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针对ZY油田的油藏高温高盐的特点,筛选出了空气泡沫驱的起泡剂配方,该体系在温度90℃、120℃条件时,矿化度达到25×104mg/L条件下老化2-3个月后,起泡体积仍可保持在(600~700)ml范围,有良好的稳泡性能;起泡体系与ZY原油的界面张力可达到10~(-2)mN/m,表明该起泡体系有一定的降低界面张力能力;室内填砂管物理模拟实验研究表明,与空气驱和表面活性剂驱相比,空气泡沫调驱体系可在水驱后更有效地提高采收率;微观驱油实验表明空气泡沫驱可通过抑制粘性指进,改变流体方向来提高驱油效率。
According to the characteristics of high temperature and high salinity in ZY oilfield, the foaming agent with air foam was screened. Under the conditions of 90 ℃ and 120 ℃, the salinity reached 25 × 104mg / L, After 3 months, the foaming volume can still be kept in the range of (600 ~ 700) ml, and the foaming system has good foam stability. The interfacial tension between foaming system and ZY crude oil can reach 10 ~ (-2) mN / m, The foaming system has a certain ability to reduce the interfacial tension. The physical simulation experiment of the filled pipe shows that compared with the air flooding and the surfactant flooding, the air foam flooding system can enhance the oil recovery more effectively after the water flooding. Microscopic flooding experiments show that air foam flooding can improve the flooding efficiency by inhibiting the viscous fingering and changing the fluid direction.