,与差示扫描量热(DSC)法测得的析蜡点相比,上述析蜡点数值高1～4℃,6种原油析蜡点平均高2.1℃。
Analysis of wax spots is an important parameter to characterize the process of wax precipitation. Based on its traditional microscopic observation and test method, the quantitative analysis results of wax crystal microscopic images are introduced to the first order of increase of wax crystal grains during the temperature drop of crude oil Hop temperature to determine wax points, thereby reducing the human visual error and dust on the slide and defects on the wax test results. The test results of six kinds of waxy crude oil show that the method has good repeatability. The difference of wax fraction obtained in parallel experiment is within 2 ℃, which is in good agreement with that of the wax fraction phase measured by differential scanning calorimetry Than the value of the above wax points 1 ~ 4 ℃, 6 kinds of crude oil waxing average 2.1 ℃.