周万富;王鑫;周泉;李国;张世东;

• 1:大庆油田有限责任公司采油工程研究院

摘要(Abstract)：

为了探索磺酸甜菜碱型两性聚丙烯酰胺/铬凝胶的自修复行为,分析体系中聚丙烯酰胺的类型、酸的种类,以及重铬酸钠、硫脲的质量分数、硫酸钠质量浓度对凝胶自修复行为的影响.结果表明:磺酸甜菜碱型两性聚丙烯酰胺/铬凝胶的自修复行为主要与两性聚丙烯酰胺的分子结构有关,凝胶经剪切破碎后,聚合物分子的疏水作用和静电作用导致凝胶的重新聚集而实现自修复;无机盐硫酸钠质量浓度是影响凝胶自修复性能的一个重要因素,最佳硫酸钠质量浓度为220~1 600mg/L;酸的种类与凝胶的自修复性能无关,主要是影响凝胶的成胶时间,其中乳酸能够形成有机铬,铬离子经过水解和羟桥作用形成多核羟桥络离子,再与聚丙烯酰胺中的—COO—配位形成网络结构的凝胶;重铬酸钠和硫脲为体系提供Cr3+,它们的质量浓度与凝胶的自修复行为无关.南5-10-P50井组应用结果表明:60d后凝胶黏度恢复率超过60%,调剖后启动压力平均提高3 MPa以上.

关键词(KeyWords)：自修复性能;铬凝胶;两性聚丙烯酰胺;调剖堵水

Abstract:

Keywords:

基金项目(Foundation):国家科技重大专项(2011ZX05052)

作者(Author):周万富;王鑫;周泉;李国;张世东;

Email:

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