低信噪比强线性干扰区地震采集方法探讨——南鄱阳凹陷西区地震采集方法初探

Discussion on seismic acquisition in an area having lower S/N ratio and strong linear interference:preliminary study for seismic acquisition method in west of south Boyang depression

针对南鄱阳凹陷西区“千层饼”式的复杂表层结构 ,利用双井微测井的动力学特征 ,确定野外最佳激发井深 ,为野外选取激发井深提供了一种更科学、直观和经济的方法。此外 ,结合大量的表层结构调查工作 ,提出了真假潜水面这一概念。通过时频分析和频时分析等量化分析技术 ,进行低信噪比的试验资料的分析 ;利用纯波单炮和优势频带滤波 ,评价单炮记录的资料品质 ;

Aiming at “sandwich”style's complicated surface structure in west of south Boyang depression,we use dynamic character of uphole survey in double well to determine optimum shot hole depth in field operation,which provided a more scientific,straightforward and economic tool for selecting shot hole depth in the field.Meanwhile,the conception of true or false water table is presented combining a large amount of investigating job for surface structure.The analytic method for trial data having lower S/N ratio by using quantitative analysis tools such as time frequency analysis and frequency time analysis and tool using single shot record with pure wave and filtering with predominant frequency band for appreciation of data quality in single shot record provided a use for reference to later analyzing data in similar area.