孔尺度分析和可视化,在复杂的碳酸盐中对三级电离表面活性剂的洪水进行分析和可视化
Hussain M AlZahrani1, Branko Bijeljic1, Rukuan Chai1
1Department of Earth Science and Engineering, Imperial College London, London, South Kensington SW7 2AZ, United Kingdom.
ACS omega
|November 10, 2025
概括
表面活性物二甲基三甲 (DTAB) 泛滥通过改变可湿性和降低界面张力,增强碳酸盐岩中的石油回收. 这种方法有效地从小孔中调动油,提供了具有成本效益的增强石油回收解决方案.
科学领域:
- 石油工程是石油工程中的一个.
- 化学工程是化学工程的重要组成部分.
- 地质科学是地球科学.
背景情况:
- 增强石油回收 (EOR) 对于最大限度地从成熟水库中提取碳化合物至关重要.
- 碳酸盐储库对EOR构成独特的挑战,因为其复杂的孔隙结构和可湿性特征.
- 三级EOR方法,如表面活性剂泛滥,在初级和二级恢复阶段后使用.
研究的目的:
- 通过在油湿碳酸盐岩中使用二甲基三甲基化物 (DTAB) 泛滥来研究油位移的孔尺度机制.
- 评估DTAB表面活性剂度高于临界菌度 (CMC) 对石油回收的影响.
- 了解湿度变化和界面张力降低在增强石油回收中的作用.
主要方法:
- 利用高分辨率的X射线微型计算机断层扫描 (微型CT) 来进行孔尺度可视化.
- 将盐水和DTAB表面活性剂连续注入到经过油改性碳酸盐样本中.
- 进行了基于图像的液体占用率,湿度,接触角度,接口区域,毛细血管压力和液体连接性的分析.
主要成果:
- DTAB洪水引发了从油湿到混合湿状态的过渡,接触角度和毛细血管压力的变化证明了这一点.
- 减少了面际张力和改变了湿透性,导致了显著的油脂回收,特别是在较小的毛孔和喉.
- 观察到增强的油脂回收,而不需要超低的界面张力.
结论:
- 多三甲基化物 (DTAB) 有效地提高复杂碳酸盐储库中的石油回收.
- 由吸附和疏水相互作用驱动的湿度改变是油分离的关键机制.
- 对于具有挑战性的地质构造,DTAB提供了一个潜在的成本效益高的第三级EOR策略.
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