Abstract
Improvement of the oil recovery rate is important issue for carbon dioxide enhanced oil recovery (CO_2EOR); however, effective way to improve the efficiency of CO_2EOR is still not completely understood because of complexity of dissolution phenomena; swelling, reduction of viscosity and interface tension. In this study, mixing process of decane/CO_2 was observed under miscible condition, i.e. high pressure and high temperature. As the result, dissolution phenomenon was observed directly by injecting CO_2 into decane. Dissolution process of CO_2 in decane phase was also obtained by Raman spectroscopy.
