Inventors:
Milton K. Abdo - Dallas TX
Alfred R. Jennings - Plano TX
Assignee:
Mobil Oil Corporation - New York NY
International Classification:
E21B 33138
Abstract:
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.