| 摘要 |
FIELD: oil production industry, particularly acid terrigenous reservoir treatment and clay removal from well bottom zone. ^ SUBSTANCE: dry acid composition comprises ammonium fluoride or ammonium bifluoride or ammonium fluoride-bifluoride, sulfanic acid, phosphor-containing complexing agent, namely phosphonic acid derivative and salmiac taken in the following amounts in aqueous dry acid solution (% by weight): ammonium fluoride - 0.56-18.5, ammonium bifluoride - 0.43-14.25, ammonium fluoride-bifluoride - 0.51-17.00, sulfanic acid in equimolecular ratio, above phosphor-containing complexing agent - 0.01-2.0, salmiac - 0.1-3.0, remainder is water. ^ EFFECT: increased thermal stability of dry acid composition, prevention of composition sludging after mixing thereof with mineralized water and reduced corrosion activity. ^ 7 tbl |
