EXCAVATION METHOD OF MULTILAYER OIL RESERVOIR WITH LAYERS OF DIFFERENT PENETRATION Russian patent published in 2008 - IPC E21B43/22 

FIELD: oil industry.

SUBSTANCE: at later stage of oil reservoir exploitation after high penetrating layers isolation repressuring bank medium of micellar solution, buffer liquid and additionally strained Cenomanian water are consistenly injected through intake well in less penetrating layers in cycle operation, micellar solution of mass.%: syntanol-ALM-10 - 0.5-22.0, polyalkylbenzol pitch with m.m. 120-220 - 4.0-31.0, strained Cenomanian water is the rest, buffer liquid contains polyacrylamid composition - 0.005-0.05% of water volume in it, bulk volume of bank micellar solution - 8.0-10.0%, buffer liquid 20.0-30.0% of void volume of the second layers group.

EFFECT: exploitation effectiveness improvement and productive rate of low penetrating layers group.

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