摘要
受野外采集噪声和叠前预处理方法的影响,共中心点道集(CMP)和共反射点道集(CRP)内各道品质差异较大,此时传统等权叠加不能得到高信噪比结果。为此,本文提出在一定时窗或整个时窗范围内,综合CMP或CRP道集内各道地震记录的振幅、频率、炮检距以及入射角等因素衡量地震资料的品质,综合确定加权系数进行非等权优化叠加,以有效改善叠加结果。理论模型分析和实际数据处理结果表明:非等权系数的综合优化叠加方法可以更有效地去除噪声,提高资料的信噪比。
Trace quality in common middle point(CMP)gather or common reflection point(CRP)g ather are quite different due to field noise and preprocessing methods.Conventional stacking methods cannot get high signal-to-noise ratio result in this situation.We propose in this paper a new stacking method.We first analyze amplitude,frequency,offset and incidence angle of each trace in a CMP or CRP gather within a window to measure the quality of each trace,and then estimate a comprehen-sive weight for stacking.Finally we can realize a comprehensive weighted stacking.Applications of the method to synthetic and field data show that this approach is more effective in suppressing noise than conventional stacking methods.
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2014年第6期1068-1076,2,共9页
Oil Geophysical Prospecting
关键词
加权叠加
信噪比
优势频率
炮检距
入射角
weighted stacking,signal-to-noise ration,dominant frequency,offset,angle of incidence