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矿用随钻动态方位伽马仪器的研制与应用

陈龙 陈刚 张冀冠

陈龙,陈刚,张冀冠.矿用随钻动态方位伽马仪器的研制与应用[J].煤田地质与勘探,2022,50(1):86−91. doi: 10.12363/issn.1001-1986.21.10.0599
引用本文: 陈龙,陈刚,张冀冠.矿用随钻动态方位伽马仪器的研制与应用[J].煤田地质与勘探,2022,50(1):86−91. doi: 10.12363/issn.1001-1986.21.10.0599
CHEN Long,CHEN Gang,ZHANG Jiguan.Development and application of a mine-used dynamic azimuth gamma instrument while drilling[J].Coal Geology & Exploration,2022,50(1):86−91. doi: 10.12363/issn.1001-1986.21.10.0599
Citation: CHEN Long,CHEN Gang,ZHANG Jiguan.Development and application of a mine-used dynamic azimuth gamma instrument while drilling[J].Coal Geology & Exploration,2022,50(1):86−91. doi: 10.12363/issn.1001-1986.21.10.0599

矿用随钻动态方位伽马仪器的研制与应用

doi: 10.12363/issn.1001-1986.21.10.0599
基金项目: 陕西省重点研发计划项目(2020GY-089);中煤科工集团西安研究院有限公司科技创新基金项目(2020XAYDC01)
详细信息
    第一作者:

    陈龙,1984年生,男,陕西西安人,博士,副研究员,从事煤矿井下钻探技术与装备研究工作. E-mail:chenlong@cctegxian.com

  • 中图分类号: P631

Development and application of a mine-used dynamic azimuth gamma instrument while drilling

  • 摘要: 顺煤层瓦斯抽采钻孔是目前最直接最有效的瓦斯治理方法,自然伽马作为含煤地层识别常用的判识依据,可以根据地层放射性判断钻孔轨迹是否在目标层中。但现有的矿用伽马测井仪器只能进行滑动钻进测量,不适用于复合钻进及旋转导向钻进,无法满足伽马动态连续测量的工况。针对以上问题,在分析了煤矿井下随钻测量工况特点和伽马测井原理的基础上,通过低压直流载波双向通信技术进行孔底多扇区方位伽马数据的实时传输;采用屏蔽开窗的结构设计,实现单伽马晶体的8扇区分区测量;基于三轴MEMS加速度传感器和三轴MEMS陀螺仪不同的频率特性,采用互补滤波的动态测量方法,克服了回转钻进过程中振动和旋转对工具面向角测量的影响。通过地面性能测试和井下的工业性试验,验证了仪器在不同放射性地层分界面能正确反映出地层放射性变化规律。试验结果表明,仪器可以满足复合回转定向钻进时的地质导向测量要求,为煤矿井下顺煤层定向钻进提供了技术保障。

     

  • 图  上下方位伽马计数曲线关系

    Fig. 1  Gamma counting curves of the upper and lower azimuth

    图  仪器电气框图

    Fig. 2  Electrical block diagram of the instrument

    图  方位伽马屏蔽开窗结构

    Fig. 3  Azimuth gamma shielding window structure

    图  互补滤波器模型

    Fig. 4  Complementary filter model

    图  重力加速度提取算法运算结果

    Fig. 5  Results of the gravity acceleration extraction algorithm

    图  地面试验测试结果

    Fig. 6  Ground test results

    图  上下伽马曲线和钻孔轨迹地层岩性

    Fig. 7  Upper and lower gamma curves and borehole trajectory stratigraphic lithology maps

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出版历程
  • 收稿日期:  2021-10-31
  • 修回日期:  2021-11-23
  • 发布日期:  2022-02-01
  • 网络出版日期:  2022-01-27

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