某气田集输配气管网仿真分析

EMULATION ANALYSIS OF PIPELINE NETWORK OF A CERTAIN GAS FIELD

针对国内的某些老气田已经进入开发后期,产气规模小,产量田已满足不了市场的需求的实际,提出以管网仿真分析,实施地面管网规划和改造,进行邻区天然气的开发和利用。建立了包括管道和非管元件的复杂管网的数学模型,对稳态仿真采用节点压力法建立非线性方程,对瞬态仿真采用隐式法建立非线性差分方程,并应用广义阻尼牛顿—拉夫逊法求解非线性方程组,最后研制出管道仿真系统PipelineEmulationSystem(PES)仿真软件包,对某片区的目前管网和规划管网进行仿真分析。结果表明:规划后管网中的管道压力没有超过允许压力,大部分管道可以增加流量,个别管道应该改换成较大管径的管道。

Some old natural gas fields have been in production tail, there are only a small scale gas production, the gas productivity can not meet the consumer′s demand. So it is put forward to conduct pipeline network emulation analysis and ground pipeline planning and restructure, and for natural gas companies to get supplementary gas form other gas fields through main pipeline or to develop new gas field, integrated mathematical model of complex pipeline network including pipe and nonpipe elements is established, and generalized damping Newton-Raphson arithmetic is adopted to solve nonlinear equations, finally,PES software package is researched and developed. The PES is uesd to simulate and analyze the current pipeline network and future planed pipeline network. The result shows: the pressure in the planned pipeline network does not exceed permitted pressure, most of the pipeline could increase natural gas flow and specific pipeline should be changed to bigger diameter pipeline.