冻胶类堵剂对油水的不同封堵能力研究

利用岩心流动试验研究了三种强度不同的高温堵剂的封堵能力,并对影响封堵能力的因素进行了考察,研究了岩心渗透率、注入速度、油水相的影响。结果表明,冻胶类堵剂对水的封堵能力大于对油的封堵能力。这种选择性是由于油、水通过岩心时与冻股的相互作用不同造成的。水通过冻胶处理后的岩心时由于冻胶中的大分子受剪切取向而表现出非牛顿性;油通过冻胶处理后的岩心时,由于不与冻胜发生作用,因而表现出牛顿流体行为。

COMPARISON STUDY ON THE PLUGGING CAPABILITY OF GELS TO WATER AND OIL

Using core flow equipment to run the test of water shutoff capability, three kinds of high temperature resistance gel systems with different intensity were studled- Some influential factors such as permeability, injection rate, water and oil phases were investigat ed. The results show that the gels present higher plugging capacity to water than that to oil.We suggest that this plugging selectivity is due to the different interactions between water gel and oil/gel while they pass through the core. When water passes through the gel treated core, it has no interactions with gel. Therefore, it appeared the behavior of Newtonian fluid.