弯曲测线野外施工条件分析
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摘要
应用几何地震学研究方法,计算了弯曲测线坐标,实际偏移距产生的剩余时差。由于偏移距对地震剖面质量影响较大,因此,有必要对弯曲测线野外施工条件进行分析。弯曲测线拐角太长,引起剩余时差,剩余时差是造成资料处理中迭加效果不佳的主要原因。研究认为,弯曲测线在资料处理中面元应选择在300m之内,同时野外施工中弯曲测线拐角应小于45°。
The coordinate of crooked lines and the residual moveout caused by actual offset distance were calculated by geometric seismology method. Due to the significant effects of offset distance on seismic profLle quality, it is necessary to analyze the field work condition for crooked lines. It is concluded that the residual moveout caused by the comer of a crooked line is the major factor that lead to poor stacking result in seismic data process. The author recommend bins in crooked line data process should be less than 300m, and comers in field work less than 45°.
The coordinate of crooked lines and the residual moveout caused by actual offset distance were calculated by geometric seismology method. Due to the significant effects of offset distance on seismic profLle quality, it is necessary to analyze the field work condition for crooked lines. It is concluded that the residual moveout caused by the comer of a crooked line is the major factor that lead to poor stacking result in seismic data process. The author recommend bins in crooked line data process should be less than 300m, and comers in field work less than 45°.
引文
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