Two factors have seriously handicapped the presentation of this review. One is the lack of a thorough understanding of the nature of oil accumulation in the Berea sand and the other is the unavailability of sand data and production statistics within the field. Several cores have been taken but the results of their analysis have not been released. In the absence of such information this paper is confined to a historical review leading to the discovery well, the field development, and finally a limited discussion of the Berea sand.

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