To better define reservoir heterogeneity at the Liuhua 11-1 Field, an ultrahigh-resolution 3-D seismic survey was acquired in July 1997. The seismic data were first converted to acoustic impedance by using geologically constrained inversion techniques and then to porosity based on a linear impedance versus porosity relationship. Petrophysical data and modeling were combined with the seismic inversion. Fractures, faults, and solution-collapse phenomena were analyzed. The obtained information was used to build reservoir characterization and simulation models, that were tuned and validated using history matching, to predict future reservoir performance.