A Laboratory Study of the Microgel Used for Polymer Flooding

摘要

Microgel solution composed of hydrophobically associating polymer and chromium acetate was prepared by gelling under shear provided by a peristaltic pump running at required speed. Experiments were conducted to determine microgel size, injectivity, plugging ability during polymer flooding, and ability of enhanced oil recovery. Results showed that the size of the microgel obtained was in the range of 0.1-170 ìm by adjusting the rotational speed of the peristaltic pump. In polymer flooding, the microgel solution was intruded into the sand pack easily and could improve the plugging of following polymer flooding. Furthermore, the injection of microgel solution was useful to enhance oil recovery in the process of the following polymer flooding.