漠大线输量下降原因及应对措施

发布时间：2018-11-01 13:45

【摘要】：在管道全线配泵方案不变的情况下,漠大原油管道输量异常下降,由2 300 m~3/h逐渐降低至2 100 m~3/h,管道运行效率降低,影响输油任务。通过计算各管段单位摩阻损失,发现摩阻异常增大出现在漠河站与加格达奇泵站之间,对比分析了油品物性、管道沿线油温、地温数据、减阻剂添加效果和站场工艺变更等影响因素,经过现场调研,确定原因为:1为塔河站新投用的轴流式单向阀对减阻剂产生剪切导致减阻剂失效;2该管段存在结蜡。通过采取切换塔河站流程和站间清管两方面措施,管道输量恢复正常状态,降低了漠河首站库存增加的风险。基于上述,针对管道冬季定期清管,以及俄油冬季动火施工引起结蜡和增输改造的相关研究提出了建议。
[Abstract]:Under the condition that the pump distribution scheme for the whole pipeline is not changed, the volume of crude oil transportation in Muda crude oil pipeline drops abnormally, from 2 300 mv / 3 / h to 2 100 mm3 / h, and the efficiency of pipeline operation is reduced and the oil transportation task is affected. By calculating the unit friction loss of each pipe section, it is found that the abnormal increase of frictional resistance occurs between Mohe station and Gagdaci pumping station. The oil physical properties, oil temperature along the pipeline and ground temperature data are compared and analyzed. The influence factors such as the effect of drag-reducing agent and the technical change of station yard are determined by field investigation. The reasons are as follows: (1) the failure of drag-reducing agent is caused by shearing of drag-reducing agent by axial flow one-way valve newly put into use in Tahe station; 2 Wax deposit exists in this section. By adopting the measures of switching the flow of the Tahe station and clearing the pipe between the stations, the pipeline volume is restored to normal state, and the risk of increasing the inventory in the first station of Mohe River is reduced. Based on the above, the paper puts forward some suggestions for the research of pipeline regular cleaning in winter, and the wax deposit and the increase of transportation during the construction of Rosneft in winter.
【作者单位】：中国石油北京油气调控中心;
【分类号】：TE832

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