In this study the role of Polymer flooding as one of the most efficient processes to enhance oil
recovery (EOR) is discussed. As we know, Polyhydroxybutyrate (PHB) is a bio-based polymer that
has potential application for use in polymer flooding. This polymer is reviewed with particular
emphasis on the effect of concentration, shear rate, salinity, hardness and temperature on polymer
viscosity. Initial findings showed that PHB owned higher resistant as compared to mechanical
degradation and thermal stability of HPAM as well as XG.