The Effect of Asphaltene Precipitation during CO 2 Injection for Light Oil Reservoir

: This paper focused on the asphaltene precipitation problem under dynamic induced by carbon dioxide injection. In spite of being Co 2 one of common used methods in oil reservoir, it may change the crude oil properties and increase the chances of having asphaltene precipitation. The existence of asphaltene in precipitation shape, flocculation or deposition may change the crude oil composition and reduce the oil recovery. The effect of the asphaltene on reservoir characteristics has the major concern and the damage that occurred by asphaltene can cause formation sever. Thus, this research makes effort to achieve and understand the asphaltene precipitation phenomena created by carbon dioxide injection. Therefore, a light crude oil sample was selected since the light oils are favour to have asphaltene precipitation issue. The presence of carbon dioxide under various injections flow rates are investigated among this research. The results indicated that the precipitated of asphltenehas significant effectas the pore volume of gasinjected greater. Furthermore, it was observed that asphaltene precipitation more sensitive to the injection flow rate0.8 cc/min.