Influence of wettability on flow characteristics of water through microtubes and cores  

作　　者：WANG Fei YUE XiangAn XU ShaoLiang ZHANG LiJuan ZHAO RenBao HOU JiRui 

机构地区：[1]MOE Key Laboratory of Petroleum Engineering, Enhanced Oil Recovery Research Center, China University of Petroleum, Beijing 102249, China [2]China Sonangol International Limited, Shanghai 200060, China

出　　处：《Chinese Science Bulletin》2009年第13期2256-2262,共7页

基　　金：Supported by the National Natural Science Foundation of China (Grant No.50574060);National Basic Research Program of China (973Program) (Grant No.2005CB221303)

摘　　要：The flow characteristics of deionized water in hydrophilic and hydrophobic microtubes with diameters of 14.9,5.03 and 2.05 μm are investigated experimentally.The results indicate that the flow characteristics of deionized water in microtubes with diameter of 14.9 μm are in agreement with the classical Hagen-Poiseuille(H-P) equation,but for hydrophilic and hydrophobic microtubes with smaller diameters,the results show significant departure from the prediction of conventional theory,and the discrepancies are influenced by wettability of the microtubes and increase as the Reynolds numbers decrease.Besides,flows of fluid in cores are the macroscopic reflection of flows in countless micron-sized pore throats,the influence of wettability on microscale flow in pore throats will cause the change of seepage characteristic in cores.Therefore,flow experiments of brine through cores with different wettabilities are conducted.The results demonstrate that wettability exerts similar influence on water flows in cores and microtubes.The flow characteristics of deionized water in hydrophilic and hydrophobic microtubes with diameters of 14.9, 5.03 and 2.05 μm are investigated experimentally. The results indicate that the flow characteristics of deionized water in microtubes with diameter of 14.9 μm are in agreement with the classical Hagen-Poiseuille （H-P） equation, but for hydrophilic and hydrophobic microtubes with smaller diameters, the results show significant departure from the prediction of conventional theory, and the discrepancies are influenced by wettability of the microtubes and increase as the Reynolds numbers decrease. Besides, flows of fluid in cores are the macroscopic reflection of flows in countless mi- cron-sized pore throats, the influence of wettability on microscale flow in pore throats will cause the change of seepage characteristic in cores. Therefore, flow experiments of brine through cores with different wettabilities are conducted. The results demonstrate that wettability exerts similar influence on water flows in cores and microtubes.

关 键 词：流动特性 润湿性 内核 疏水 去离子水 流动实验 微尺度流动 渗流特性 

分 类 号：TQ051.13[化学工程] TB333[一般工业技术—材料科学与工程]