摘要
在井下进行表面电磁波通信时,中继器布局不合理会导致信号强度减弱,为此,提出了表面电磁波的协同中继传输方法。首先,结合数值模拟与模拟试验结果,分析了表面电磁波的传播特性;然后,利用电场积分方法,建立了井下表面电磁波中继传输系统的数学模型,分析了不同中继器布局和数量对接收机信号强度的影响。研究结果表明,表面电磁波比传统无线电磁波具有更小的衰减和更高的传输速率,可成为一种高效的井下通信方式;应用表面电磁波协同中继传输技术,信号强度可平均提高5.91 dB。研究结果为增大表面电磁波井下通信的传输距离提供了新的技术途径。
When conducting downhole surface electromagnetic wave communication,an unreasonable layout of the relay will lead to the reduction of signal strength.To address this issue,a collaborative relay transmission method for surface electromagnetic wave was proposed.Firstly,the propagation characteristics of surface electromagnetic waves were analyzed by combining numerical simulations and experiments.Then,based on the electric field integral method,a mathematical model for the relay transmission system of downhole surface electromagnetic wave was established.The impact of different relay layouts and quantities on the signal strength of receivers was analyzed.The results show that surface electromagnetic wave have smaller attenuation and higher transmission rates compared to traditional wireless electromagnetic wave,which can be an efficient mode of subsurface communication.Meanwhile,the use of collaborative relay transmission technology of surface electromagnetic wave can increase signal strength by an average of 5.91 dB,providing a new approach to increase the transmission distance of downhole surface electromagnetic wave communication.
作者
王万江
李伟勤
刘昌岷
吴育涵
WANG Wanjiang;LI Weiqin;LIU Changmin;WU Yuhan(School of Electrical Engineering and Information,Southwest Petroleum University,Chengdu,Sichuan,610599,China)
出处
《石油钻探技术》
CAS
CSCD
北大核心
2024年第4期143-150,共8页
Petroleum Drilling Techniques
基金
四川省科技厅重点项目“油套管环境下井下无线低频电磁信号高速双向传输系统”(编号:2020YFG0182)资助。
关键词
井下通信
表面电磁波
协同中继
数值模拟
信号传输
subsurface communication
surface electromagnetic wave
collaborative relay
numerical simulation
signal transmission
