METHOD FOR INCREASING EFFICIENCY OF HYDROCARBON PRODUCTION FROM OIL-KEROGEN-CONTAINING FORMATIONS AND TECHNOLOGICAL COMPLEX FOR ITS IMPLEMENTATION Russian patent published in 2020 - IPC E21B43/247 E21B43/18 

FIELD: oil and gas industry.

SUBSTANCE: group of inventions relates to oil and gas industry and can be used to increase efficiency of hydrocarbon production from petroleum-hydrogen containing formations of shale formations without using hydraulic fracturing of formation, as well as for extraction of natural bitumen, heavy and high-viscosity oil. High-tech oil production method includes thermochemical effects on productive stratum with working agents. They are prepared on the day surface and injected in the specified sequence into the near-borehole zone of the productive formation along the column of heat-insulated tubing string. Then high-tech oil is extracted from productive formation in well flowing mode and delivered to day surface along column of heat-insulated tubing string. Extraction process is carried out cyclically. Each cycle includes several stages. First stage of each cycle is the stage of injection into productive stratum of working agent of action. At the last stage high-tech oil is withdrawn from productive formation. At the stage of oil extraction of each cycle in-situ pressure is controlled. As soon as this pressure drops to preset value, selection is stopped.

EFFECT: increased oil recovery of petroleum-hydrogen-containing formations due to formation of their high permeability.

2 cl, 4 dwg, 1 tbl