管道中连续振动信号衰减模型与传递特性研究  

Signal attenuation model and transfer characteristics for continuous vibration signals inside a pipeline

作　　者：刘均[1,2] 袁峰[1] 

机构地区：[1]哈尔滨工业大学电气工程及自动化学院,哈尔滨150001 [2]东北石油大学电气信息工程学院,大庆163318

出　　处：《振动与冲击》2015年第19期84-90,共7页Journal of Vibration and Shock

基　　金：国家自然科学基金(61004067)资助项目

摘　　要：借鉴电力线输电理论中的阻抗和传递系数来描述连续压力波动在管道中的传递过程,建立了基于传递矩阵的连续波衰减模型,利用特征阻抗来描述管道本体特征对波动传递的影响,并以此模型为基础,分析了连续波在管道中传递时压力和流量之间的关系、以及管道终端阻抗和倾角对波动传递的影响。通过对模型的仿真计算,得出了在管道中连续波信号传递时,管道内压力波呈驻波分布的结论,同时分析了在不同终端阻抗下波动的分布情况;通过对管道内不同频率信号的衰减情况分析,绘制了管道内信号传递的幅频特性曲线,得出了随着频率的升高,管道内信号呈波动性衰减的结论。最后通过地面验证实验,说明了不同频率信号在相同管道内的传递情况符合仿真分析,为随钻测量过程中通信频率的选取提供了理论支持。Here,impedance and transmission coefficient of the power line transmission theory were used to describe continuous pressure vibrations in transfer process of a pipeline,the continuous wave attenuation model was built based on the transfer matrix method. The characteristic impedance was adopted to describe the influence of the pipeline＇s property on the wave propagation. According to this wave attenuation model,the relationship between pressure and flow was analyzed when the continuous waves moved along the pipeline,and the influence of terminal impedance and dip angle of the pipeline on the wave transmission was studied. Through simulation of the model,it was shown that the pressure waves are the standing wave distribution when the continuous wave signals transmit in the pipeline; at the same time,the transmission volatility under different terminal impedances is analyzed; the amplitude-frequency characteristic curve of the signal transmission in the pipe is mapped by analyzing the attenuation situations of different frequency signals in the pipeline,so the signal in the pipe is in the attenuation volatility with increase in frequency. The tests on the ground showed that the situations about signals of different frequencies transmission in the same pipe agreed well with those using the simulation analysis. The results provided a theoretical support for selecting the frequency of communication in the process of measurement while drilling.

关 键 词：幅频特性 随钻测量 传递系数 水力阻抗 压力波动 

分 类 号：TE242.9[石油与天然气工程—油气井工程]