Comprehensive onshore and limited offshore application databases of EOR (Enhanced Oil Recovery) processes were analyzed; and successful offshore applications were incorporated into the new EOR screening criteria. Water-Alternating-Gas (WAG), hydrocarbon miscible, polymer, immiscible gas, and carbon dioxide (CO2) miscible processes can be successfully implemented in offshore fields and the screening criteria for each of these processes are discussed in this paper. With the rapidly increasing, current interests in applying EOR to huge remaining reserves in offshore fields, the refined screening criteria should be useful for the initial EOR feasibility studies.

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