二元复合低界面张力泡沫驱油体系研究  

The research of binary complex foam flooding system with low interfacial tension

作　　者：黄春霞 汤瑞佳 余华贵 江绍静 

机构地区：[1]陕西延长石油(集团)有限责任公司研究院,陕西西安710075

出　　处：《应用化工》2015年第3期498-501,505,共5页Applied Chemical Industry

基　　金：陕西延长石油(集团)有限责任公司科研项目(ycsy2010-ky-A-12)

摘　　要：通过评价不同起泡剂在无油和含油30％条件下的泡沫高度、半衰期和泡沫综合指数，筛选出了起泡和稳泡性能良好的起泡剂FC-2和TC-12。加入能够降低界面张力的表面活性剂BS和稳泡剂HPAM，优化得到了二元复合低界面张力泡沫体系：0.12％FC-2＋0.08％TC-12＋0.1％BS＋1500 mg/L HPAM。该泡沫体系具有很好的配伍性和耐油性；当含油30％、气液比3：1时，具有良好的起泡和稳泡性能；油水界面张力达到38.3×10-3 mN/m；双管并联岩心实验结果显示，水驱后，泡沫注入量越大（0.1～0.4PV），高渗岩心对应低渗岩心的采收率越高；渗透率级差越大，对应的低渗岩心的采收率则越低。说明该泡沫体系具有一定的封堵和调剖作用，能够调整流量分配，提高波及体积，从而改善驱油效果。The foaming agents FC-2 and TC-12 with excellent foaming properties and stability were selected by evaluating the height,half-life and composite index of the foam under the conditions of without oil and oil content of 30%. Adding a surfactant BS and polymer HPAM,it was optimized and obtained the low interfacial tension of binary complex foam system： 0. 12% FC-2 ＋ 0. 08% TC-12 ＋ 0. 1% BS ＋1 500 mg / L HPAM. The system has good compatibility and oil resistance; When the oil content of 30%,the gas-liquid ratio of 3 ∶ 1,with excellent ability of foaming and stability; interfacial tension of oil-water was 38. 3 × 10- 3mN / m; the results of parallel twin-tube core flooding show that： after water flooding,the greater the amount of foam（ 0. 1 ～ 0. 4PV） injected,the higher the recovery of oil in low permeability core; the greater the permeability ratio,the less the recovery of oil in low permeability core. The foam system has a role in plugging and profile for a certain heterogeneity reservoir. It can increase the swept volume of displacing agents,thereby enhancing oil recovery.

关 键 词：泡沫驱 表面活性剂 二元复合 泡沫综合指数 提高采收率 

分 类 号：TQ423.94[化学工程] TE357.46[石油与天然气工程—油气田开发工程]