Researching On The Method Of Improving The Development Effect Of Polymer Displacement In Xingnan Oilfield

On the basis of the polymer field test and lab experiment on the Xing 13 development area in Xingshugang oilfield, this paper analyses three main factors that influenced the result of polymer displacement. First, the objective formation of polymer displacing is not complete, the controlling degree of net pattern is low; Second, the concentration of Ca2+,Mg2+ in injected water is high, which causes the concentration of injecting system is high but the viscosity is low; Last, the way of series of strata combination is not reasonable, which makes it difficult to develop thin-bed and thin-interbed. In this paper, we also discuss which net pattern and net pace are suitable in the polymer development block, discuss how to improve the injecting system and how to magage the polymer area technically and reasonably. Through the research, we think that it is profitable to take the way of pattern arrangement of"combination of third infill well pattern and tertiary oil recovery well pattern". Further, we can resolve the problem on water quality by improving polymer properties, taking film dealing technology to decrease the salinity of injected water and adding cross-linking agent.