基于PE5参数的输气管道积液治理技术探究

Research on the Treatment Technology of Liquid Accumulation in Transportation Pipeline of Gas Based on PE5 Parameters

在天然气管道运输过程中,受地势低洼处管道积液的影响,管道输送效率低,且影响输送安全。基于PE5参数分析对管道积液趋势,能够有效实现管道的安全运行。文章以陕西省某区块的2#集气站干线1为例,建立了管网的三维模型。在此基础上,模拟出管段中积液的分布及动态情况,论证了起伏地形下管线中积液的分布情况及积液治理的可行性。针对低海拔处管段中积液的分布情况,文章提出了三种积液治理的方案,分别是降低管网的出口压力、提高瞬时产量以及井口预先分离气液,并基于PE5参数分析了三种方案的可行性。结果显示,仅降低管网的出口压力无法解决管网的积液问题;通过提高生产井的瞬时产量到一定值,以及对部分井预先进行气液分离的操作,都可以有效地解决管网中的积液问题。因此,文章为管道运输天然气中的积液问题提供了有益的分析和解决方案,对确保管道输送安全具有重要意义。

During natural gas pipeline transportation,the eff iciency of pipeline transportation is low due to the accumulation of liquid in low-lying areas,which also affects transportation safety.Based on PE5 parameter analysis,the trend of pipeline accumulation can effectively achieve safe operation of the pipeline.This paper takes the trunk line 1 of the 2#gas gathering station in a certain block in Shaanxi province as an example to establish a three-dimensional model of the pipeline network.On this basis,the distribution and dynamic situation of liquid accumulation in the pipeline section were simulated,and the distribution of liquid accumulation in the pipeline under undulating terrain and the feasibility of liquid accumulation treatment were demonstrated.In response to the distribution of liquid accumulation in pipeline sections at low altitudes,this article proposes three solutions for liquid accumulation control,namely:reducing the outlet pressure of the pipeline network,increasing instantaneous production,and pre separating gas and liquid at the wellhead.The feasibility of these three solutions is analyzed based on the PE5 parameter.The results show that reducing the outlet pressure of the pipeline network alone cannot solve the problem of liquid accumulation in the pipeline network;by increasing the instantaneous production of production wells to a certain value or performing gas-liquid separation operations on some wells in advance,the problem of liquid accumulation in the pipeline network can be effectively solved.Therefore,this paper provides useful analysis and solutions for the problem of liquid accumulation in natural gas pipeline transportation,which is of great signif icance for ensuring the safety of pipeline transportation.