Direct Observation of CO2 Transport and Oil Displacement Mechanisms in CO2/Water/Oil Systems

As the concern over the greenhouse gas effects of carbon dioxide (CO2) increases, its injection into oil and<br>gas reservoirs for enhancing hydrocarbon recovery and in saline aquifers for storage is on the rise.<br>Variation of reservoir pressure and temperature affects the properties of CO2 and its interaction with<br>reservoirs resident phases. Although in most cases CO2 would be in supercritical state at reservoir<br>conditions, however, it is necessary to understand the flow and displacement mechanisms of CO2/water/<br>oil systems in porous media under various reservoir conditions.