摘要
本文研究了界面张力对相对渗透率曲线的影响。为此进行了一系列非稳态驱替实验。实验是采用非胶结岩心和不同界面张力的流体体系进行的。 流体体系中,被驱动相采用的是模拟原油,驱动相分别是:地层水、表面活性剂溶液、下相微乳液和中相微孔液。研究结果表明:①界面张力对相对渗透率曲线有实质性影响。随着界面张力的降低,驱替相和被驱替相的相对渗透率曲线均升高。特别是在界面张力σ<10^(-2)mN/m时此影响更明显。②随着界面张力的降低原油采收率有明显的提高。
<ABSTRACT>: Chemical flooding requires relative permeability data to do re-servoir mithematical simulation, unsteady-state displacement experiments were conducted. In the experiments unconsolidated cores and different interfacial tension ( IFT ) fluid systems were used.
In fluid systems the displaced phase is crude oil, and the displacing phases are brine, surfactant solution, low and middle phases of microemulsions. The in-terfacial tension values are found between 25.5 0.05mN/m.
The result of the study shows:1. There is a considerable influence of IFT on relative permeability, and relative permeabilities of both phases increase with decreasing IFT; 2. Oil recovery increases with decreasing IFT.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
1991年第4期35-40,共6页
Petroleum Geology & Oilfield Development in Daqing
关键词
油田
渗透率
曲线
采收率
界面张力
: Relative permeability, Interfacial tension, Recovery
