USE OF GASES AND LIQUIDS FOR EXTRACTING HYDROCARBONS CONTAINING NANOPARTICLES FOR INCREASING HYDROCARBON EXTRACTION Russian patent published in 2021 - IPC E21B43/22 E21B43/26 C09K8/594 C09K8/66 

FIELD: hydrocarbon extraction.

SUBSTANCE: invention relates to methods for increasing hydrocarbon extraction using gases, such as carbon dioxide, nitrogen, natural gas, liquified natural gas, liquified carbon dioxide and/or a mixture thereof in a combination with functionalized materials, such as nanoparticles or nanoparticle mixtures. A method for stimulating hydrocarbon extraction includes (a) introduction of gas, liquified gas or evaporated liquified gas into an underground formation containing hydrocarbons; (b) providing gas with the possibility of absorption with the specified hydrocarbons; (c) extraction of the specified hydrocarbons containing the specified gas, liquified gas or evaporated liquefied gas absorbed with them. A portion of liquid for hydrocarbon extraction containing surface-functionalized nanoparticles is introduced into the underground formation containing hydrocarbons before or after removal of gas, liquified gas or evaporated liquified gas.

EFFECT: increase in the hydrocarbon extraction.

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