Gudong Oilfield belongs to high permeability fluviatile deposit unconsolidated sandstone reservoir.Its heterogeneity is serious and permeability contrast is large,so it profits ploymer flooding.

• 孤东油田八区属高渗透河流相沉积的稠油疏松砂岩油藏,非均质严重,渗透率级差大,有利于聚合物驱。