• 论文
主办单位:煤炭科学研究总院有限公司、中国煤炭学会学术期刊工作委员会
钻柱振动录井技术的时频分析方法研究
  • Title

    Research on time-frequency analysis method of drill string vibration logging technology

  • 作者

    刘金锁刘盛东张维鑫金标呼邦兵

  • Author

    LIU Jinsuo, LIU Shengdong,ZHANG Weixin,JIN Biao,HU Bangbing

  • 单位

    中国矿业大学 资源与地球科学学院中国矿业大学 深部岩土力学与地下工程国家重点实验室中国矿业大学 地球科学与测绘工程学院

  • Organization
    1.School of Resources and Earth Sciences, China University of Mining and Technology, Xuzhou ,China;2.State Key Laboratory of Geomechanics & Deep Underground Engineering, China University of Mining and Technology, Xuzhou , China;3.School of Earth Sciences and Surveying Engineering, China University of Mining and Technology, Beijing , China
  • 摘要

    钻头破岩时信号往往是一种非平稳、非线性的信号。为提取破岩时的有效信号,采用钻柱振动录井技术,通过在钻头后安装三分量加速度传感器采集破岩时的振动信号;分别采用短时傅里叶变换、小波变换、Hilbert-Huang变换等不同的时频分析方法,对数值模拟信号处理分析,以对比各种分析方法在时间分辨率、频率分辨率等方面的优缺点。通过比较不同的时频分析方法特点,采用短时傅里叶变换对贵州某矿的实采数据处理分析,结合时频信号在不同位置的特征来确定钻进过程中岩性变化的位置以及钻机不同工作状态的改变。研究结果表明:破岩较破煤时,200 Hz以下能量比破煤的能量强5倍以上,400 Hz和800 Hz位置能量较破煤时更明显,破岩仍具有很强能量,破煤只能在对应位置看到极少量能量,800 Hz以上破煤就无能量。钻机旋转未破岩在200 Hz和400 Hz都有很少能量,能量值不足破岩和破煤时的百分之一,钻机在水平进退钻时只存在10Hz以下原有钻机工作的固有低频。 钻柱振动录井技术対岩性划分和钻机工作状态的确定可为实际矿井钻探提供有力技术支撑。

  • Abstract
    In order to extract effective signals during rock breaking, drill string vibration logging technology was adopted, and three component accelerometer was installed behind the drill bit to collect vibration signals during rock breaking. Different time-frequency analysis methods such as short-time Fourier transform, wavelet transform and Hilbert-Huang transform are used to analyze the numerical simulation signal processing to compare the advantages and disadvantages of various analysis methods in terms of time resolution and frequency resolution. By comparing the characteristics of different time-frequency analysis methods, it is decided to use the short-time Fourier transform to analyze the actual data of a mine in Guizhou,the position of lithology change and the change of working state of drilling rig are determined according to the characteristics of time-frequency signals in different positions. The study results show:when rock breaking is compared with coal breaking, the energy below 200 Hz is more than 5 times stronger than that of coal breaking. The energy at 400 Hz and 800 Hz position of energy are more obvious, coal breaking can only see very little energy in the corresponding position, and coal breaking above 800 Hz has no energy. The drilling rig has little energy at 200 Hz and 400 Hz, and its energy value is less than 1% of that at breaking rock and coal. When the drilling rig advances and retreats horizontally, there is only the inherent low frequency of the original rig working below 10 Hz.The division of lithology and determination of drilling rig working status by drill string vibration logging technology can provide strong technical support for actual mine drilling.
  • 关键词

    钻柱振动录井时频分析岩性划分钻机工作状态矿井钻探

  • KeyWords

    drill string vibration logging; time-frequency analysis; lithology determination;rig working state;mine drilling

  • 基金项目(Foundation)
    国家重点研发计划资助项目(2016YFC0600902);国家自然科学基金委员会与神华集团有限责任公司联合资助重点资助项目(U1261202);阳泉煤业集团联合资助项目(2018 3003 2)
  • 图表
相关问题

主办单位:煤炭科学研究总院有限公司 中国煤炭学会学术期刊工作委员会

©版权所有2015 煤炭科学研究总院有限公司 地址:北京市朝阳区和平里青年沟东路煤炭大厦 邮编:100013
京ICP备05086979号-16  技术支持:云智互联