Effect of EOR technology on Wettability and Oil Recovery of Carbonate and Sandstone Formation

Modification of injection water salinity to improve oil recovery is not a new idea and the process has been investigated as far<br>back as the 70’s prior to the use of other chemical processes to improve oil recovery. In practice in planning water flooding<br>project oil companies focused only on the compatibility of injection water and formation water issue to eliminate any<br>possibility of formation damage. Many investigators recently had focused their research on the role of water salinity alteration<br>to improve oil recovery. A number of possible mechanisms concerning alteration of water flooding salinity have been<br>proposed in the literature.