METHOD OF DEVELOPMENT OF FLOODED OIL POOL Russian patent published in 1999 - IPC

FIELD: oil- producing industry. SUBSTANCE: method includes withdrawal of fluid from producing wells, organization of sedimentation inside formation due to injection of reagent based on alkali into injection wells. In so doing, injected, first, into injection well is sediment- forming agent based on alkali, and then, one of producing wells found in the center of pool is subjected to vibroseismic treatment when average water encroachment of producing wells nearest to injection wells reduced by 3- 5% due to injection of sediment-forming reagent. EFFECT: reduced water phase permeability, increased oil phase permeability and rate of gravity separation of phases by a factor of 100 resulting in extended sweep of formation with flooding and in raised displacement factor. 1 cl