关键词: 聚合物, 污水, 岩心, 注入能力

Abstract: As an important tertiary recovery technology, polymer flooding has obtained certain development achievement in Sanan development area of Daqing oilfield. But the surplus sewage exhausted from the polymer flooding has caused the waste of resource and the environmental pollution. The core flooding experiment which has diluted the polymer solution with the fresh water and the sewage was made to get this problem solved. According to the experimental results, the relationship between the concentration and viscosity of different molecular weight polymer was analyzed. Also, the injection capacity of the polymer solution with different molecular weight, permeability and concentration was analyzed. The injection capacity limit of the reservoir was divided according to the actual application. It has provided the reference for the screening of molecular weight and concentration of the polymer in actual production.

Key words: Polymer, Sewage, Core, Injection capacity