三塘湖原油注入鄯-兰管线原油物性研究

Study of the Santanghu Crude Oil in Shan-Lan Crude Oil Pipeline

目前,鄯-兰管线采用加降凝剂改性输送和加热输送相结合的工艺顺序输送塔里木油、哈油、吐哈油及北疆与塔里木混油。三塘湖支线是在鄯-兰管线建成后新建的注入管线,三塘湖原油凝点较高,且降凝剂感受性不理想、稳定性未知。当采用全注入时,需要研究三塘湖原油进入鄯-兰管线后,加热或加剂输送能否安全输送至炼厂;当采用部分注入时,需要研究三塘湖原油与其他原油掺混后物性变化情况,重点研究不加剂三塘湖原油掺入加剂油后物性变化情况。研究方案分为4个时间段,侧重点各有不同,结合鄯-兰管线实际运行情况和注入后对管线的影响两个方面按由急到缓的顺序排定了测试顺序,将为工期相对紧张的相应配套工程开展设计工作提供基础条件。

The Shan-Lan crude oil pipeline is now pipelining the Tarim crude oil,the Ha crude oil,the Tuha crude oil and the blending oil of the North Xinjiang crude oil and the Tarim crude oil. The Santanghu pipeline is a new pipeline as an inlet built after the completion of the Shan-Lan pipeline. The Santanghu crude oil is at a higher freezing point but has a low efficiency of the freezing point depressant. In the case of a full-inlet,it is necessary to make a study of whether the Santanghu crude oil can be transported safely to the refinery. In the case of a side-inlet, the change of the blending of the Santanghu crude oil and other crude oils calls for research. The study of the Santanghu crude oil may be derided into four stages which are given different degrees of priority. In combination with the actual operational condition of the San-Lan pipeline and the impacts of the oil inlet on the pipeline, an orderly arrangerment of tests can provide a foundation for the design of the auxiliary projects so as to determine the basic physical propery of the Santanghu crude oil.