纳米SiO_(2)对聚合物FRSP-1乳液黏度特性影响  

Effect of Nano-silica on the Viscosity Characteristics of Polymer FRSP-1 Solution

作　　者：王满学[1] 何静 赵小平 韦海龙[1] WANG Manxue;HE Jing;ZHAO Xiaoping;WEI Hailong(College of Chemistry and Chemical Engineering,Xi′an Shiyou University,Xi′an,Shaanxi 710065,China;Research Institute of Shaanxi Yanchang Petroleum(Group)Co.Ltd.,Oilfield Company,Xi′an,Shaanxi 710075,China;School of Economic and Management,Xi′an Shiyou University,Xi′an,Shaanxi 710065,China)

机构地区：[1]西安石油大学化学化工学院,陕西西安710065 [2]陕西延长石油(集团)有限责任公司研究院,陕西西安710075 [3]西安石油大学经济管理学院,陕西西安710065

出　　处：《西南石油大学学报（自然科学版）》2022年第2期168-176,共9页Journal of Southwest Petroleum University(Science & Technology Edition)

摘　　要：针对聚合物乳液抗盐性差,影响溶液黏度和其他性能问题,合成聚合物乳液FRSP-1,研究了聚合物乳液FRSP-1在水中的分散溶解性、溶解性、抗盐性、流变性以及纳米SiO_(2)对FRSP-1溶液的黏度特性、抗剪切性以及滤失性等影响。结果表明,FRSP-1乳液在水中分散性好,在20 s内FRSP-1乳液在水中的黏度可达到最大值90%以上;pH值对FRSP-1溶液黏度影响较大,当水溶液pH值在7~9,有助于得到高黏度的FRSP-1溶液;盐对FRSP-1溶液的黏度影响较大,其中二价盐较一价盐对FRSP-1溶液的黏度影响大且溶液的盐浓度越大,FRSP-1溶液的黏度越小,其影响程度由大到小的次序为CaCl_(2)>NaCl>KCl≥NH_(4)Cl;在FRSP-1溶液中引入纳米SiO_(2),对其抗盐性、抗剪切性、流变性和滤失性能实验表明,纳米SiO_(2)可以显著改善FRSP-1溶液的综合特性。按照1.0%FRSP-1+0.5%NH_(4)Cl+98.5%水+0.025%纳米SiO_(2)制备的溶液,在90℃、170 s^(-1)下连续剪切60 min后的黏度为46 mPa·s,其溶液在10 min时的滤失量为14.1 mL,这些特性与未加SiO_(2)空白样相比,FRSP-1溶液黏度提高了近40%,滤失量降低近45%,同时,FRSP-1溶液的触变性也得到了显著改善。In view of the poor salt resistance of the polymer emulsion,which affects the viscosity and other performance problems of the solution,in this paper,the polymer emulsion FRSP-1 is synthesized,and the dispersion and solubility of FRSP-1 in water,salt resistance,rheological properties,and the influence of nano-SiO_(2)on the temperature resistance,shear resistance and fluid loss of FRSP-1 solution are studied.The results show that FRSP-1 emulsion has good dispersibility in water,and the viscosity of FRSP-1 emulsion in water can reach more than 90%of the maximum value within 20 seconds;pH has a great influence on the viscosity of FRSP-1 aqueous solution.When the pH of the aqueous solution is between 7 and 9,it is helpful to obtain a high-viscosity FRSP-1 solution;salt has a greater influence on the viscosity of FRSP-1 solution.Divalent salt has a greater influence on the viscosity of FRSP-1 solution than monovalent salt.The greater the salt concentration of the solution,the smaller the viscosity of FRSP-1 solution,and the degree of influence is determined by the order of big to small is CaCl_(2)>NaCl>KCl≥NH_(4)Cl;the salt resistance,shear resistance,rheology and fluid loss performance of FRSP-1 solution are significantly improved compared with that without nano SiO_(2).According to the solution prepared by 1.0%FRSP-1+0.5%NH_(4)Cl+98.5%water+0.025%SiO_(2),the viscosity after continuous shearing at 90℃and 170 s^(-1)for 60 min is 46 mPa·s,and the fluid loss at 10 min compared with no nano-SiO_(2),the viscosity of FRSP-1 solution has increased by nearly 40%,and the fluid loss has been reduced by 45%.At the same time,the thixotropic properties of FRSP-1 solution has also been significantly improved.

关 键 词：聚合物乳液 纳米颗粒 二氧化硅 黏度 流变特性 

分 类 号：TE357.12[石油与天然气工程—油气田开发工程]