Reservoir characterization plays a significant role in economic success of the reservoir management. Nearly all reservoirs show some degree of heterogeneity which invariably impacts production. As a result, the production performance of a complex reservoir cannot be realistically predicted without accurate reservoir characterization. Reservoir characterization is a complex problem which requires integration and interpretation of various geological and engineering information.

A systematic and synergistic approach has been employed in this study for characterization of an oil reservoir in West Virginia. Stratigraphy, structural, and seismic data have been utilized to develop a model of the reservoir. Significant amount of reservoir data were collected, compiled and analyzed. Innovative approaches were employed to integrated and reconcile thin-section and scanning-electron microscopy results, petrographic data, initial production data, core analysis, pressure transient tests, and well log interpretation results to quantify model parameters. Primary and secondary production data have been utilized to evaluate and modify the model and its attributes. The results indicated the existence of major heterogeneities in the reservoir which have had profound impact on the performance of the reservoir.

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