METHOD FOR DEVELOPMENT OF OIL DEPOSIT WITH HIGH-TEMPERATURE BED Russian patent published in 1997 - IPC

FIELD: oil production industry. SUBSTANCE: oil is recovered through producing wells. Pumped through injection wells are working agent, sediment-creating material and solution of surface-active material. Injection wells are stopped and injected as sediment-creating material is solution of aluminium chloride and trisodium phosphate under pressure of injecting working agent. Solutions are mixed in well. Pressure-forcing into bed is effected by water solution of surface-active material under pressure which is 30-40% higher than working agent injecting pressure. Technological delay is during 1-10 days. Working agent is injected under pressure which is 50-60% higher than working agent injection pressure prior to treatment. Injection pressure is reduced to be 10-20% higher than pressure prior to treatment, and development of deposit is renewed. Solution of aluminium chloride is made of 20-40 g of aluminium chloride per 100 g of water. Solution of trisodium phosphate is made of 50-100 g of trisodium phosphate per 100 g of water. Relation of volumes of injected solutions of aluminium chloride and trisodium phosphate is (5-7):1 respectively. EFFECT: high efficiency. 2 cl