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Study of reservoir properties and hydrocarbon saturation from 3D seismic is suggested to carry out using the combination of three independent seismic technologies:<br>- Optimal seismic inversion<br>- Seismofacial analysis basing on geosonic modeling<br>- HC saturation prognosis basing on frequency-dependent seismic attenuation.<br>The result of investigation is the geological facial model of oilfield including distribution of porosity, reservoir thickness and HC saturation.<br> <br>The examples obtained on oilfield in Western Siberia are provided.<br>