摘要
将石英砂与表面修饰改性的纳米氧化锌微粒及氟硅树脂混合经高温处理制备了具有"荷叶效应"的超疏水控水砂,通过显微镜、红外光谱、接触角、耐温性测试及岩心流动驱替实验评价了该超疏水控水砂的结构与性能。结果表明:超疏水控水砂表面具有荔枝皮状粗糙结构,水在复合粒子构成的非均相界面上的接触角符合Cassie模型;水在超疏水复合砂表面的静态接触角达158°,滚动角约为5°,达到超疏水要求;80℃条件下,岩心流动驱替NFRR值为5.3,表明该超疏水控水砂具有优良的控水性能;耐温达到120℃。合成的控水砂在胜利油田高含水区块进行了4井次的现场先导试验,现场应用效果明显,初期平均降水率达16.55%。
A superhydrophobic composite water control sand（SCWCS）was prepared by heat-treating the mixing system of the quartz sand,modified nano-Zno and the fluorosilicic resin with self-assembly function.Relationships between the surface microstructure,roughness and the wettability of the surface of the SCWCS were investigated by electron microscope,infrared spectrophotometry（IR）,measurement of contact angle and heat resistance,and core displacement test.The results showed that the SCWCS had a rough texture like litchi wall,the contact angle of water on the surface of the SCWCS was 158°and the sliding angle was 5°,reaching the required standard of superhydrophobicity.The core displacement experiment showed that the NFRR value at 80℃was 5.3,indicating that the water-control performance of the SCWCS was good.This kind of water control sand has been used in 4 wells in Shengli oilfield,the average water cut of 4 producing wells decreased by 16.55% within one month.
出处
《油田化学》
CAS
CSCD
北大核心
2011年第4期402-405,共4页
Oilfield Chemistry
关键词
超疏水
防砂
控水砂
堵水
胜利油田
superhydrophobic
sand control
water control sand
water blockoff
Shengli oilfield
