COMPOSITIONS FOR OIL FORMATION TREATMENT (VERSIONS) Russian patent published in 2003 - IPC

FIELD: oil producing industry; applicable in treatment of bottomhole formation zone for increase of pool coverage by stimulation, alignment of displacement front and complete withdrawal of residual oil from formation by washing. SUBSTANCE: composition according to the first version contains, wt. %: carboxymethylated oxyethylated isononylphenols based on propylene trimers with 10-12 degree of oxyethylation 7.0-25.0; oil alkylaryl sulfonates 5.0-30.0; the balance, polyglycols. According to the second version, composition contains, wt. %: carboxymethylated oxyethylated isononylphenols based on propylene trimers with 10-12 degree of oxyethylation 0.35-2.5; oil alkylarylsulfonates 0.25-3.0; finely dispersed clay 0.0025-2.5; polyglycols 4.0-9.0; the balance, water. Technical result of invention consists in higher efficiency of oil formation treatment to recover permeability of bottomhole formation zone, increase of pool coverage by stimulation, alignment of displacement front and complete withdrawal of residual oil by washing including that under conditions of high temperature of formation (40-80C), reduced labor inputs and consumption of solvent in use of compositions for oil formation treatment. EFFECT: higher efficiency of use. 2 cl, 3 tbl, 2 ex