METHOD FOR PROCESSING BOREHOLES DURING PRODUCTION OF GAS FROM LOW-TEMPERATURE, LOW-PERMEABLE AND MUDDED FORMATIONS Russian patent published in 2022 - IPC E21B43/22 C09K8/58 C09K8/594 E21B43/16 

FIELD: gas industry.

SUBSTANCE: invention relates to the gas industry, in particular, to methods for processing bottomhole zones of boreholes for increasing the production rate of low-temperature, low-permeable, and clogged (mudded) formations. The method consists in consecutively injecting a hydrophilic agent - a 3 to 10 wt.% solution of magnesium chloride or a crystallohydrate thereof in methanol and a hydrophobic agent - a solution of the ABR hydrophobisator in a highly volatile hydrocarbon solvent, into the borehole. The agents are therein injected in the form of a liquid or a gas-liquid mixture formed during simultaneous injection of agents and a gas selected from the group of: nitrogen, methane, natural gas, flue gases, from the wellhead, and after the injection is complete, the agents are pushed into the formation.

EFFECT: increase in the efficiency of treatment of the borehole due to the destruction and prevention of formation of gas hydrates, reduction in the swelling of clay components of the rock, and facilitation of removal of condensation water from the downhole zone.

1 cl, 6 ex, 7 tbl