Thanks to achievements in rock-physics geologists and reservoir engineers widely use results of seismic inversion. The main question for the experts applying seismic impedances is how to integrate the different scales of studies: from microsections to seismic frequencies. In this paper for development of oilfield litho-facial model we suggest to use multi-layered amplitude inversion (MLI) in which the solution is sought for the individual layers, being characterized by particular lithological and petrophysical properties. Realization of MLI is a problem of collaboration of geologists and geophysicists. Only in this case, we understand what thickness, lithology, facies and petrophysical parameters are characterized each of the layers at the output impedances volume. The presented results obtained on the basis of the algorithm of MLI developed by the authors showed increase informativeness of acoustic and elastic impedance estimates in case of high contrast medium. The resulted layered model makes it easier to litho-facial and petrophysical interpretation of the data, for example, by the using of different rock-physics models for each individual layer. The presented decision allows in future to take into account the anisotropy of the layers, and to implement layered stochastic downscaling.


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