METHOD OF OIL FIELD PART DEVELOPMENT AT THE LATE STAGE OF OPERATION OF OIL AND GAS FIELD Russian patent published in 2018 - IPC E21B43/22 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil production and can be used to develop a section of the oil deposit at the late stage of operation of the oil and gas field. In the method for developing a section of an oil reservoir by waterflooding, which includes injecting into the formation through an injection well a gel-forming composition-GOS and a drilling fluid in a cyclic mode, cyclic injection of GOS with a drilling fluid into the formation until the final pressure on the wellhead is increased by 0.5–2.0 MPa below the reservoir pressure, then, after holding the well for gelation, an oil-water emulsion with an organic dispersed phase content of 0.1–0.5 % is pumped to a pressure of 0.5–2.0 MPa above the formation pressure.

EFFECT: ensuring enhanced oil recovery, selective oil displacement, visual control capabilities.

1 cl, 3 ex