提高东北原油管网经济效益的思考

The Ways and Measures to Improve the Economic Benefit for Northeast China Oil Pipeline Networks

根据东北输油管道的运行现状,对大庆原油的流变性、凝点以及降低进站油温的可行性等问题进行了分析。指出采用现行标准测试的凝点与实际管道中原油的凝点有一定差别,应客观评价凝点在运行管理中的作用;热油管道的允许最低进站油温,应根据管输原油的流变性、管道要求的允许停输时间、管道运行时沿线的热力分布、管道承压能力和输油站设备配置等因素来确定。停输再启动的计算表明,大庆原油最低进站油温由33℃降至32℃在技术上是可行的,但对嫩江穿越等特殊管段要慎重考虑。建议对东北管道的技术状况进行系统研究,包括原油流变性、热力状况、水力状况、管道及设备情况和自然条件等,根据研究结果对现行运行规程进行必要的修订。

Based on the operation status quo of Northeast China oil pipelines,the rheology, condensation point of Daqing crude oil,and the feasibility to lower the incoming temperature have been analyzed. It is pointed out that the minimum allowable incoming temperature can be determined according to the rheology of crude oil,the required shutdown time of pipeline,the thermal distribution along the in-line pipeline,as well as the load-bearing capacity of pipeline,and the equipment's allocation in puming station. The computations on shutdown and restart of the pipeline show that it is feasible in technology to cut down the minimum incoming temperature from 33 ℃ to 32 ℃. The authors suggest that the technical and economic evaluation on crude oil's rheology, thermal/hydraulic distribution along the whole pipeline networks, pipelines and equipments, and natural conditions be made. And on the base of this,the necessary revision on current operational regulations should be done in order to raise economic benefit for Northeast China oil pipeline networks.