在富含粘土的砂岩中对阳离子和阴离子表面活性剂的性能进行实验研究
Chongtian Wu1, Zahraa Sabah Ghnim2, M Sudhakara Reddy3
1Academic Administration, Harbin University, Harbin, 150001, China. wct0709@163.com.
Scientific reports
|July 21, 2025
概括
这项研究引入了一种新的连续表面活性剂注射策略,用于在富含粘土的砂岩中增强石油回收. 该方法通过控制细微的迁移和减少界面张力来改善透性并促进石油回收.
科学领域:
- 石油工程是石油工程中的一个.
- 表面化学 表面化学
- 储水库工程 储水库工程
背景情况:
- 富含粘土的砂岩构成对增强石油回收 (EOR) 构成挑战,原因是低界面张力 (IFT) 和不受控制的微型迁移.
- 这些因素显著降低了储的透性和石油回收的整体效率.
研究的目的:
- 开发和评估一种新的连续注射策略,使用阴离子 (CTAB) 和阴离子 (SDS) 表面活性剂来克服富含粘土的砂岩中的EOR限制.
- 调查CTAB和SDS对细稳定,IFT减少和可湿性改变的互补机制.
主要方法:
- 系统地调查连续的CTAB和SDS表面活性剂注射.
- 泽塔潜力分析,以评估粘土粒子的电荷和稳定性.
- IFT测量以量化表面活性剂诱导的减少.
- 接触角度测试,以评估砂岩表面的湿度变化.
- 核心洪水实验以确定透性变化和石油回收因子.
主要成果:
- 泽塔电位测量显示了电荷变化,表明粘土通过CTAB稳定,通过SDS分散.
- 使用两种表面活性剂,IFT从43mN/m显著降低到大约1mN/m.
- 接触角度减少,表明表面活性剂暴露后砂岩疏水性降低.
- 连续注射达到81%的峰值恢复因子,明显高于单个盐水注射 (53%).
- 通过CTAB (65md) 提高了透性,并连续注入进一步优化了水库性能.
结论:
- 连续注射CTAB,然后进行SDS是一种有效的策略,用于增强富含粘土的砂岩中的石油回收.
- 这种方法成功地解决了细迁移控制和湿度变化的问题,从而改善了水库的透性和更高的回收因子.
- 该研究提供了关键的见解,将物理化学特性与动态储库过程联系起来,以优化EOR.
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