FIELD: petroleum industry.
SUBSTANCE: compound for enhanced oil recovery including non-ionogenic and anionic surface-active agents (NSAA and ASAA), bottom residues of butyl alcohols (BRBA), water-soluble polymer, and mineralized water contains neonol AF9-8 of AF9-12 as the NSAA, petroleum sulfonates synthesized based on the solvent extractions of oil distillates by N-methylpyrrolidone or phenol, polyacrylamide with m.m. of 1-16⋅106 g/mol and the degree of hydrolysis from 20 to 30% and mineralized water with mineralization of 0.6-142 g/l as the ASAA at the following component ratio, mass. %: the said petroleum sulfonates - 0.23-1.49, Neonol AF9-8 or AF9-12 - 0.13-2.29, BRBA - 0.25-0.84, the said polyacrylamide - 0.015-0.087, the said water - the rest.
EFFECT: increasing of efficiency of displacement of residual oil after water flooding.
3 tbl, 18 ex
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RU2467050C1 |
