METHOD FOR INTENSIFICATION OF EXTRACTION OF GASEOUS HYDROCARBONS FROM NONCONVENTIONAL LOW-PERMEABLE GAS-BEARING FORMATIONS OF SHALE PLAYS/FORMATIONS AND A TECHNOLOGICAL COMPLEX FOR ITS IMPLEMENTATION Russian patent published in 2019 - IPC E21B43/247 E21B43/267 E21B43/27 E21B43/22 

FIELD: oil and gas industry.

SUBSTANCE: group of inventions relates to oil and gas industry and can be used for intensification of extraction of shale gas from formations of gas-bearing shale plays/formations without multi-stage hydraulic fracturing of formation or carbon-dioxide formation rupture. Method involves preparation of working agents of action, their injection along product conduits into gas-bearing formation of shale plays/formations to perform thermobarochemical and thermochemical effects on the formation to increase production of shale gas with subsequent extraction of shale gas and its delivery to the day surface of the well along the product pipeline. Before the first thermochemical impact on the productive formation, the first thermobarochemical exposure is carried out, and after the first thermochemical impact on the producing formation and formation of a large-diameter horizontal well (LDHW), having high permeability for shale gas, as well as after selection of shale gas from zones of formation with radius of less than 50 meters, shale gas is extracted from formation zone, radius of more than 50 meters without any effect on this remote from well zone of formation. At that, to maintain a high level of shale gas production from the zone of the formation removed from the well with a radius of more than 50 meters, periodical second thermobarochemical and second thermochemical effects are applied to the formation zones within a radius of less than 50 meters from the well shaft.

EFFECT: high degree of extraction of shale gas from formations of shale adhesives due to involvement in active development adsorbed in formations of gas-bearing shale plays/formations of shale gas, intensification of its extraction.

6 cl, 5 dwg, 4 tbl