Based on the analysis of dynamic characteristics in field tests area and commercialized production areas for polymer injection in class II reservoirs, some problems about polymer flooding in class II reservoirs can be found, such as low injectivity, low liquids productivity, short period with low water cut and serious planar conflicts.

How to determine reasonable injection-production well pattern and how to optimize well pattern in class II reservoirs during polymer flooding are the problems needed to be solved at right.

The development technology of polymer flooding in major reservoirs has become mature,however,it is hard to grasp the effectiveness regularity of the technology in class II reservoirs due to differences between major reservoirs and class II reservoirs.

According to the geologic features of ClassⅡoil reservoir in North Saertu development area, this paper has made careful study on the development effect and economic profit of ASP flooding, so as to find the favorable well spacing, combination of strata series and ASP development optimization method.

Optimization of the injection parameters of sub-layers polymer flooding in Daqing Oil Field;

Properties and mechanism of high mass concentration polymer solution in sub-layers

The heterogeneity of Sub-layers is grave.

Through cases of the representative block,usage status and flooding status of the second class reservoir can be analyzed with the completion logging data in the block.