高密度水域地震映像在海上造船厂勘察中的应用

The Application of Seismic Imaging Method to Water Exploration of Dockyard

介绍了水域高密度地震映像勘查方法,论述了该方法中震源技术、GPS定位及测量技术、数据采集技术和资料处理技术不同于常规浅层地震反射波法的特点。通过对造船厂的海上地震勘察,并结合地质钻孔资料对地震映像时间剖面进行了综合处理、分析和解释,作出了地震波探测解释剖面图、覆盖层厚度分布等值线图和基岩埋深等值线图,查明了该区水下地形的起伏和变化情况,覆盖层的分层、深度和分布情况以及基岩面的埋深、起伏与构造情况,为整个工程的设计和施工提供了科学依据。结果表明,地震映像资料解释结果与海上钻孔资料基本一致,地震映像法是一种用于海上探测行之有效的方法,在近海工程物探领域具有广阔的应用前景。

In this paper, high--density seismic imaging method working in water has been introduced. The seismic source technology, GPS and measurement technology, data acquisition technology, data processing technology and the characteristics which are different from conventional shallow earthquake reflection shooting have been discussed. The shipyard marine seismic surveys, drilling and geological information with seismic mapping of the time profile of a comprehensive processing, analysis and interpretation made a shock wave detection profiles, covered layer thickness distribution contour map and buried bedrock deep contour map to identify the underwater topography of the area and changes in the ups and downs, the stratified layers coverage, the depth and distribution of surface and the bedrock depth, the ups and downs and structure, for the whole project to provide the design and construction for the scientific basis. Results show that the seismic data interpretation and the sea drilling well data are basically the same, and seismic mapping method that is an effective sea exploration method in the field of offshore engineering geophysics has broadened the application prospects.