关键词: 微乳液, 非稳定法, 相对渗透率, 渗流机理, 实验

Abstract: The study on mechanism of micellar flooding is one of the most paramount fundamental works in enhanced oil recovery techniques.After a broad investigation into the background of micellar flooding techniques,two and three phase relative permeabilities have been studied in brine oil microemulsion systems by a lot of unsteady state measurements.The method,called Welge/JBN,is adopted for data processing.It is proved that the experimental strategies and data handling method are reasonable and the results obtained by unsteady state method are in line with that gained by steady state method.Analysis and discussion for hysteresis effect, influence of viscosity and interfacial tension on the characteristic of relative permeability curves have been given;comparisons are also made between the steady state and the unsteady state method.Some important results have been obtained,which will improve the knowledge about relative permeabilities and percolation mechanism of brine oil microemulsion systems in formation.

Key words: microemulsion, unsteady state method, relative permeability, percolation mechanism, experiment