Because of the unconfined nature of a steamflood pilot, its results cannot be extrapolated directly to a fieldwide project. Careful analyses of the pilot performance with consideration for fluid migration across the pilot boundary are needed for design and implementation of a successful fieldwide project. Large-scale simulation models that include both the pilot and surrounding patterns should be used for history matching the pilot performance, and the history-matched models used for design and implementation of a fieldwide project. As an approximation, a weighted average of confined and unconfined patterns in a project area as predicted from simulation or observed in the field can be used for designing a fieldwide project.

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