煤田地质与勘探2025，Vol.53Issue(2)：160-166,7.DOI:10.12363/issn.1001-1986.24.09.0593
矿用随钻方位电磁波仪器正交天线响应特征
Response characteristics of the orthogonal antennas of electromagnetic azimuthal resistivity measurement while drilling(MWD)tool for coal mining
摘要
Abstract
[Objective and Methods]This study aims to determine the factors influencing the detection performance of the electromagnetic azimuthal resistivity measurement while drilling(MWD)tool for coal mining in horizontal wells.Through finite element numerical simulations,this study conducted boundary detection using orthogonal coupling coils with multiple frequencies and coil pitches.This allowed for determining the optimal asymmetric arrangement of coils,as well as the optimal working parameters of frequency,source-detector separation distance,and coil pitch suitable for high-resistivity coal seams.[Results and Conclusions]The comparative study of orthogonal and inclined coils reveals that in the case of directional signals of inclined coils,although the amplitude ratio signals were theoretically enhanced with an increase in the coil pitch,the actual amplitude of induced electromotive force in inclined coils decreased.This complic-ates signal acquisition.This study designed an orthogonal coil array structure for electromagnetic azimuthal resistivity measurement for coal mines,enabling concurrent resistivity and interface detection for high-resistivity coal seams.Fur-thermore,this study obtained the optimized parameters of frequency,source-detector separation distance,and coil pitch for mining of these coal seams.The results of this study provide a basis for electromagnetic azimuthal detection along coal seams in wells in underground coal mines.关键词
随钻电磁波仪器/煤层水平孔/有限元模拟/线圈系设计Key words
electromagnetic azimuthal resistivity measurement while drilling(MWD)tool for coal mining/horizontal well for a coal seam/finite element numerical simulation/coil array design分类
天文与地球科学引用本文复制引用
陈刚..矿用随钻方位电磁波仪器正交天线响应特征[J].煤田地质与勘探,2025,53(2):160-166,7.基金项目
中煤科工集团科技创新项目(2022-2-TD-MS005,2023-2-TD-ZD002,2022-2-TD-ZD006,2023-TD-QN008) （2022-2-TD-MS005,2023-2-TD-ZD002,2022-2-TD-ZD006,2023-TD-QN008）
国家重点研发计划课题(2022YFC3005905-3) （2022YFC3005905-3）
