METHOD FOR MULTIZONE OIL RESERVOIR DEVELOPMENT Russian patent published in 2008 - IPC E21B43/20 

FIELD: oil production, particularly enhanced recovery methods for obtaining hydrocarbons.

SUBSTANCE: method to produce oil from oil field including high-permeable and low-permeable reservoirs having different wettability involves dividing reservoirs into two groups having different reservoir porosity and permeability characteristics; choosing the first reservoir group having higher permeability and the second group having lesser permeability; injecting working agent through injection wells and producing oil from reservoirs through production wells. Production object having hydrophobic rock surface is selected from the second reservoir group having lesser permeability. Micellar solution plugs are injected in said production object. Micellar solution plugs are serially displaced with buffer liquid plugs and with previously purified bottom and Cenomanian water plugs. Purified bottom and Cenomanian water is injected in the first reservoir group including reservoirs with higher permeability along with micellar solution injection and serial buffer solution plug. Oil is produced simultaneously from reservoirs of all groups.

EFFECT: increased technological and economical efficiency, possibility to take into consideration oil recovery from each reservoir.

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