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| | Abstract | | Seismic interferometry is a process of generating pseudo seismic data from existing wavefields. This method enables us to expand a degree of the freedom of source-receiver configuration. Seismic interferometry by multidimensional deconvolution ,MDD, is proposed as an alternative to the conventional crosscorrelation method. We apply the MDD to crosswell geometry in order to retrieve crosswell impulse responses from transient surface sources placed at the ground. This application is examined using numerical modeling and field data. We adopted singular-value decomposition pseudoinverse solution to achieve MDD. Because SVD pseudoinverse is dependent on the choice of the singular values, AIC is evaluated to determine the rank for SVD solution. We revealed that MDD produces higher-resolution data than that from the conventional crosscorrelation method. Furthermore, amplitudes of downgoing reflection events are improved in MDD while downgoing reflection events are not recognizable in the crosscorrelation method. |
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