聚合物微球调驱剂的制备及其在多孔介质中的微观渗流规律

Preparation of Polymer Microspheres Regulating Agent and Microscopic Percolation Law in Porous Media

采用反相微乳液法/乳液法制备了聚合物微球调驱剂,并在微流控芯片中进行了物模实验评价及模拟,分析了聚合物微球调驱剂在岩石孔隙中的输运机理。结果表明:多孔介质的孔隙大于聚合物微球调驱剂直径时,大量微球在微通道中的运移会增加流动阻力及近壁面区域的剪切力;多孔介质的孔隙略大于聚合物微球调驱剂直径时,多个聚合物微球一同进入;在随机生成的多孔介质结构中,微球大颗粒的通过能够导致更大的压力波动,但微球数量越多,滞留情况越严重。

The polymer microsphere profile control-displacement agent was prepared by reverse phase microemulsion method/emulsion method. In the microfluidic chip, the experimental evaluation and simulation of the physical model were carried out and a study of the transport mechanism of the polymer microsphere profile control-displacement agent in the pores of the rock was made out. The results showed that when pore diameter of the porous medium is larger than the diameter of the polymer microsphere profile control-displacement agent, the migration of a large number of microspheres in the microchannel would increase the flow friction and wall shear stress. When the pore diameter of the porous medium is slightly larger than the diameter of the polymer microsphere profile control-displacement agent, multiple polymer microspheres entered together, in the structure of the randomly generated porous medium, the passage of the microspheres granules could cause greater pressure fluctuations, but result in more microspheres granules and severer retention.