秦皇岛32—6构造高分辨率三维地震资料处理技术研究

海上高分辨率三维地震勘探资料的质量取决于野外采集，现场处理，勘探工区的地质条件等诸多。本文从资料品质分析入手，对不同海域地层高频衰减进行了对比，发现秦皇同地区河流相地层比南海ＬＤ地区海相地层反能量弱４－６ｄＢ这一规律。

Research on the processing technique for high-resolution 3-D seismic data from Qinhuangdao 32-6 structure

The quality of offshore high-resolution 3-D seismic data depends on data acquisition, data processing on the spot, geological condition of prospect and so on. By analysing and comparing the different high frequency attenuations due to formations in different off shore areas, the author has found that seismic reflection energies of river factes formation in off shore Qinhuangdao is 4-6dB weaker than those of marine factes formation in LD area in South China sea. In offshore Qinhuangdao,some unfavourable factors such as severe high frequency attenuation, low signal/noise ratio, weak reflection coefficient, discontinuous seismic event, too big line spacing and so on, restrict the improvement of seismic resolution. The experiment of revising technological process and parameters was made to achieve the improvements of velocity and high frequency DMO response in big line spacing condition,which are significant to seismic resolution amelioration. Experiments led to the conclusions that acquisition factor causes great influence on seismic data quality, that narrow bin grid severely distorts migration displacement and amplitude, that too big offset reduces the near traces which have high signal/noise ratio and high seismic resolution, and that the unstable depth and swing of seismic streamer have important effect on high frequency contents and bring the poor consistency problem of three-dimensional seismic lines.