油管泄漏的声场特性计算与分析  

Calculation and Analysis of Acoustic Field Characteristics of Gas Well Tubing Leakage

作　　者：孙鹏 李景翠 万继方 何青[1] SUN Peng;LI Jingcui;WAN Jifang;HE Qing(School of Energy Power&Mechanical Engineering,North China Electric Power University,Beijing 102206,China;CNPC Engineering Technology R&-DCo.,Ltd.,Beijing 102206,China)

机构地区：[1]华北电力大学能源动力与机械工程学院,北京102206 [2]中国石油集团工程技术研究院有限公司,北京102206

出　　处：《电力与能源》2021年第2期210-214,共5页Power & Energy

摘　　要：超声检测是目前采气井管道泄漏检测中比较常用的一种方法。为了提高泄漏检测的准确性,以天然气井油套管为研究对象,建立了管道泄漏的仿真模型,对油管泄漏时的声源特性及声场分布进行了仿真计算,并探究了油管内外压差对声源及声场的影响。结果表明:油管泄漏时的气体流速较大,泄漏声源以四极子声源为主;声源域的声压级在20~60 kHz范围内存在峰值,整体上随频率的增大震荡减小;管内外压差只影响声源的强度,而对声源的特性基本无影响;沿管道轴向,越接近泄漏孔正下方,声压级的峰值越大;沿管道径向,越接近于泄漏孔,声压级的峰值越大。Ultrasonic testing is a common method for pipeline leakage detection of gas production well.For the purpose of improving the accuracy of leakage detection,the natural gas well tubing and casing was taken as the research object.The simulation model of pipeline leakage was established,the sound source characteristics and sound field distribution of tubing leakage were simulated and calculated,and the influence of pressure difference of tubing and casing on sound source and sound field was explored.As the results show,the gas flow velocity is large,and the leakage sound source is mainly quadrupole;the sound pressure level in the sound source domain has a peak value in the range of 20 kHz-60 kHz,and the overall vibration decreases with the increase of frequency;the pressure difference inside and outside the pipe only affects the intensity of the sound source,but has no effect on the characteristics of the sound source.Along the pipeline axis,the closer to the bottom of the leakage hole,the greater the peak value of the sound pressure level;along the radial direction of the pipe,the closer to the leakage hole,the greater the peak value of sound pressure level.

关 键 词：天然气井油管 管道泄漏 气动噪声 声场仿真计算 

分 类 号：TE973[石油与天然气工程—石油机械设备]