Remote evaluation of the mobility characteristics of a fluid enclosed in the pores of subsurface rocks is an issue of the major interest in the petroleum industry. In a last decade several techniques to perform such an evaluation based on attributes derived from seismic images have been proposed. Although these techniques have foundation in theory and have delivered results of reasonable quality in a number of cases, they are still considered experimental and sparsely used in industry. It is due to the fact that enormous complexity of the recorded seismic data makes any interpretation impossible without a sophisticated procedure of seismic imaging. This procedure in turn introduces significant distortions in the data. The question whether subtle spectral effects characterizing a fluid moving in porous rocks are still observable after seismic imaging remains under debate. It is the question that is investigated in this paper from the signal processing prospective.
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