Society of Petroleum Engineers Journal | VOL. 4

A Calculation Method for Carbonated Water Flooding

Publication Date Mar 1, 1964


DE NEVERS, NOEL, CALIFORNIA RESEARCH CORP., LA HABRA, CALIF. Abstract A calculation method has been developed for carbonated water flooding. This method takes into account the effects of oil viscosity reduction and oil swelling, due to carbon dioxide transferred to the reservoir oil from the carbonated flood water. It shows the effect of changes in carbonation pressure and carbonated water slug size. The method is based on a Buckley-Leverett- type linear flow model. The mathematical approach is similar to that developed by Welge, et al, for enriched gas drives. However, it contains a very important advance over the previous papers in its solution to the problem of injection of a "slug" of carbonated water rather than continuous injection of fluid of constant composition. The method also shows the chromatographic nature of the transport of CO2 in a carbonated water flood. Sample calculations indicate that viscosity reduction is the most important source of incremental oil recovery. Swelling contributes to a lesser extent. Raising the carbonation pressure increases recovery, but this effect diminishes as pressure is increased. Increasing the slug size also increases recovery, but again this effect diminishes as slug size is increased. Introduction In recent years there has been considerable interest in carbonated water flooding as a secondary recovery method. Several carbonated waterflood field tests are now in prog...


Carbonated Water Flooding Carbonated Water Slug Size Plain Water Oil Recovery Oil Swelling Lower Residual Oil Saturation Stock Tank Oil LA HABRA Carbon Dioxide Transfers

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