OIL DEPOSIT DEVELOPMENT METHOD Russian patent published in 2024 - IPC E21B43/20 

FIELD: oil industry.

SUBSTANCE: invention relates to the oil industry and can be used in the development of an oil deposit. Oil deposit development method involves drilling of vertical production and injection wells, injection of displacement agent into injection wells and production of products from production wells. During operation of wells, oil and water production and injection volumes are measured, the degree of water cut of the extracted product is controlled, the geological structure of the inhomogeneous oil formation, reservoir properties by its area and section are specified. Obtained results are compared with the geological and hydrodynamic modelling data taking into account the current development conditions. In order to increase the degree of displacement and the area of drainage by the area and section, according to the results of the obtained studies in the zone of distribution of the reservoir between the first and second row of production wells from the well of the first row which has been flooded to 76% and more, which has been transferred to injection, two horizontal offshoots are drilled in the direction of the second row of production wells. At the same time each horizontal offshoot is made at 1 m from the bottom of the productive formation and with length 4 of the horizontal part of not more than 100 m. Further, injection is carried out in cyclic mode at injection into vertical well for 5 days, wherein the horizontal offshoot is idle, then at injection into the horizontal offshoot – for 7 days, the vertical well is idle.

EFFECT: increasing oil recovery from oil deposits and increasing well productivity.

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