G123 原油増進回収のCO_2溶解による油の体積膨張(OS-9: エネルギー・CO_2削減(2))

Abstract

Improvement of the oil recovery rate is of great importance 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, fundamental dissolution and swelling process of decane/ CO_2 was observed under high pressure. As the result, it was calculated that the rate of swelling in the vicinity of the interface increases rapidly. It was also observed that the partial pressure of CO_2 has a dominant influence on the rate of swelling.