基于FPGA的井筒无线电磁短传系统设计  

Design of Wireless Electromagnetic Short Transmission System for Wellbore Based on FPGA

作　　者：刘敏丹 邵伟 LIU Mindan;SHAO Wei(School of Electronic Engineering,Xi′an Shiyou University,Xi′an 710065,China)

机构地区：[1]西安石油大学电子工程学院,陕西西安710065

出　　处：《仪表技术》2025年第1期8-11,共4页Instrumentation Technology

摘　　要：随着油气田勘探开发的持续深化,油气井钻井的质量要求日益提升。针对如何高效、准确地将近钻头处数据跨越螺杆钻具传输至随钻测量系统这一关键问题,提出了一种基于现场可编程门阵列(FPGA)的井筒无线电磁短传系统设计方案。采用XC6SLX16型FPGA芯片,以降低电路设计难度和提高电路设计统一性;基于井筒无线电磁传输原理和二进制频移键控技术,实现信号的调制解调;通过引入快速傅里叶变换(FFT)算法,加快获取信号的频谱信息并完成信号的解调。利用Modelsim仿真工具进行验证,结果表明,FFT算法不仅实现了目标信号和其他信号的快速区分,还显著提升了信号传输的准确性和可靠性。With the continuous deepening of oil and gas field exploration and development,the quality requirements for oil and gas well drilling are increasing.A design scheme for a wellbore wireless electromagnetic short transmission system based on field programmable gate array(FPGA)is proposed to address the key issue of how to efficiently and accurately transmit data near the drill bit across the screw drilling tool to the measurement while drilling system.XC6SLX16 FPGA chip is used to reduce circuit design difficulty and improve circuit design uniformity.Based on the principle of wireless electromagnetic transmission in the wellbore and binary frequency shift keying technology,modula⁃tion and demodulation of signals are achieved.The Fast Fourier Transform(FFT)algorithm is introduced to accelerate the acquisition of spectral information of the signal and the demodulation of the signal is completed.Using the Modelsim simulation tool for verification,the results show that the FFT algorithm not only achieves fast differentiation between the target signal and other signals,but also significantly improves the accuracy and reliability of signal transmission.

关 键 词：二进制频移键控 近钻头 无线电磁短传 现场可编程门阵列 快速傅里叶变换算法 

分 类 号：TE921[石油与天然气工程—石油机械设备] TN919[电子电信—通信与信息系统]