Method for modifying injectivity profile with ball sealers and chemical blocking agents

摘要

A method for modifying the injectivity profile of hydrocarbonaceous formations penetrated by at least one injection well and one production well which formation contains zones of varying permeabilities. Via this method, ball sealers are used to stop fluids from flowing through a zone of greater permeability while a zone of lesser permeability receives a temporary blocking agent. Thereafter, the ball sealers are removed and the zone of greater permeability is closed with a permanent blocking agent. Subsequently, the temporary blocking agent is removed and water flooding is reinstituted leading to improved oil recovery.