This article presents a practical method of conducting integrated analysis for reservoir characterization whereby the well log and core data can be extrapolated away from the existing wells guided by seismic measurements. The lateral information of property variation is included in data integration by acoustic impedance inversion of 2D seismic survey. We were able to overcome the conventional limitations of the trace-based inversion by employing pseudo well logs to extract wavelet sources for each seismic line and by setting limited inversion area. Through the correlation analysis between different scales and types of data including seismic attribute (e.g., acoustic impedance), well log (e.g., sonic log) and core analysis data (e.g., porosity and permeability), we could generate porosity and permeability maps on the field of interest. The proposed methodology has been successfully applied to the initial development stage of an oil field in Australia.