石油物探2017，Vol.56Issue(6)：798-803,6.DOI:10.3969/j.issn.1000-1441.2017.06.004
基于环境噪声的地震响应重建方法及应用
Technique for seismic response retrieval from ambient noise and its application
摘要
Abstract
Useful seismic responses such as direct arrivals and surface waves can be retrieved from ambient noise using passive interferometry,which can be further used for building near-surface velocity models.Unfortunately,ambient noise occurs randomly,and its record shows obvious chaos and disorder.Hence,it is challenging to preprocess the ambient noise and retrieve a valuable seismic response.In this study,to overcome the shortcoming of using only the causal Green function to retrieve virtual source gather,an improved method for virtual source gather retrieval by summation processing is proposed,which mainly includes amplitude regularization,seismic traces mutual coherence or cross-correlation,and summing the causal and non-causal Green functions.The surface wave signals in the retrieved seismic responses were improved and enhanced.Finally,the method is applied to ambient noise data acquired along a railway line to retrieve seismic responses.The results indicate that direct arrivals and surface waves can be effectively retrieved from ambient noise,which could be further used for travel-time tomography and surface wave inversion as well as building near-surface P-wave and S-wave velocity models.关键词
环境噪声/被动源地震干涉/虚源道集构建/振幅规则化/面波记录Key words
ambient noise/passive interferometry/virtual source gather retrieve/amplitude regularization/surface wave record分类
天文与地球科学引用本文复制引用
陈国金,郭建,张亚红,吴永栓,徐善辉,曹辉..基于环境噪声的地震响应重建方法及应用[J].石油物探,2017,56(6):798-803,6.基金项目
中国石化科技部项目(P13030)资助.This research is financially supported by Sinopec Corp.Project (Grant No.P13030). （P13030）
