Abstract
Since 2nd World War, waterflooding remains a major method of oil production in Russia. Improved waterflooding with low capital investments and high incremental recovery would highly impact the country's economy.
The paper proposes several methods of produced water deceleration by induced migration and straining of the natural reservoir fines, yielding the produced water decrease and sweep efficiency enhancement. It includes low-salinity/smart waterflooding with fines mobilization and permeability reduction in swept zones, yielding the sweep efficiency enhancement. Other methods are based on short-term injection of small banks of fresh or low salinity water in order to block the produced water by creation of the low-permeability shields due to migration of mobilized fines.
The validity of the results is defined by micro-scale and core-scale modelling, laboratory studies, upscaling of results up to the reservoir scale and by the field data.
