顺序输送原油管道中减阻剂效果的评价方法

发布时间：2019-04-20 19:29

【摘要】：在顺序输送管道加注减阻剂现场试验中,首末站压差取决于减阻剂的作用效果及管道中各品种原油所占管容的比例,因此不能沿用输送单品种原油管道减阻率的计算方法进行减阻剂效果评价。依据乌鄯原油管道顺序输送北疆油、哈国油的运行实例,对顺序输送过程中减阻剂作用效果提出了评价方法。当顺序输送管道首站注入的加剂油与末站排出的未加剂油为同种原油时,管道中各品种原油所占管容比例不变,管道首末站压差的降幅仅取决于减阻效果;对应注入加剂油的管长,通过理论计算得到该管段输送未加剂原油产生的摩阻;首末站压差降幅与该摩阻的比值即为减阻剂对管道输送该原油产生的减阻率。现场试验证明:添加减阻剂A,在410~600 m3/h流量范围内,对乌鄯线输送哈国油减阻率为31.4%~34.7%;添加减阻剂B,在550~933 m3/h流量范围内,减阻率为15.8%~17.2%。
[Abstract]:In the field test of the sequential pipeline, the pressure difference between the first and final stations depends on the effect of the drag reducer and the ratio of the crude oil in the pipeline to the pipe capacity. Therefore, the calculation method of drag reduction rate of single crude oil pipeline can not be used to evaluate the effect of drag reducer. According to the operation examples of North Xinjiang oil and Kazakh oil in sequence transportation of Wushan-Shanshan crude oil pipeline, the evaluation method for the effect of drag-reducing agents in the sequential transportation process is put forward. When the additive oil injected at the first station of the pipeline and the unadded oil discharged from the final station are the same crude oil, the proportion of each kind of crude oil in the pipeline is the same, and the decrease of the pressure difference between the first station and the final station of the pipeline depends only on the drag reduction effect. Corresponding to the length of the pipeline injected with the additive oil, the friction produced by transporting the crude oil without additive in the pipeline section is obtained by theoretical calculation, and the ratio of the drop in the pressure difference between the first and final station and the friction is the drag reduction rate produced by the drag reducer to the pipeline transportation of the crude oil. Field tests show that the drag reduction rate of Kazakh oil conveying to Wushan-Shanshan line is 31.4% ~ 34.7% within the flow rate of 410 ~ 600 m ~ (3) / h with the addition of drag reducing agent (A) in the range of 410 ~ 600 m ~ 3 / h; When B was added, the drag reduction rate was 15.8% / 17.2% in the flow rate range of 550 / 933 m ~ 3 路h ~ (- 1).
【作者单位】：中国石油大学(北京)/油气管道输送安全国家工程实验室/城市油气输配技术北京市重点实验室;中国石油天然气股份有限公司西部管道分公司;中国石油天然气股份有限公司天然气与管道分公司;
【基金】：国家自然科学基金项目“蜡与沥青质协同作用原油管道固相蜡沉积机理与规律研究”,51204194;“深水环境下易凝高黏原油-天然气输送系统流动保障基础问题研究”,51134006
【分类号】：TE832

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