摘要
Abstract
With gelation time,gel strength,and gel stability as parameters,the crosslinking rules of water-soluble phenolic resin(WSPR),amino resin,and partially hydrolyzed polyacrylamide(HPAM)were investigated under the conditions of 90℃and salinity of 41 529 mg/L.The gelled samples were characterized by FTIR and cryo-SEM.The results show that the addition of 1%(w)nano SiO2 particles(QC-W)to the gelation solution containing HPAM and WSPR could shorten the gelation time,while significantly enhancing the gel stability.The gelation time of the gel is 10-24 h,with the storage modulus of 10-23 Pa,and the dehydration rate after 120 d heat treatment of less than 5%,which could adapt to the conditions of 90℃and a salt content of 41 529 mg/L in water.The strength of the gel constructed by adding 1%(w)QC-W to the gelation solution of HPAM and amino resin is higher than that of the WSPR gel.However,after 90 d of heat treatment,only the gel formed by high-concentration HPAM is stable,while other gels exhibit significant dehydration and shrinkage.According to the characterization results,the dehydration and shrinkage of the gel are related to the hydrolysis of the amide group and the cross-linking of calcium and magnesium ions in the gel.关键词
调剖堵水/冻胶/聚丙烯酰胺/水溶性酚醛树脂/氨基树脂/纳米颗粒Key words
profile control and water shutoff/gel/polyacrylamide/water-soluble phenolic resin/amino resin/nano-particles分类
化学化工
