Numerous unconventional resources have become economically viable with the development of horizontal drilling and multi-stage hydraulic fracturing. Unconventional reservoirs have variable degrees of heterogeneity and identification of good and poor reservoir properties is essential for efficient development to define the economic limits of a resource play. An integrated, multi-disciplinary approach of correlating core facies to petrophysical wireline facies to seismic facies for tight unconventional sandstones is presented in this paper along with the results of a simultaneous, geostatistical seismic inversion. Seismic facies and reservoir rock properties, which are calibrated to wireline logs and core data, are mapped from 3D seismic inversion volumes. The maps provide a detailed understanding of the characteristics of the reservoirs, namely their spatial distribution, geometry, and internal architecture. This methodology demonstrates the tremendous value of incorporating stratigraphic, petrophysical, and geophysical data into a quantitative, integrated reservoir model.