Abstract: It has been found that the flow behavior of water through rock samples with retained polymer molecules in it does not follow Darcy's law. Permeabilities decrease with the decrease of pressure differential or flow rate, which has been observed when routine measurements for determining rock permeability to water is being conducted. This phenomenon is believed to be attributed to the viscoelastic effect of the retained molecules. The mechanism of the improvement of injectivity profiles by viscoelastic effect of the molecules and a new technique for injecetion profile adjustment are presented. The relationship between the polymer slug size and the extent to which injection profiles can be modified was studied. The effects of four factors, such as polymer type, polymer solution concentration, slug injection mode and injection rate on the effectiveness of the new technique was also investigated.

摘要： 在滞留有聚合物的岩心中,水的流动规律不符合达西定律.对含有滞留聚合物分子的岩心进行常规的水测渗透率试验.发现渗透率随流动压差或流速降低而降低,这一现象归结为岩心中滞留聚合物分子的粘弹回复效应.本文研究了粘弹回复调整吸水剖面的机理,提出了一种利用滞留聚合物分子粘弹效应调剖的方法,并对聚合物段塞体积与调剖深度的关系以及聚合物类型、溶液浓度、段塞注入方式和注入速度等四种因素对调剖效果的影响进行了研究.

关键词: 聚合物, 调剖, 粘弹效应, 试验