摘要
在天然气井站,采出的天然气常含有水分,在遇到弯头、管道直管段会存在明显的积液现象,对安全生产造成严重影响。针对某单井站场主管线,基于实际工况条件,采用CFD方法分析管线内液膜生成与管道内液相分布规律。模拟结果表明,含液率及分布情况与管道结构关系较大,在弯管内由二次流引发的涡核使液体更易向管道外侧流动,而在重力作用下,直管段液体均沉积在底部。运用Pearson函数将现场壁厚检测数据和模拟得到的管道截面液膜厚度分布进行相关性对比验证,结果表明弯头的相关度达到83%以上,符合度较高。该研究为合理选择腐蚀检测点提供了依据,且能大大降低现场检测工作量及检测成本。
In the natural gas well stations,the natural gas produced often contains water,and there may be significant liquid accumulation in elbows and straight pipe sections,which seriously affects safety in production.Based on the actual operating conditions of the main pipeline of a single well station,the CFD method is used to analyze the formation of liquid film in the pipeline and the distribution of liquid phase in the pipeline.The simulation results show that the liquid content and distribution are closely related to the pipe structure.The vortex core caused by secondary flow in the elbow makes it easier for the liquid to flow towards the outside of the pipe,while under the action of gravity,the liquid in the straight section is deposited at the bottom.The Pearson function is used to compare and verify the correlation between the on-site wall thickness measurement data and the simulated liquid film thickness distribution across the pipe section.The results show that the correlation degree of the elbow can reach above 83%,with a high degree of compliance.This provides a basis for the reasonable selection of corrosion detection points,and can greatly reduce on-site detection workload and detection costs.
作者
王明军
刘恩斌
WANG Mingjun;LIU Enbin(SINOPEC North China Oil and Gas Branch,Zhengzhou 450006,Henan,China;School of Petroleum and Natural Gas Engineering,Southwest Petroleum University,Chengdu 610500,Sichuan,China)
出处
《能源化工》
CAS
2023年第1期57-63,共7页
Energy Chemical Industry
基金
四川省科技厅应用基础研究项目(2019YJ0352)。
关键词
含液率
腐蚀量
CFD方法
二次流
liquid content
corrosion
CFD method
secondary flow
