Abstract
Improvement of oil recovery rate is of great importance for carbon dioxide enhanced oil recovery (CO_2EOR), and fundamental mechanism of Oil/CO_2 two-phase flow in porous media is need to be clarified. However, flow process is still not completely understood because of the difficluty of experimental flow visualization. In this study, CO_2 was injected into a packed bed of silica sand that was saturated by decane, and two-phase flow process of decane/CO_2 under high pressure was visualized by using micro-focus X-Ray CT. As the result, three-dimensional behavior of the CO_2 distribution was clearly observed.
