We can define five measurable properties from surface seismic. Reflection time and continuity give structure and compartmentation information. The third, compressional rock velocity, comes from seismic velocity analysis . The fourth, acoustic impedance, is measured from reflection amplitudes and the fifth, Poisson's ratio, from seismic amplitude variation with offset (AVO) analysis. Petrophysical analysis relates these seismic properties to rock properties such as lithology, fluid content, porosity, net pay and permeability in the reservoir, and is used to predict lateral variations in rock properties. To predict and map reservoir properties from seismic data requires high quality, properly processed and interpreted seismic, core and well log data. Integration of all these data and close co-operation between all disciplines are the keys to success.

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