B20 EOR Methods to Enhance Gas Oil Gravity Drainage - Modeling Aspects M.L. Verlaan (Shell International Exploration & Production) P.M. Boerrigter* (Shell International Exploration & Production) & D. Yang (Shell Canada Energy) SUMMARY Conventional displacement methods such as water flooding do not work effectively in densely fractured reservoirs: due to the high fracture permeability it is not possible to establish significant pressure differentials across oil bearing matrix blocks to drive oil from matrix rock towards producers. In such reservoirs one has to rely on natural mechanisms like capillary imbibition or gravity to recover oil from the matrix reservoir rock. In


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