METHOD OF OIL DEPOSIT DEVELOPMENT Russian patent published in 2009 - IPC E21B43/22 

FIELD: oil and gas industry.

SUBSTANCE: invention refers to oil and gas industry, particularly to methods of development of non-uniform oil reservoir. According to the method of oil deposit development biological surface active substance - bioSAS "КШАС-М" and liquid glass are pumped simultaneously, then they are forced through with a fringe of fresh water, then solution of lignosulphonate and water solution of salts of multivalent metals are pumped together, in case of presence of reservoir water of calcium-chloride type with combined contents of salts above 200 g/l water solution of salts of multivalent metals is not pumped.

EFFECT: increased efficiency of oil deposit development under conditions of reservoirs with non-uniform permeability at the late stage of reservoir development under conditions of low mineralisation of reservoir waters.

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