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对于高粘原油,一般采用轻油释稀、加热和掺水等方法输送。本文根据SG原油的物性,就稀释输送方案作了工艺探讨。通过试验,发现稀释油的稀释比一定时,低温时的降粘效果要比高温时好;在同一温度下,稀释比越小则降粘效果越好。关于稀释后的混合油粘度计算问题,文中指出了现有的双对数式(1)、肯达力及蒙洛埃式(2)的不足之处,即按式(1)计算的结果与实测值相差80％,式(2)的计算误差在-23％～103％之间。显然,都不适宜用在此处。经过试验研究,文章指出,当1gμ-X％成线性关系时,归纳出式(3),用该式(3)计算出的混合油粘度与实际测量较接近。文章还就输送SG原油管路的优化设计问题,介绍了用电子计算机进行优化设计和求解的方法,并用实例作了具体的说明。文章最后,还就SG原油的加热输送与稀释输送作了比较,说明了稀释输送工艺是经济合理、安全、灵活的。
For high viscosity crude oil, light oil is generally used to release dilute, heat and water and other methods of delivery. This article according to the physical properties of SG crude oil, on the dilution of the program made a process of transportation. Through the experiment, it is found that when the dilution ratio of diluent oil is constant, the viscosity-reducing effect at low temperature is better than that at high temperature; at the same temperature, the smaller the dilution ratio, the better the viscosity-reducing effect. Concerning the calculation of the viscosity of the diluted mixed oil, the disadvantages of the existing double logarithmic equation (1), the Kendall force and the Montloe equation (2) are pointed out. That is to say, 80% difference in value, the formula (2) calculation error between -23% ~ 103%. Obviously, not suitable for use here. After the experimental study, the article points out that when 1gμ-X% becomes a linear relationship, the formula (3) is deduced, and the viscosity of the mixed oil calculated by the formula (3) is closer to the actual measurement. The paper also introduced the optimization design of SG crude oil pipeline and introduced the method of optimal design and solution by electronic computer. The examples were given concretely. At the end of the article, the author also compares the heating delivery and the dilution delivery of SG crude oil, which shows that the diluted delivery process is economically reasonable, safe and flexible.