摘要
地震技术方法是研究海底之下地层沉积特征的主要手段。针对地震资料特点和研究需求,开展了新近系以来的沉积特征的地震方法研究,利用资料净化、多次波压制和高分辨率岩性处理等技术方法,提高了地震资料的信噪比和分辨率;采用基于多道地震叠加速度资料基础的速度分析和时间—深度转换方法,保证了沉积地层埋藏深度的计算精度;以海洋地质学、地震地层学的方法为指导,预测地层岩相并评判了沉积环境。CSDP-1孔的钻探结果证明研究方法的有效性。
Seismic technology is the main tool for revealing sedimentary characteristics of the deposits under seabed.In the South Yellow Sea,it is an urgent need to carry out the research of seismic methods for better interpretation of sedimentary characteristics of the Neogene.The methods for data purification,multiple wave suppression and high resolution lithology identification have been adopted to improve the signal-to-noise ratio and resolution.Together with velocity analysis and time-depth conversion,multi-channel seismic stack velocity data are used to ensure the accurate calculation of the buried depth of strata.Following the principles of marine geology and seismic stratigraphy,depositional facies and evaluation of sedimentary environment are defined.CSDP-1hole is selected as the case to test the validity of the methods.
出处
《海洋地质前沿》
2015年第2期63-70,共8页
Marine Geology Frontiers
基金
国土资源部海洋地质调查专项(GZH201100202)
国家自然科学基金项目(41210005
41174098)
关键词
地震方法
多次波压制
岩性处理
速度分析
沉积特征
seismic method
multiple wave suppression
lithology processing
velocity analysis
sedimentary
