| 榆神矿区古河道研究与时频分析技术 |
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| 引用本文： | 杨广宪.榆神矿区古河道研究与时频分析技术[J].中国煤炭地质,2021(3):64-69. |
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| 作者姓名： | 杨广宪 |
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| 作者单位： | 中国煤炭地质总局地球物理勘探研究院 |
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| 摘 要： | 受区域地质构造及水文地质条件影响,榆神矿区煤系上覆地层中存在较厚的松散岩类孔隙潜水含水层。含水层因厚度不同导致富水性存在差异,其厚度与富水性强弱呈正相关关系,通常古河道及低洼中心区域沉积较厚,富水性较强。在榆神矿区地震勘探工作中,为解决煤层上覆松散岩层厚度及古河道空间展布规律,应用时频分析技术,对地震数据进行频谱分解处理,选择对地质体响应较好的频率进行成像,定量揭示了古河道及松散岩层的精细分布。应用表明,该技术对解决古河道等隐蔽性地质体成像具有显著的优势。
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| 关 键 词： | 侏罗纪 古河道 时频分析 小波变换 榆神矿区 |
Paleochannel Research and Time-frequency Analysis Technology in Yushen Mining Area |
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| Yang Guangxian.Paleochannel Research and Time-frequency Analysis Technology in Yushen Mining Area[J].Coal Geology of China,2021(3):64-69. |
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| Authors: | Yang Guangxian |
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| Institution: | (Geophysical Prospecting Research Institute,CNACG,Zhuozhou,Hebei 072750) |
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| Abstract: | Impacted by regional geological structures and hydrogeological condition,the coal measures overlying strata have existed rather thick loose petrographic phreatic aquifer in the Yushen mining area.Due to different thicknesses of aquifer have lead to water yield property differences;between thickness and water yield property strong or weak has presented positive correlation.Usually,sediments in paleochannel and low-lying central areas are thicker with stronger water yield property.During the seismic prospecting in Yushen mining area,in order to solve coal seam overlying loose strata thickness and paleochannel spatial spread pattern have applied time-frequency analysis technology carried out seismic data frequency spectrum resolving processing.Frequencies with better geologic body response have been selected to carry out imaging,quantitatively revealed exact distribution of paleochannel and loose strata.The application has shown that the technology has notable advantages in paleochannel etc concealed geologic bodies imaging. |
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| Keywords: | Jurassic Period paleochannel time-frequency analysis wavelet transform Yushen mining area |
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