We here provide an analysis of observed wavefield for the downhole microseismic observations. The particular feature of the dataset that needed a careful explanation was an observation of reflected waves in the major part of the dataset and their absence in the other part of the dataset. This issue was addressed with numerical modeling to assure ourselves about the nature of the observed reflections the observed time delays are in a good agreement with modeling results. We finalize our research with numerical proof of the important improvement of inverse problem by taking into account reflected waves data #CSOC1120.