油田原油储运系统能耗分析与节能措施

Energy consumption analysis and energy conservation technology of crude oil storage and transportation system in oilfield

为降低某油田原油储运系统的能耗,采用现场调查与分析设备资料的方法,掌握原油储运系统各站点的运输距离、年输油量和综合能耗等信息。通过分析管道运行节能潜力和原油站库节能潜力,采取以电力代替原油方式,合理设置管线最低进站温度和离心泵减级等节能措施。现场运行表明:推行“以电代油”工程后,C站库的能耗经济成本可以降低50%以上;安装变频器可降低电动机的运行损耗,相比于改造前系统运行能耗降低了12.7%;采取离心泵减级措施后,对于工作压力在1.5 MPa以下、流量为100~120 m^(3)/h的离心泵,其运行功率可以降低1.6~4.6 kW,在多输油20 m^(3)/h的情况下,单位能耗下降了0.0918 kWh,节能效果较为明显。

In order to reduce the energy consumption of the crude oil storage and transportation system in an oilfield,the method of on-site investigation and analysis of equipment data has been used to master the information on the transportation distance,annual oil amounts and comprehensive energy consumption of each stations of crude oil storage and transportation system.The energy conservation potential of pipeline operation and the energy conservation potential of crude oil stations and depots are analyzed.By adopting energy conservation measures such as substituting electricity for crude oil,the minimum inlet temperature of pipelines and reducing the stage of centrifugal pumps are set up.The field operation shows that after implementing the"electricity instead of oil"project,the economic cost of energy consumption for Station C can be reduced by more than 50%.The operating losses of motor is reduced by installing inverters.Compared with the system before transformation,the operating energy consumption is reduced by 12.7%.After adopting the centrifugal pump stage reduction measures,the operating power of centrifugal pumps with working pressure below 1.5 MPa and flow rate of 100~120 m^(3)/h can be reduced by 1.6~4.6 kW.With an additional 20 m^(3)/h of oil delivery,the unit energy consumption is reduced by 0.0918 kWh,which makes the energy conservation effect more obvious.