Carbonated water injection revisited
by Chang Hong Gao
International Journal of Petroleum Engineering (IJPE), Vol. 1, No. 3, 2015

Abstract: Carbon dioxide is a major greenhouse gas, but also an effective agent for enhanced oil recovery (EOR). Large scale CO₂-EOR projects are being carried out in the USA and Canada. However, such projects are not common outside North America due to limited supply of CO₂. Carbonated water injection (CWI) process is to inject water saturated with CO₂. The CO₂ in carbonated water diffuses into oil and results in oil swelling and viscosity reduction. CWI requires much less CO₂ supply. Several successful CWI field pilots were conducted in 1960s. Oil fields with good EOR potential and limited CO₂ supply should seriously consider CWI method.

Online publication date: Mon, 10-Aug-2015

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