OIL DEPOSIT EXTRACTION METHOD Russian patent published in 2005 - IPC

FIELD: oil industry.

SUBSTANCE: method includes prior forcing of polyvalent metal salt solutions, water-soluble polymer, water suspension of dispersion mineral particles into watered bed, with forcing of each reagent by buffer water and displacing agent, into bed, watered by bed waters with mineralization above 250 g/l, said solutions are pumped with suspension, prepared on water with mineralization above 250 g/l, as polyvalent metal salt aluminum chloride or aluminum sulfate are used, or chlorine iron with 15-20% concentration, as buffer water and displacing agent - water with mineralization above 250 g/l, and welding agent is additionally injected into said suspension.

EFFECT: higher oil yield.

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