METHOD OF INCREASING OIL PRODUCTION AND REDUCTION OF WATER CUTTING OF PRODUCTION Russian patent published in 2008 - IPC E21B43/22 E21B43/32 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to methods of increasing oil production and reducing water cutting of production. According to the method water with initial ionic force of 0.0004-0.0008 mole/l is activated in a cathode zone of diaphragm electrolytic cell chamber during 0.5-3 hrs at imposition onto water of electric field of E=(1000-15000) V/m strength. Powder of silica sand, or glauconite, or a rank of alumina silicates: zeolite or amphoteric materials: bentonite, montmorillonite, nontronite, kaoline (anauxite), talk, pyrophyllite, each separately or in random mixture are introduced into activated water at weight ratio to water 5-25%. Produced dispersive mixture is passed through the cathode zone of the electrolytic cell at strength of electric field E=(1000-15000) V/m at a rate of 1-10 m³/hour during one hour, thus obtaining activated dispersive system which further is pumped into horizon in volume of 5-100 m³. After that fresh water is pumped into the horizon as a buffer at volume of 1-20 and 3-80 m³ of horizon water as driving under pressure of 60-90 atm at during 3-5 hours.

EFFECT: increased yield of oil from layer-by layer non uniform horizons, reduced volume of pumped off produced mineralised water, reduced ecological danger of fresh water mineralisation in open water reservoirs, bogging of soil and formation of alkaline lands on it.

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