多孔介质表面润湿性对交联聚合物溶液封堵性能的影响  

THE EFFECT OF SURFACE WETTABILITY OF POROUS MEDIA ON THE PLUGGING PROPERTIES OF LPS

作　　者：林梅钦[1] 赵志海[1] 李明远[1] 董朝霞[1] 彭勃[1] 

机构地区：[1]中国石油大学提高采收率研究中心,北京102249

出　　处：《石油学报（石油加工）》2009年第1期91-95,共5页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：中国石油大学重质油国家重点实验室开放基金项目(200409)资助

摘　　要：采用毛玻璃模型、填充砂管和人造岩心封堵实验，研究了多孔介质的表面润湿性对交联聚合物溶液（LPS）封堵性能的影响。结果表明，未经甲基硅油处理的毛玻璃模型注入4．5Vp（Vp-孔隙体积）的LPS后，体系压力明显匕升，达到120kPa左右；经甲基硅油处理的毛玻璃模型注入10Vp的LPS后，体系压力始终保持在比较低的水平（6～8kPa）。未经甲基硅油处理的填充砂管注入40Vp的LPS后，体系压力达到70kPa左右；经甲基硅油处理过的填充砂管注入80Vp的LPS后，体系压力只达到18kPa，没有明显上升。岩心并联实验中，甲基硅油处理的岩心与未经甲基硅油处理的岩心相比，注水时的出口液体流量明显降低，但注LPS后的出口液体流量明显增加。这表明LPS具有选择性封堵性质，即易于封堵水润湿的多孔介质，而难于封堵油润湿的多孔介质。The effect of surface wettability of porous media on the plugging properties of LPS was studied through the ground glass model, quartz sand-packed tube and artificial core plugging experiments. The results showed that in the ground glass model and quartz sand-packed tube which were not treated with methyl silicon oil, the system pressures increased evidently after 4.5 Vp （Vp is pore volume） injection of LPS, reaching around 120 kPa and 70 kPa （40 Vp）, respectively, while in the ground glass model and quartz sand-packed tube treated with methyl silicon oil, the system pressure maintained at a low level, reaching about 6--8 kPa after 10 Vp injection of LPS and 18 kPa after 80 Vp injection of LPS, respectively, having no significant rise. In the parallel core experiment, during the water injection stage before the LPS injection, the flux at the exit of the core treated with methyl silicon oil was obviously lower than that of the untreated core. During the LPS injection stage, the flux at the exit of the core treated with methyl silicon oil increased significantly, surpassing that of the untreated core. The conclusion is that, it is easy for LPS to seal water wet media while difficult for oil wet media.

关 键 词：交联聚合物溶液 封堵性质 孔隙介质 表面润湿性 

分 类 号：O631.4[理学—高分子化学]