METHOD FOR DEVELOPMENT OF HIGH-WATER-CUT OIL DEPOSIT Russian patent published in 2024 - IPC E21B43/20 

FIELD: oil industry.

SUBSTANCE: invention relates to the oil industry, namely to methods of waterflooding during development of oil deposits by pumping water into a productive oil formation through injection wells. Method for development of high-water-cut oil deposit involves sampling fluid from a production well and obtaining water-oil mixtures with the same value of water cut and different values of mineralization by separating the fluid sample into oil and water by centrifugation with subsequent mixing of separated water with distilled water in different proportions and reverse connection of water obtained in this way with separated oil. At that, values of aggregative stability of obtained water-oil mixtures are determined, ranges of mineralization are identified, in which values of aggregative stability are lower than average value of aggregative stability of water-oil mixtures, which is determined by maximum and minimum values of aggregative stability. After that, water with mineralization value from selected mineralization ranges is pumped through the injection well.

EFFECT: enabling increase in the oil recovery factor from high-water-cut oil deposits at a later stage of development when pumping low-mineralized water, as well as prolonging the service life.

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