Interaction of Foam and Microemulsion Components in Low-Tension-Gas Flooding  

作　　者：Jing Zhao Jun Yang 

机构地区：[1]School of Petroleum Engineering,Changzhou University,Changzhou,213164,China

出　　处：《Fluid Dynamics & Materials Processing》2023年第7期1951-1961,共11页流体力学与材料加工（英文）

摘　　要：Low-Tension-Foam(LTF)flooding is an emerging enhanced oil recovery technique for low-permeability carbonate reservoirs.Foam capacity is closely related to the salinity environment(or,equivalently,the phase behavior of the oil/water/surfactant system).Therefore,the interactions between microemulsion and foam components are of primary importance in the LTF process.In this study,the phase behavior of an oil/water/surfactant system under equilibrium is analyzed,firstly by assuming perfect mixing.Meanwhile,the formation kinetics of microemulsion are monitored through a novel low-field NMR technique,which is able to provide quantitative assessment on the microemulsion evolution characteristics.Then,foam stability is examined in the absence and in the presence of Winsor-Ⅰ and Winsor-Ⅲ type microemulsions.It is revealed that foam stability depends on the oil solubilization(oil swollen micelle size).A decrease in the oil swollen micelle size and micellar structure effectiveness,in conjunction with an increasing salinity,leads to lower foam stability in the presence of a Winsor-Ⅲ type microemulsion.

关 键 词：Foam mobility control MICROEMULSION INJECTIVITY fluid flow 

分 类 号：O35[理学—流体力学]