摘要
采用油酸改性纳米埃洛石管(HNTs)将部分水解聚丙烯酰胺(HPAM)与改性HNTs(O-HNTs)共混制备一种稳定的分散体系HPAM/O-HNTs。采用红外和接触角对O-HNTs的化学结构进行表征,并系统考察HPAM/O-HNTs的增黏性、耐温耐盐性、抗剪切性和驱油效果。结果表明:O-HNTs分子链中含有长烷基链、双键等疏水基团,具有疏水作用。加入O-HNTs后,HPAM/O-HNTs黏度明显提高,表现为优异的增黏性。HPAM/O-HNTs在30~90℃的NaCl(0~12000 mg·L^(-1))和CaCl2(0~12000 mg·L^(-1))溶液中的黏度均比HPAM高,表现出优异的耐温抗盐性能。90℃条件下,随着剪切速率增大,HPAM/O-HNTs黏度逐渐减小。500 r·s^(-1)条件下溶液黏度大于17.2 mPa·s,表现出优异的抗剪切性能。在相同条件下,HPAM/O-HNTs的驱油采收率比HPAM高12.3%,驱油效果显著。
A stable dispersing system HPAM/O-HNTs was prepared by mixing partially hydrolyzed polyacrylamide(HPAM) with modified HNTs(O-HNTs) using oleic acid modified halloysite nanotube(HNTs). The chemical structure of O-HNTs was characterized by infrared, and contact Angle. The viscosity enhancement, temperature and salt resistance, shear resistance and oil displacement effect of HPAM/O-HNTs were systematically investigated. Infrared results show that the O-HNTs molecular chains contain long alkyl chains, double bonds and other hydrophobic groups, which play a hydrophobic role. After adding O-HNTs, the viscosity of HPAM/O-HNTs is obviously improved, showing excellent viscosity enhancement. At the same time, the viscosity of HPAM/O-HNTs at 30~90 ℃, NaCl(0~12000 mg·L^(-1)), CaCl_(2)(0~12000 mg·L^(-1)) is higher than that of HPAM, showing excellent temperature and salt resistance. In addition, under the condition of 90 ℃, with the increase of shear rate, HPAM/O-HNTs viscosity decreases gradually, and solution viscosity is greater than 17.2 mPa·s under 500 r·s^(-1), exhibited excellent shear resistance. HPAM/O-HNTs has a better displacement effect than HPAM. Under the same conditions, the oil recovery efficiency of HPAM/O-HNTs is 12.3% higher than that of HPAM, and the oil displacement effect is significant.
作者
周飞
尹冰
戴倩倩
董正亮
吴文川
ZHOU Fei;YIN Bing;DAI Qianqian;DONG Zhengliang;WU Wenchuan(Drilling and Production Technology Research Institute,Petro China Liaohe Oilfield Company,Panjin 124010,China;Sichuan Salt Geology Drilling Team,Zigong 643021,China;College of Chemistry and Environmental Engineering,Yangtze University,Jingzhou 434023,China;School of Petroleum and Natural Gas Engineering,Southwest Petroleum University,Chengdu 610500,China)
出处
《合成化学》
CAS
2023年第2期117-123,共7页
Chinese Journal of Synthetic Chemistry
基金
油气藏地质与开发工程国家重点实验室开放基金资助项目(PLN2021-13)。
关键词
聚丙烯酰胺
埃洛石管
油酸改性
耐温抗盐
黏度
抗剪切
驱油效果
polyacrylamide
halloysite nanotube
oleic acid modification
temperature and salt resistance
viscosity
resistant to shear
oil displacement effect
