COMPOUND FOR ACID TREATMENT OF BOTTOM-HOLE ZONES OF INJECTION AND PRODUCING WELLS Russian patent published in 1998 - IPC

FIELD: oil production industry. SUBSTANCE: compound for acid treatment has following components: surface-active matter 0.5-5.0 mass%, cationic hydrophobic agent - quaternary ammonium compound of formula [R₁R₂R₃N⁺CH₂C₆H₅]•Cl^-, where R₁ = alkyl C₈ - C₁₈;; R₂= CH₃; C₂H₅; C₃H₇; R₃=CH₃; C₂H₅; C₃H₇ - 0.5-1.0 mass% and muriatic acid with concentration of 12-24 mass% - 94.0-99.0 mass%. Application of aforesaid compound ensures reduction of speed of reacting acid compound with ground, removing from down-hole zone of bed of plugging components (such as metal oxides, loose-cohesive water and water-oil emulsion, increasing ability of compound in enlarging oil inflow towards producing wells, also increasing injectivity of producing and injection wells. EFFECT: higher efficiency. 1 tbl