The reservoir property and development status of medium-low permeable reservoirs in Daqing Oil Field are different form the major reservoirs will have much error for polymer selection.

• 与主力油层相比，大庆油田中、低渗透率油层物性及发育状况均发生很大变化，如果仍沿用主力油层聚驱的聚合物相对分子品质确定方法，必将会对聚合物相对分子质量的选择造成很大的误差。