The objective is to develop methods to exploit viscoelastic rock and fluid properties to greatly enhance the sensitivity of surface seismic measurements to the presence of hydrocarbon saturation. Researchers plan to use well log, lithology, production, and 3-D seismic data from an oil reservoir in north central Texas. The proposed program provides a methodology for processing and interpreting surface/subsurface data to determine reservoir properties and for applying the information to predict hydrocarbon locations and volume estimates in complex geological environments.