Combined Stochastic and Deterministic Reservoir Characterization Leads to Faster History Matching of a Horizontal Well in a Complex Fluvio-Lacustrine Environment

An example of how to treat a complex fluvio-lacustrine reservoir, characterized by both continuous and discontinuous multi-scaled heterogeneities is presented. A detailed geological description was prepared, the heterogeneities were described and quantified, and discriminated in correlatable or discontinuous levels. The discontinuous levels were geostatistically modeled and up-scaled, while the correlatable ones were deterministically represented. The history matching process was very rapid, allowing greater time and confidence in sensitivity studies. The whole study is clearly a multidisciplinary project, involving geology, geostatistics, up-scaling and simulation.