关键词: 格林函数, 被动源成像, 互相关, 反褶积, 虚拟炮集, 地震干涉

Abstract: Seismic interferometry allows us from records at any two receivers to synthesize waves that propagate between the receivers as if one of the receivers behaves as a source. From chaotic disorder seismic signals, this method can extract useful information, which can be used to infer the geological structure. Based on the theory of deconvolution seismic interferometry, the authors have made a more detailed derivation for the imaging formula. The implementation of imaging method demonstrates the feasibility of deconvolution algorithm in passive source seismic interferometry. We also compare the signal-to-noise ratio and resolution from deconvolution method with cross-correlation algorithm. More numerical calculations show that the vertical resolution from deconvolution is higher than cross-correlation,method and after summation over sources deconvolution has a high signal to noise ratio.

Key words: Green&rsquo, s function, passive source imaging, cross-correlation, deconvolution, virtual shot gathers, seismic interferometry