摘要
关于聚合物驱油机理，国内外较普遍的观点是聚合物驱油可以改善水油流度比，扩大水驱波及效率。近年来，有关报导提出聚合物驱也可以提高驱油效率。针对大港油田港西四区聚合物驱油试验实际情况，先后在室内开展了聚合物驱油物理模拟试验、聚合物驱油机理的微观渗流试验研究等。根据室内研究结果，提出了港西四区井组聚合物驱油机理如下：①改善流度比、扩大水驱波及体积。②提高水驱油效率。
eneral opinion of polymer flooding mechanism is that polymer flooding can improvemobility ratio between oil and water. and raise waterflood sweep efficiency. It is recently re-ported that polymer flooding also raises oil recovery ratio. On the basis of polyrner floodingtest in No. 4 area of Gangxi oil field . we did some laboratorial experiments of polymer flood-ing, such as the physical modeling. micro vadose analysis in the mechanism and so on. Byanalysing the laboratorial research results . we put forward two major mechanisms: 1)raisingniobility ratio and waterflood swept volume, and 2) improving the efficiency of water displacement.
