Research progress of thickening mechanism of supercritical carbon dioxide by thickener
This paper focuses on the research progress related to the thickening mechanism of carbon diox-ide.And the four mechanisms of thickening carbon dioxide are summarized.The basic theory of supercriti-cal CO2 viscidity increase is similar solubilization mechanism.Entropy increase and enthalpy decrease is an important mechanism for increasing viscosity of supercritical CO2.The viscosity of supercritical CO2 is increased by changing its physical state and intermolecular interaction force.The"π-π stacking"mecha-nism and Lewis acid-base theory can guide the development of synthetic polymer viscosifier and further improve the viscosification effect of supercritical CO2.Supercritical CO2 viscosification technology has broad application prospects in the field of CO2 fracturing and CO2 flooding enhanced oil recovery technolo-gy,but its theoretical research is relatively weak,which limits the industrialization process of this technolo-gy,and a lot of research needs to be done.
万方数据
