In the vertical direction, follow-up water diverted from the high-permeability layer to the low-permeability layer to enhance the vertical sweep efficiency.
在纵向上，后续水从高渗层转向低渗透层，提高纵向波及系数。
Results show that polymer flooding can improve the producing reserves effectively, extend the plane sweep efficiency, reduce the difference between layers and balance the in-layer vertical producing.
结果表明，聚合物驱可有效地提高油层的动用状况，扩大平面波及系数，减小层间差异，使层内纵向动用更加均匀。
In particular, discontinuous shales, acting as vertical flow barriers, affect significantly the sweep efficiency of oil reservoirs.
特别是，不连续的页岩，作为垂直的流体流动遮挡，极大影响油罐的洗油效率。
In particular, discontinuous shales, acting as vertical flow barriers, affect significantly the sweep efficiency of oil reservoirs.
特别是，不连续的页岩，作为垂直的流体流动遮挡，极大影响油罐的洗油效率。
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