起伏管道液气置换过程的压降预测

Pressure drop prediction of hilly pipeline during liquid-gas displacement

起伏管道在投产过程中极易出现气阻现象,影响管道安全。为保障新建管道的顺利投产,提出了一种新的压降预测方法:将处于液气置换过程中的管道分为积气段、气泡段及转弯段3部分,分别针对每一部分提出了相应的压降计算方法。将该预测方法应用于中国某原油管道的投产过程中,对管道沿线的压降进行预测,结果表明该方法的计算结果与现场实际数据较为吻合,可为同类管道投产时的压降预测提供理论指导。(图4,表3,参25)

The phenomenon of gas blockage,which is very easy to occur during commissioning of hilly pipeline,will affect the safety of pipeline.In order to ensure that a newly-built pipeline can be put into service successfully,a new method was proposed to predict the pressure drop.In the method,the pipeline in the process of liquid-gas displacement is divided into three sections,including the gas accumulation section,the bubble section and the turning section,and the calculation method of pressure drop is given for each section separately.In the case study,the proposed method was applied to a crude oil pipeline in China during commissioning to predict the pressure drop along the pipeline.The results show that the calculations are in good agreement with the field data,which can provide theoretical guidance for pressure drop prediction of similar pipeline during commissioning.(4 Figures,3 Tables,25 References)