The objective of the project is to examine how seismic and geologic data can be used to improve characterization of small-scale heterogeneity and their parameterization in reservoir models. The study is performed at West Coalinga Field in California. We are currently in the process of determining the limits of current state-of-the-art interpretation methods for poststack seismic data. We developed and applied three-dimensional seismic attributes which estimate the statistics of seismic heterogeneity. We just formulated an algorithm to infer parameters of object-based reservoir models from seismic data, and now, we are testing the method with synthetic reservoir data. Lastly, we built models of reservoir heterogeneity for two focus areas in Coalinga held using plentiful wireline data.