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The Brugge benchmark case designed for the SPE Applied Technology Workshop (ATW) held in Brugge in June 2008 has proven to be valuable for testing and comparing methods of history matching, production optimization and closed-loop optimization by its extensive use in literature. Key features that contributed to its usefulness for history matching included the relatively large size of the problem, the large amounts of data and the complexity of the fine scale truth model, which gave rise to realistic upscaling issues. For optimization, the usefulness of the Brugge field case derives from the complexity and uncertainty in the reservoir model, the number of control settings to be optimized, and the number of constraints on the control variables. As a closed-loop optimization exercise, the primary weakness of the Brugge benchmark was the low frequency of the feedback loop. In terms of optimization, the Brugge case …