FIELD: oil industry, more particularly use of reversible emulsions to various processes for oil production. SUBSTANCE: emulsifier of reversible water-oil emulsions comprises distillate cracking residue, heavy catalytic cracking gas oil which includes residual products of secondary oil refining and directly distilled diesel fraction which is primary oil refining product ratios of components being as follows, wt %: distillate cracking residue, 40-60; heavy catalytic cracking gas oil, 18; and directly distilled diesel fraction, 28-42. EFFECT: improved properties of reversible water-oil emulsions. 3 ex, 1 tbl
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