普遍认为聚合物溶液可有效提高波及效率。
It's known to all that polymer solution can increase sweep efficiency.
因此，确切地说聚合物驱可以提高波及效率，但不能认为聚合物驱可以提高驱油效率。
Therefore, we can make sure that polymer flooding can obviously improve a sweeping efficiency, but do not think it can improve oil displacement efficiency.
是既有提高波及系数，也有提高洗油效率的一种新的提高原油采收率技术。
This is a new EOR technology which can improve swept factor and oil displacement efficiency.
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