22 May 2018

With the Marchenko method one can derive an incident wavefield (a so-called focusing function) that focuses at an arbitrary location inside a medium and subsequently continues as a diverging wavefield. This is often denoted as creating "virtual sources” inside a medium. In this talk you will learn how such a focusing function can be obtained by iteratively sending a wavefield into a medium and simultaneously recording its reflection response. This requires control over densely sampled sources and receivers at the surface of an object in combination with an a-priory known smooth velocity model. Further, this talk teaches you how the result of the Marchenko scheme can be used for target-oriented seismic modeling, which is of use for localized inversion and time-lapse reservoir monitoring.

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