METHOD FOR INCREASING EFFICIENCY OF EXTRACTING HIGH-TECHNOLOGY OIL FROM PETROLEUM-CARBON-BEARING FORMATIONS AND TECHNOLOGICAL COMPLEX FOR IMPLEMENTATION THEREOF Russian patent published in 2020 - IPC E21B43/247 E21B43/18 

FIELD: oil, gas and coke-chemical industries.

SUBSTANCE: group of inventions relates to oil and gas industry and can be used for extraction of high-technology oil from petrogen-containing formations of shale formations without using hydraulic fracturing of the formation, as well as for extraction of natural bitumen, heavy and high-viscous oil. Method includes thermochemical effects on productive formation by working agents prepared on day surface and injected in a given sequence into near-borehole zone of productive formation along column of heat-insulated tubing string with subsequent extraction of hydrocarbons from it in well flowing mode. Extraction process is performed cyclically. Each cycle includes several stages. First stage of each cycle is the stage of injection into productive stratum of working agent of action for increase of permeability of well-borehole zone of productive formation, and last - extraction of hydrocarbons from productive formation. At the hydrocarbons extraction stage of each cycle in-situ pressure is controlled. As soon as it drops to preset value, which is higher than hydrostatic pressure, selection is stopped. Technological complex is equipped with a unit for preparation of working agents of action, a reservoir for storage and distribution of prepared water, as well as a reservoir for storage and dispensing of prepared working agents of action. Storage tanks for components intended for preparing working agents of agents are hydrogen peroxide storage tanks for storage of water saturated with a catalyst in form of iron ions, for storage of water saturated with hydrogen inhibitor, for storage of organic solvents, for storage of spirits. Reservoir for storage and dispensing of treated water is connected by the input to the output of the water treatment plant, and by the outlet - to the input of the generator. Its output is connected to input of working agent preparation unit, to inputs of which are also connected the above containers for components of working agents of action. Output of the working agent preparation unit is connected to the inlet of the reservoir for storage and dispensing of the prepared working agents of the action, the output of which is able to be connected to the tubing string. In this column there is a compensator for thermobaric changes in the length of the tubing string. It has possibility of tight contact with inner surface of casing pipe for separation of well into two sealed from each other volume - above-packer and under packer.

EFFECT: technical result is increasing oil recovery of formations due to formation in a well-spring zone of high-permeability retort with increase in its volume as oil is withdrawn.

2 cl, 1 tbl, 4 dwg