Response characteristics of the orthogonal antennas of electromagnetic azimuthal resistivity measurement while drilling (MWD) tool for coal mining
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 det...
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Editorial Office of Coal Geology & Exploration
2025-02-01
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| Series: | Meitian dizhi yu kantan |
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| Online Access: | http://www.mtdzykt.com/article/doi/10.12363/issn.1001-1986.24.09.0593 |
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| author | Gang CHEN |
| author_facet | Gang CHEN |
| author_sort | Gang CHEN |
| collection | DOAJ |
| description | 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 complicates 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. Furthermore, 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. |
| format | Article |
| id | doaj-art-bd94b77e6dc649df985ee7a6878bfc09 |
| institution | DOAJ |
| issn | 1001-1986 |
| language | zho |
| publishDate | 2025-02-01 |
| publisher | Editorial Office of Coal Geology & Exploration |
| record_format | Article |
| series | Meitian dizhi yu kantan |
| spelling | doaj-art-bd94b77e6dc649df985ee7a6878bfc092025-08-20T02:52:52ZzhoEditorial Office of Coal Geology & ExplorationMeitian dizhi yu kantan1001-19862025-02-0153216016610.12363/issn.1001-1986.24.09.059324-09-0593chengangResponse characteristics of the orthogonal antennas of electromagnetic azimuthal resistivity measurement while drilling (MWD) tool for coal miningGang CHEN0CCTEG Xi’an Research Institute (Group) Co., Ltd., Xi’an 710077, ChinaObjective 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 complicates 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. Furthermore, 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.http://www.mtdzykt.com/article/doi/10.12363/issn.1001-1986.24.09.0593electromagnetic azimuthal resistivity measurement while drilling (mwd) tool for coal mininghorizontal well for a coal seamfinite element numerical simulationcoil array design |
| spellingShingle | Gang CHEN Response characteristics of the orthogonal antennas of electromagnetic azimuthal resistivity measurement while drilling (MWD) tool for coal mining Meitian dizhi yu kantan electromagnetic azimuthal resistivity measurement while drilling (mwd) tool for coal mining horizontal well for a coal seam finite element numerical simulation coil array design |
| title | Response characteristics of the orthogonal antennas of electromagnetic azimuthal resistivity measurement while drilling (MWD) tool for coal mining |
| title_full | Response characteristics of the orthogonal antennas of electromagnetic azimuthal resistivity measurement while drilling (MWD) tool for coal mining |
| title_fullStr | Response characteristics of the orthogonal antennas of electromagnetic azimuthal resistivity measurement while drilling (MWD) tool for coal mining |
| title_full_unstemmed | Response characteristics of the orthogonal antennas of electromagnetic azimuthal resistivity measurement while drilling (MWD) tool for coal mining |
| title_short | Response characteristics of the orthogonal antennas of electromagnetic azimuthal resistivity measurement while drilling (MWD) tool for coal mining |
| title_sort | response characteristics of the orthogonal antennas of electromagnetic azimuthal resistivity measurement while drilling mwd tool for coal mining |
| topic | electromagnetic azimuthal resistivity measurement while drilling (mwd) tool for coal mining horizontal well for a coal seam finite element numerical simulation coil array design |
| url | http://www.mtdzykt.com/article/doi/10.12363/issn.1001-1986.24.09.0593 |
| work_keys_str_mv | AT gangchen responsecharacteristicsoftheorthogonalantennasofelectromagneticazimuthalresistivitymeasurementwhiledrillingmwdtoolforcoalmining |