METHOD OF DEVELOPING OIL DEPOSITS Russian patent published in 2016 - IPC E21B43/20 E21B43/22 E21B43/32 

FIELD: oil and gas industry.

SUBSTANCE: invention can be used in development of anticline deposits of oil of water-oil zones and terrigenous type. Method involves drilling of deposit with water-oil zones of system of production wells. Said wells in upper part of productive formation are perforated for product extraction. Development is carried out in deposits with an anticline structure presented by terrigenous type of reservoir, in pores of which there are fine clay particles and not less than 50 % of said particles relate to kaolinite clays. After flooding by more than 98 % of one or more wells of first row located closest to oil-water contact, modified water is injected, where modified water in which concentration of NaCl is not more than 5 g/l and its effect on reservoir reduces water relative permeability by at least 5 times. Pumping is performed for 3-10 days with rate of 0.1-0.8 of maximum intake of said wells. Thereafter, said wells of first row are stopped. In adjacent production wells of second row, upstream of structural marks, modified water is injected for 5-15 days with flow rate of not more than 0.1 of maximum intake of said wells. Then after 1-10 days production begins in wells of second row. Processes of pumping modified water are repeated consecutively in direction from minimum structural marks to maximum with flooding of corresponding wells.

EFFECT: increasing oil recovery of oil deposits.

1 cl, 2 ex, 1 dwg