HAGS通过封堵高渗层，调整模型的渗透率差异，使液流转向低渗层，从而达到提高采收率的目的。
HAGS can increase oil recovery by adjusting the permeability variation through plugging the higher permeability layer and forcing the injected water to flow into the lower permeability layer.
弱凝胶使后续液流转向，在绝大多数情况下，小孔隙中的剩余油是被弱凝胶驱动的水（和油）驱出的。
The weak gel thus diverts the followed fluids and in predominant cases the residual oil is displaced out of small pores by the water (or oil) in front of the gel stream.
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