REAGENT COMPOSITION FOR DESTRUCTING CALCIUM CARBONATE DEPOSITION IN GAS BOREHOLES OF UNDERGROUND GAS STORAGE FACILITIES Russian patent published in 2021 - IPC C09K8/528 E21B43/27 

FIELD: gas industry.

SUBSTANCE: reagent composition for destructing calcium carbonate deposition in gas boreholes of underground gas storage facilities comprises hydrochloric acid, a surface-active agent – oxamine – and a salt of an alkali metal and organic sulphonic acid, a corrosion inhibitor – 1-hydroxyethyl-2-alkylimideazoline, water, as well as a complexing substance – oxyethylenediphosphonic acid, a water repellent agent – a salt of an alkali metal of a organosilicon compound, complex action components – formaldehyde and methanol, complex action components, essential acid stabiliser – acetic acid, an antifoaming agent – polymethylsiloxane, at the following ratio of components, % wt.: hydrochloric acid (relative to HCl) – 9.0 to 22.0, 1-hydroxyethyl-2-alkylimideazoline – 0.5 to 5.0, salt of an alkali metal and organic sulphonic acid – 0.1 to 1.2, oxyethylenediphosphonic acid – 0.05 to 0.2, formaldehyde – 0.3 to 4.0, methanol – 1.5 to 7.5, oxamine – 0.25 to 0.75, salt of an alkali metal of a organosilicon compound – 0.2 to 1.5, acetic acid – 2.2 to 9.0, polymethylsiloxane – 0.05 to 0.15, water the rest.

EFFECT: increase in the productivity of UGS gas boreholes due to the intensification of gas inflow.

1 cl, 3 tbl