Abstract:Abstract:The oil filed need a mass of water to configurate polymer to displacement of reservoir oil.While, the sewage cannot be infuse back to the oil layer moreover it cauesed the waste of resource and pollute the environmental. Therefore, the research of preparation polymer by sewage is very importment.In the experiment ,change the factor of the sewage ,for example the mineralization ,the content of bacterium,the reductive substance and the content of oil.By these ways,we can check out which factor is the most important to effect the viscosity of the polymer, and confirm the feasibility of confecting polymer by sewage.