关键词: 起泡剂,    , 起泡能力,    , 稳泡性,   , 双管驱替

Abstract: The frother type, concentration, compressive strength, resistance to temperature, salt, antioil performance and high and low permeability double tube displacement for foam flooding on Hejian Dongying reservoir were studied. The results show that the best foam system screened out by the Waring Blender is W101 that the concentration of 0.1%; when a pressure of 0.1 MPa to 15 MPa, foaming and foam halflife volume increases as the pressure increases, but the pressure of 5 MPa or higher, the pressure on play a little influence on foaming ability and stability of foam; with the increase of temperature, the foaming ability of the frother solution of W101 first increases then decreases, and foam stability of it decreases gradually; when the salinity was 2 500 mg/L to 10 000 mg/L, with increasing salinity, the frother W101 of the foaming ability gradually decreases, foam stability decreased first and then increased slightly; the greater oil ratio of the frother W101, foaming ability and foam stability is poorer. High and low permeability double tube displacement experiments show that foam can effectively plugging high permeability tube, enlarge the swept volume of low permeability tube, the inlet pressure force from the water flooding of 0.3 MPa litre to air bubbles flooding of 1.8 MPa, low permeability tube to improve oil recovery 16.89%, hypertonic tube to improve recovery efficiency 9.30%, comprehensive recovery increased by 12.3%. 

Key words: Foaming agent,    ,  Foaming ability,    , Foam stability,    ,  Double tube displacement