COMPOSITION FOR PREVENTING INORGANIC SALT DEPOSITS WHEN EXTRACTING OIL AND GAS FROM WELLS Russian patent published in 2012 - IPC C09K8/74 

FIELD: chemistry.

SUBSTANCE: invention relates to oil and gas industry. The composition for preventing inorganic salt deposits when extracting oil and gas from wells in carbonate and terrigenous formations contains water, a mother solution - wastes from production of monochloroacetic acid which is aminated with ammonia water, containing the following, wt %: ammonium chloride 4-9, sodium chloride 10-15, sodium salt of nitrilotriacetic acid 6-14, sodium acetate 5-12, sodium glycolate 4-6, sodium oxalate 5.5-8 and water - the rest, hydrochloric acid - wastes from organofluorine production, containing up to 25-30 wt % hydrogen chloride and up to 4-6 wt % hydrogen fluoride, with the following ratio of components, wt %: said hydrochloric acid 12-15, said aminated mother solution from production of monochloroacetic acid 14-16, water - the rest.

EFFECT: high formation productivity by preventing formation of inorganic deposits when processing carbonate and terrigenous producing formations, which prevents contamination of the formation and downhole equipment with insoluble salts and gel-like iron compounds, which reduces formation productivity, as well as recycling the mother solution - wastes from production of monochloroacetic acid and avoiding the use of scarce, expensive reagents.

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