METHOD FOR INCREASING OIL RECOVERY OF KEROGEN-COMPRISING SHALE FORMATIONS Russian patent published in 2023 - IPC E21B43/24 E21B43/30 

FIELD: hydrocarbon production.

SUBSTANCE: hydrocarbon production from low-permeability kerogen-comprising deposits. Method for developing kerogen-saturated low-permeability reservoirs of hydrocarbon deposits includes the following steps: drilling at least two horizontal wells parallel in the horizontal plane or at least two directional wells parallel to the inclined drilling plane; thermal insulation of the vertical section of wells; conducting at least ten stages of hydraulic fracturing on the wells towards each other to create an extensive network of microfractures and interference in the formation between the wells; injection of the coolant heated to a temperature of 400-800°C at the wellhead along the wellbore of the injection well into kerogen-comprising formations, creating a temperature in the formation of at least 325°C, necessary for the implementation of the generation of synthetic oil in the reservoir due to heating and activation of the process of hydropyrolysis of kerogen covered by the coolant; extraction through the production well of a hot fluid comprising a mixture of coolant, oil and liquid hydrocarbons synthesized in the formation, formed when the coolant moves along the formed branched network of microcracks, in the direction from the injection to the production well.

EFFECT: increased oil recovery.

7 cl, 5 dwg