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

摘要： 对河间东营油藏泡沫驱油的起泡剂类型、质量分数、抗压、抗温、抗盐、抗油等性能和高低渗双管驱替进行了研究。结果表明,WaringBlender法筛选出的最佳泡沫体系为质量分数0.1%的W灢101;当压力为0.1~15MPa时,起泡体积和泡沫半衰期都随着压力的增高而增加,但压力超过5MPa时,压力对W灢101起泡剂溶液的起泡能力和稳泡性影响不大;随着温度的升高,W灢101起泡剂溶液的起泡能力先增大后减小,稳泡性逐渐减小;当矿化度为2500~10000mg/L时,随着矿化度的增加,起泡剂W灢101的起泡能力逐渐减小,稳泡性先降低后小幅增大;剂油体积比越大,起泡剂W灢101的起泡能力和稳泡性能越差。高低渗双管驱替实验表明,泡沫能有效封堵高渗管,扩大低渗管的波及体积,入口压力从水驱结束时的0.3 MPa升至空气泡沫驱结束时的1.8 MPa,低渗管采收率提高 16.89%,高渗管采收率提高9.30%,综合采收率提高12.3%。

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