Abstract:For fracturing-produced micro-earthquake data,we studied method of coherent filtering in frequency domain and polarization filtering in time domain.Firstly,we used left and right coherent degree to suppress noise in design of coherent filtering algorithm in frequency domain,strengthening useful signal;then implemented polarization filtering in time domain.In order to fully use the spatial correlation of useful signal,the computation only implementing in time domain before is changed to implement in both time and space domain for polarization filtering.Theoretical model and practical data showed that the method is theoretically correct and has good processing effect.
宋维琪, 孙英杰, 朱卫星. 微地震资料频域相干-时间域偏振滤波方法[J]. 石油地球物理勘探, 2008, 43(2): 161-167.
Song Wei-qi, Sun Ying-jie and Zhu Wei-xing. Method of coherent filtering in frequency domain and polarization filtering in time domain for micro-earthquake data. OGP, 2008, 43(2): 161-167.