An experimental study on the high-resolution single-channel seismic exploration technology for inland shallow waters
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摘要: 单道地震探测技术以其配置灵活、简便高效、分辨率高的优势,在海洋区域地质调查、近海工程物探等领域得到了广泛的应用,但在内陆江河湖区域的实际应用案列较少。本文以河北雄安新区白洋淀为例,开展内陆浅水区高分辨率单道地震探测技术试验研究;对关键的采集参数,包括激发能量、激发间隔、航行速度以及接收单元个数等进行实际效果对比,以确定最优的参数组合;制定一套内陆浅水区单道地震数据处理流程及方法技术组合,逐步衰减各类干扰噪声,最大程度地提高内陆浅水区单道地震剖面的信噪比及分辨率。试验结果表明,内陆浅水域单道地震探测技术能够精细划分水域浅层地质结构,并与钻探资料吻合较好,有效地支撑服务江河湖环境、地质、地质灾害的调查研究。Abstract: With the advantages of flexible configuration,convenience,high efficiency,and resolution,the single-channel seismic detection technology has been widely used in marine geological surveys and offshore engineering geophysical prospecting.However,there are few cases of the application of this technology in inland rivers and lakes.Therefore,an experimental study on the high-resolution single-channel seismic detection technology targeting the inland shallow waters of Baiyangdian Lake,Xiongan New Area,Hebei Province was conducted.The application effects using key acquisition parameters,including excitation energy,excitation interval,sailing speed,and the number of receiving units,were compared to determine the optimal parameter combination.A set of single-channel seismic data processing processes and methods for inland shallow waters were developed to gradually attenuate all kinds of noises and improve the signal-to-noise ratio and resolution to the greatest extent.The experimental results show that the single-channel seismic detection technology for inland shallow waters can finely divide the shallow stratigraphic structure in the waters.Moreover,the division effects agree well with drilling data.Therefore,this technology can effectively support the investigations of environment,geology,and geologic hazards in inland rivers and lakes.
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