  Geophysical monitoring of subsurface reservoirs relies on detecting small
changes in the seismic response between a baseline and monitor study. However,
internal multiples, related to the over- and underburden, can obstruct the view
of the target response, hence complicating the time-lapse analysis. In order to
retrieve a response that is free from over- and underburden effects, the
data-driven Marchenko method is used. This method effectively isolates the
target response, which can then be used to extract more precise time-lapse
changes. Additionally, the method also reveals target-related multiples that
probe the reservoir more than once, which further define the changes in the
reservoir. To verify the effectiveness of the method, a numerical example is
constructed. This test shows that when using the isolated target response, the
observed time differences resemble the expected time differences in the
reservoir. Moreover, the results obtained with target-related multiples also
benefit from the Marchenko-based isolation of the reservoir. It is, therefore,
concluded that this method has potential to observe dynamic changes in the
subsurface with increased accuracy.
