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| | Abstract | | Passive seismic imaging by interferometry in data domain and in image domain are compared using synthetic seismic data of a simple structure model. The motivation of this study is to clarify process and characteristics of image formation by the two approaches and if there are any advantages and disadvantages between the two approaches. Comparison of the reconstruction of the image of reflectors shows that the image of active data is formed by focusing of the phase to the reflectors, whereas, the image of passive data is formed by spatial interference and suppressing artifacts. Two approaches of passive seismic imaging are basically almost identical except the basic wavelet. In result, insufficient retrieval of virtual shot records by interferometry in data domain does not necessarily result in an insufficient image reconstruction. Spacing and distribution of receivers are key to passive image reconstruction. |
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