METHOD FOR INCREASED OIL EXTRACTION FROM STRATA Russian patent published in 1996 - IPC

FIELD: oil production. SUBSTANCE: oil treatment unit is used to prepare gas, steam, and water. This is additionally equipped with waste-heat boiler to burn low-grade petroleum products. Flue gases and steam produced in the boiler are mixed and obtained steam/gas is pumped in the stratum. Waste waters are mixed in hot water extracted from water removal system of oil treatment unit followed by pumping in the stratum to maintain pressure and displace steam/gas and oil. Oil coke, hydrocarbon gas and cracking-residue are used as low grade petroleum products. EFFECT: increased oil production. 2 cl