Feasibility of Sequestration of CO2 into waterflooded sand-A Simulation Study

The increase of Greenhouse gases emission is a growing concern nowadays all over the
world. The consequences of the global warming which is caused by the Greenhouse gases
emission start to be seen everywhere. Geological sequestration of carbon dioxide is one
of the few ways available to reduce the emission of CO2. Deep saline aquifers considered
as the primary option for sequestration of CO2. However, oil and gas reservoirs offers
huge storage capabilities for long term. Even though, CO2 is currently being used as an
enhanced oil recovery operation, injection of CO2 as a carbon sequestration strategy needs
validation. This study focus on storing CO2 in watered-out reservoirs which are shallower
compared to deep saline aquifers, it has relatively similar storage conditions to deep saline
aquifers with advantage of the surface facilities and the information available. The
watered-out reservoir has been producing for long time until the aquifer has moved up and
the water saturation became very high. The injected CO2 dissolves and diffuses in oil and
water, then the dissolved CO2 reacts with formation minerals and induces precipitation of
minerals.