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。
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.
作者
杨广宪
Yang Guangxian(Geophysical Prospecting Research Institute,CNACG,Zhuozhou,Hebei 072750)
出处
《中国煤炭地质》
2021年第3期64-69,共6页
Coal Geology of China
关键词
侏罗纪
古河道
时频分析
小波变换
榆神矿区
Jurassic Period
paleochannel
time-frequency analysis
wavelet transform
Yushen mining area
