导向钻具动态测量的三稳随机共振频率提取  

Frequency extraction of tri-stable stochastic resonance system for dynamic measurement of steering drilling tool

作　　者：杨一 周可馨 张楠[1,2] 郭安 Yang Yi;Zhou Kexin;Zhang Nan;Guo An(Shaanxi Key Laboratory of Measurement and Control Technology for Oil and Gas Wells,Xi′an Shiyou University,Xi′an 710065,China;College of Electronic Engineering,Xi′an Shiyou University,Xi′an 710065,China)

机构地区：[1]西安石油大学陕西省油气井测控技术重点实验室,西安710065 [2]西安石油大学电子工程学院,西安710065

出　　处：《仪器仪表学报》2024年第12期295-306,共12页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金(52174005);西安石油大学研究生创新基金(YCX2413096)项目资助。

摘　　要：在随钻测量过程中,由于钻头切削岩层、钻柱与井壁的碰撞等导致底部钻具产生强烈振动,使钻具动态测量信号淹没在复杂的噪声环境中,对钻具姿态测量产生严重干扰,造成钻具导向控制无效。针对这一问题,利用三稳非线性系统所产生的动力学特性,即随机共振效应对导向钻具动态测量信号的频率进行提取。首先,提出基于尺度变换三稳系统的随机共振频率识别方法,解决钻具动态测量信号的应用限制;然后,研究势函数特征参数对系统共振输出作用的影响规律,并设计相应的势函数特征参数调整方案,实现任意噪声强度下钻具动态测量信号的频率提取。仿真和实钻数据实验结果表明,所提方法可提取信号的信噪比(SNR)阈值低至-19.5 dB,并且可靠性优于双稳态系统,证明了方法的有效性和稳定性。In the process of measurement while drilling,the dynamic measurement signal of the drilling tool is often submerged in a complex noise environment.This noise is primarily caused by the strong vibrations of the bottom drilling tool,which result from the drill bit cutting through rock layers and the collisions between the drill string and the borehole wall.Such interference severely affects the attitude measurement of the drilling tool,leading to ineffective guidance and control.In order to solve this problem,this paper uses the dynamic characteristics generated by the tri-stable nonlinear system,that is,the random resonance effect,to extract the frequency of the dynamic measurement signal of the steering drilling tool.Firstly,a random resonance frequency identification method based on the scale transformation tri-stable system is proposed to solve the application limitation of the dynamic measurement signal of the drilling tool.Then,the influence of the characteristic parameters of the potential function on the resonance output of the system is studied,and the corresponding adjustment scheme of the characteristic parameters of the potential function is designed to realize the frequency extraction of the dynamic measurement signal of the drilling tool under any noise intensity.The experimental results of simulation and real drilling data show that the SNR threshold of the signal extracted by the proposed method is as low as-19.5 dB,and the stability is better than that of bis-table systems,which proves the effectiveness and stability of the proposed method.In the process of measurement while drilling,due to the strong vibration of the bottom drilling tool caused by the collision of the drill bit cutting the rock layer and the collision between the drill string and the borehole wall,the dynamic measurement signal of the drilling tool is submerged in the complex noise environment,which seriously interferes with the attitude measurement of the drilling tool,resulting in the ineffective guidance control of the drilling

关 键 词：导向钻具动态测量 随机共振 三稳非线性系统 频率提取 

分 类 号：TH89[机械工程—仪器科学与技术] TE242[机械工程—精密仪器及机械]