The simulated water was treated using the clay and the organoclay. Then, HPAM removal efficiency was compared with the produced water. The results show that both the clay and the organoclay could be used to remove HPAM. However, pH value had different effects on the simulated water and the produced water, maybe due to residue oil droplets and other impurities. The micro structures were observed with particle imager and scanning electron microscopy (SEM).