疏水性修改的聚合物-表面活性剂自组装系统:对自厚转向酸溶液的研究
Yanna Zhang1,2, Jincai Wang1, Hongping Quan3,4
1Research Institute of Petroleum Exploration & Development, Beijing 100083, China.
ACS omega
|January 8, 2026
概括
这项研究开发了一种新型的酸添加剂,一种水性修饰的triblock共聚物ASN,用于增强酸转移操作. 自组装的系统表现出优越的粘度,温度和剪切阻力,提高了油田酸化效率.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 石油工程是石油工程中的一个.
背景情况:
- 有效的酸性添加剂对于优化石油和天然气运营中的酸转移至关重要.
- 开发能够承受恶劣下井条件的坚固材料是一个关键的挑战.
研究的目的:
- 为了合成和评估一种新的疏水性修饰的triblock共聚合物,ASN (烯胺-styrene-N-vinylimidazoletriblock共聚合物),作为一种酸性添加剂.
- 研究ASN与八甲基三甲基化物 (STAC) 的自组装行为及其对酸转移和阻滞性能的影响.
- 探索自组装系统由酸触发的自我加厚行为背后的机制.
主要方法:
- 三重阻断共聚物ASN的合成.
- 在酸性溶液中自组装ASN与表面活性剂STAC.
- 使用风湿计进行风湿学测试 (温度,抗剪,粘弹性).
- 使用动态光散射和环境扫描电子显微镜对自组装结构的表征.
- 在模拟水库条件下评估酸转移和阻滞性能.
主要成果:
- 最佳的ASN:STAC摩尔比率 (1.0:0.2) 产生了250mPa·s的峰值粘度,比其他比率高出40%,粘度保留后岩石反应85%.
- 自组装的溶液在160°C和170s-1.1时1小时后保持了104mPa·s的表面粘度.
- 观察到优异的温度和剪切阻力,在110°C时达到高达85%的减速率.
- 酸岩反应,特别是HCl消耗和Ca2+降水,被确定为系统自我加厚行为的关键驱动因素,导致>80%的粘度波动.
结论:
- 疏水性修改的triblock共聚合物ASN,当与STAC自组装时,在酸转移操作中提供了显著的改进.
- 开发的自组装酸溶液表现出卓越的热稳定性,剪切阻力和延迟能力,使其适用于高温油田应用.
- 了解酸触发的自我加厚机制为设计先进的流体系统提供了洞察力,以增强石油回收.
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