新型耐温抗高盐驱油泡沫体系的性能

针对复合稳泡剂泡沫体系(稳泡剂:HXYP+YPA,质量浓度分别为1 800 mg／L和200 mg／L;起泡剂: XN,质量浓度为2 000 mg／L),考察了NaCl与CaCl2混合盐、温度、原油对泡沫性能的影响;运用HAAKE流变仪,表、界面张力仪研究了泡沫体系的流变性、不同矿化度下的泡沫体系的表面张力以及泡沫体系降低原油界面张力的能力;对泡沫体系的长期热稳定性进行了测定;运用电镜扫描、并联填砂管研究了泡沫体系的微观结构以及油藏条件下的驱油效率。结果表明,泡沫体系具有优越的性能,在80℃、矿化度为0-20．3×104 mg／L的泡沫体系稳定,驱油效率显著。

RESEARCHING CAPABILITY OF NEW TEMPERATURE AND HIGH SALT-RESISTANCE FOAM SYSTEM

A foaming system with composite foam stabilizer Foam stabilizer: HXYP (ρ=1 800 mg/L) + YPA(ρ= 200 mg / L) ; Foamer : XN (ρ= 2 000 mg / L) ] was studied. Examining the foam capability affected byNaCl and CaCl2, temperature, oil, and investigating the rheological property of foam system used HAAKE rheometer; studing the foam system-oil interfacial tension in different salinity by u-sing hanging drop meter, mensurating the long-term thermal stability of high-salt foam system, researching the microstructure of foam systems by SEM and the oil displacement efficiency under the field conditions by using parallel sand filling tube. The result showed that the foam system had excellent characteristics and had a better oil displacement efficiency when temperature is 80℃and the sa-nility is 0 -20. 3×104 mg/L.