【摘要】 以永新工区高精度采集的地震资料为例,对高精度勘探的面元细分方法及细分处理资料的分辨率进行了评价。首先给出了面元细分的方法及面元细分对地震资料分辨率的影响,介绍了现有的一些分辨率计算方法。对于纵向分辨率,主要从λ/4传统薄层分辨率和高截频二个方面进行了讨论;对于横向分辨率,从菲涅耳带半径、防空间假频、Lindsey分辨率定义、考虑偏移孔径的分辨率等四个方面进行了分析、比较。通过研究,得出了有一定借鉴意义的结论:①在现有常规检波器条件下,面元细分处理对地震资料的分辨率影响较小,其变化不大;②在单道记录信噪比已较高的情况下,想通过提高覆盖次数来提高资料的分辨率,其提升空间有限;③就横向分辨率而言,考虑偏移孔径的计算方法,结果比较准确;④对于东部地区,从性价比上考虑,覆盖次数150,200已能满足要求,太高的覆盖次数没有从本质上改进资料的质量。更多还原

【Abstract】 This article analyzes the method of bin-dividing seismic data processing in high resolution seismic exploration and evaluates the resolution of processed seismic data in YongXin area.Firstly,we present the method of bin-dividing,introduce the effects of bin-dividing method and recommend some methods of resolution calculation.For vertical resolution,the main rules to evaluate the resolution are traditional laminar layer (λ/4) and high cutoff frequency.For horizontal resolution,there are a lot of evaluation rules,such as Fresnel zone radius,spatial alias,definition of Lindsey resolution,resolution of migration aperture,etc.Through our study,we can get some significant conclusions:① Bin-dividing processing has little influence on resolution in the condition of conventional geophones;② with high S/N in single trace,it’s useless to enhance resolution by increasing fold;③ For horizontal resolution,the method based on migration aperture works better and ④ In east China area,the fold of seismic exploration between 150 and 200 is well considering exploration costs.High fold can not enhance the quality of seismic data essentially.更多还原