摘要
野外采集的三分量微地震资料,通常能量弱,信噪比低,频率高,震源未知,波场复杂。常规的极化滤波方法通常选择固定的某一分量作为期望滤波的方向,已不能满足当前处理的要求。为此,在极化滤波的基础上,通过改进算法,设计了自适应极化滤波方法。该方法通过计算相邻道三分量信号偏振投影的最大互相关系数得到波的跟踪分量,把波的跟踪分量作为极化滤波因子的期望方向,改进常规滤波因子,实现自适应极化滤波。实际资料处理结果表明,该方法理论正确,处理效果也得到了明显的改善。
Three-component microseismic data are characterized by low energy,low signal-to-noise ratio,high frequency,unknown sources,and complex wavefield.Conventional polarization filtering can not meet the demands of microseismic data processing due to its predefined output direction.The author put forward an adaptive polarization filtering method.This method determines the wave track component by correlating the polarization projections of adjacent multi-component traces.The wave track component is then viewed as the direction of polarization filtering operator.Results of real data processing confirm the correctness of the proposed method.
出处
《勘探地球物理进展》
2010年第5期367-371,共5页
Progress in Exploration Geophysics
关键词
微地震
跟踪分量
自适应极化滤波
passive seismic
track component
adaptive polarization filtering
