METHOD FOR INCREASING OIL YIELD OF OIL DEPOSIT Russian patent published in 2005 - IPC

FIELD: oil industry.

SUBSTANCE: method includes serial pumping through force well of solutions based on polysaccharide, as solutions on basis of polysaccharide water or water-spirits solution of galaktomannan are forces, additionally containing cellulose ether or polyacrylamide and surfactant, and then water or water-spirit solution of galaktomannan is forced, additionally containing surfactant. Said water of water-spirits solutions of galaktomannan may additionally contain modified sodium benzoate and/or potassium sorbate. Prior to pumping of water or water-spirits solutions of galaktomannan components thereof are mixed in mixer. After pumping of water or water-spirits solutions of galaktomannan oil is forced out by forcing agent.

EFFECT: higher efficiency.

4 cl, 6 ex, 1 tbl