一种适用于沿海滩涂区的浅层高精度地震探测技术

A technology applied to shallow high-precision seismic detection in coastal tidal flats

受地质勘探设备和潮汐时间的制约,沿海滩涂区地质探测程度低,探测精度不足,无法满足沿海滩涂区高精度地质调查的需求。常规浅层地震勘探技术虽能有效地探测到沿海滩涂区浅层第四系底界面及内部层位,但其数据采集仪器设备复杂、采集效率低,直接制约着沿海滩涂区地震探测工作。为此,笔者提出一种适用于沿海滩涂区的高精度地震探测技术,充分利用沿海滩涂区地表地势平坦的特征,采用改造的拖曳式地震探测设备开展数据采集工作,能够有效解决上述困难,为受潮汐影响严重的沿海滩涂区地震探测提供一种新思路;同时,制定了一套针对沿海滩涂区的地震探测信号提取流程和方法组合,最大程度地保留有效地震反射信息,还原滩涂区地下地层结构;在沿海滩涂区实际应用中的效果表明,该技术完全能够为滩涂区地下地层精细划分提供真实可靠的数据支持。

Due to the restriction of geological detection equipment and tidal time,the degree of geological exploration in coastal tidal?flat areas is low and the detection accuracy is insufficient,which cannot meet the demand of high?precision geological survey in this area.Conventional shallow seismic exploration technology can effectively detect Quaternary bottom interface and internal horizons in the coast?al tidal flats,but it has a complex and inefficient data?acquisition equipment,which directly restricts the progress of seismic exploration in this area.Therefore,this paper proposes a high?precision shallow seismic detection technology which is suitable for coastal tidal?flat areas.It can effectively solve the above difficulties by making full use of the surface characteristics in coastal tidal flats and using modi?fied towed seismic detection equipment to acquire field data,thus providing a new idea for seismic detection in this area.At the same time,a set of seismic signal extraction process and method combinations are made for coastal tidal?flat areas,which can retain effective seismic reflection information to the greatest extent and restore the underground geological structure.The results of the application show that the technology can provide reliable data support for the fine division of subsurface in the coastal tidal flats.