Chemical flooding is a flexible enhanced oil recovery(EOR) method and has the potential of recovering more residual crude oil than other available methods. The capability to adjust an injected chemical formulation for a wide range of reservoir conditions. and crude oil types remains a valid strong point for this technology. It has been identified by the Department of Energy (DOE) as an important oil production technique targeted for Class 1 reservoirs. For many U.S. domestic oil reservoirs, chemical flooding may be the only viable EOR method.