The reduction process of selective and controlled the relative permeability to water in oil of high permeability formations

摘要

"The process of reduction and selective control of relative permeability to water in oil formations with high permeability. It is described a process for selective and controlled reduction of relative permeability to water in oil formations with high permeability, with almost no reduction of the permeability to oil.The process comprises, for rocks, sandstone reservoirs, a first layer of a cationic polymer, followed by the Bank of brine spacer and a second polymer layer consisting of a suspension of anionic polymer and a microgel anionic or non ionic, optionally this Co. Nfigurau00e7u00e3o being repeated, considerably increases the thickness of the layers.In order to allow for the use of the process for high permeabilities. For the carbonate rocks the first layer of polymer is anionic, and second, a suspension of cationic polymer / microgel cation ionic or not.