...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>e-Polymers >Use of a novel pH-triggered polymer-gel system for optimal mobility-control applications
【24h】

Use of a novel pH-triggered polymer-gel system for optimal mobility-control applications

机译：新型pH触发聚合物凝胶系统在最佳迁移率控制应用中的使用

获取原文
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

There are two challenges in using polymers for conformance control applications in the petroleum industry. The first difficulty is to maintain a good injectivity to overcome the large pressure drop caused by the high viscosity of the polymers. Secondly, large polymer volumes required to be injected to compensate for polymer retention in a reservoir. The main objective of this work is to study the viability of using a pH-sensitive polyelectrolyte to alleviate the above two challenges. The results showed that the pH of the swelling medium has great effect on the swelling behavior of poly(acrylic acid) hydrogels. At low pH regime, the viscosity increases gradually as pH increases until certain pH value, ‘critical pH’ is reached. In the second regime and once critical pH value is exceeded, the viscosity increases sharply with the pH. This is followed by independency of the viscosity on pH, in the third regime. It was found that this sensitivity to the pH varies with the change in crosslink density and shear rates. At pH=4 (before the gellation), the sample (Carbopol 981) which has the lowest crosslink density exhibits the highest viscosity among the three samples. After the gellation (PH=8), the rheological behavior is reversed for the highest crosslinked density polymer (EZ-4) and the lowest crosslinked density polymer (981) which contradicts with the well known swelling ratio-crosslink density relation. It is concluded that the examined polymers are good candidates for mobility control applications. They can also be used for temporary zonal isolation since they can be easily broken down with mild acid wash and flowback.
机译：在聚合物中将聚合物用于一致性控制应用中存在两个挑战。第一个困难是保持良好的注入能力，以克服由聚合物的高粘度引起的大压降。其次，需要注入大体积的聚合物以补偿聚合物在储层中的滞留。这项工作的主要目的是研究使用pH敏感的聚电解质缓解上述两个挑战的可行性。结果表明，溶胀介质的pH值对聚丙烯酸水凝胶的溶胀行为有很大影响。在低pH范围内，粘度会随着pH的增加而逐渐增加，直到达到一定的pH值，即达到“临界pH”。在第二种方案中，一旦超过临界pH值，粘度就会随着pH值急剧增加。在第三方案中，随后是粘度对pH的独立性。发现对pH的敏感性随交联密度和剪切速率的变化而变化。在pH = 4（胶凝之前​​）时，交联密度最低的样品（Carbopol 981）在这三个样品中显示出最高的粘度。凝胶化（PH = 8）后，最高交联密度的聚合物（EZ-4）和最低交联密度的聚合物（981）的流变行为相反，这与众所周知的溶胀比-交联密度关系相反。结论是所检查的聚合物是用于迁移率控制应用的良好候选者。它们还可以用于临时的区域隔离，因为使用温和的酸洗和回流很容易将它们分解。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号