油相对泡沫稳定性的影响规律  

Relationship between oil and foam stability

作　　者：元福卿[1,2] 王其伟[2] 李宗阳[2] 姬奥林[2] 赵方剑[2] 夏曦冉 

机构地区：[1]中国石油大学(华东)石油工程学院,山东青岛266580 [2]中国石化胜利油田分公司地质科学研究院,山东东营257015

出　　处：《油气地质与采收率》2015年第1期118-121,共4页Petroleum Geology and Recovery Efficiency

基　　金：国家科技重大专项"胜利油田特高含水期提高采收率技术"(2011ZX05011)

摘　　要：油相的存在会导致泡沫的稳定性变差,从而影响泡沫驱的效果,如何提高泡沫的稳定性,指导泡沫体系设计成为泡沫驱提高采收率中亟待解决的难题。为探索油相对泡沫稳定性的影响规律,采用泡沫衰减法和微流控制法研究了界面张力和油相对泡沫体系稳定性的影响,并评价了乳化油滴和气泡间的相互作用。通过固定油相,改变泡沫体系,研究油相与泡沫体系之间界面张力对泡沫稳定性的影响,结果表明,油水界面张力越低的泡沫体系所形成的泡沫半衰期越短,油相对泡沫的稳定性影响越大。采用同一泡沫体系,改变油相,不同油相对泡沫稳定性影响结果表明,表面张力越低的油相对泡沫体系的稳定性影响越大,泡沫稳定性越差。这是由于油相相对分子质量越大、表面张力越大,越不易在气水界面铺展,与泡沫的相互作用也越弱。As the performance of foam flooding is dominated by foam stability which may be reduced in the presence of oil,development of foam system with improved foam stability has become increasingly important in the area of enhancing oil recovery of the foam flooding. The relationship between oil and foam stability was investigated by foam decay measurements and microfluidic control method. The effect of interfacial tension(IFT)between oil and foam system on the foam stability was examined through certain oil and different foam systems. Reaction between emulsified oil drop and bubbles was evaluated. Experimental results show that the half-life decreased considerably for the low-IFT foam systems,and oil has greater influence on the lower-IFT foam systems. Additionally,oil with lower surface tension would affect foam ability more significantly. Because larger relative molecular weight of oil and surface tension will bring difficulties in spreading on the gas-water interface with weaker reaction of the foam.oilfoamfoam stabilitysurface tensioninterfacial tensionhalf-life

关 键 词：油相 泡沫 泡沫稳定性 表面张力 界面张力 半衰期 

分 类 号：TE357.42[石油与天然气工程—油气田开发工程]