实验室规模的实验研究微生物增强的油回收在低透性核心使用酸盐细菌Paenibacillus mucilaginosus
Lei Li1, Chunhui Zhang1, Peidong Su1
1School of Chemical & Environmental Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China.
Microorganisms
|April 26, 2025
概括
像Paenibacillus mucilaginosus这样的酸盐细菌,通过随着时间的推移改进储特性,为微生物增强石油回收 (MEOR) 提供了一种新的方法. 这种方法通过矿物溶解增强了石油回收,而不会损害敏感的低透度核心.
科学领域:
- 微生物增强的石油回收 (MEOR)
- 地质微生物学的生物.
- 储水库工程 储水库工程
背景情况:
- 微生物增强石油回收 (MEOR) 通常使用生物表面活性剂或产生酸的细菌.
- 能够分解矿物质的酸盐细菌在很长一段时间内还没有被探索.
- 低透性的水库对传统的MEOR技术提出了独特的挑战.
研究的目的:
- 为了研究酸盐溶解细菌 (Paenibacillus mucilaginosus) 在低透性芯中更好的疗效.
- 为了比较P. mucilaginosus与已确定的MEOR细菌 (Pseudomonas aeruginosa和Bacillus licheniformis) 的性能.
- 阐明P. mucilaginosus增强石油回收的机制.
主要方法:
- 模拟实验使用低透性核心洪水.
- 对P. mucilaginosus,P. aeruginosa和B. licheniformis进行比较分析.
- 微计算机断层扫描 (μCT) 用于分析核心孔隙结构的变化.
- 分析碳化合物降解和储性质的变化 (多孔性,透性).
主要成果:
- 在长时间内,P. mucilaginosus实现了6.9%的油脂回收增强,相当于P. aeruginosa (7.9%) 和B. licheniformis (4.8%).
- 通过生物气候变化,P. mucilaginosus通过生物气候变化增加了1.4%的核心孔隙性和12.3mD的透性.
- μCT揭示了孔径分布的变化,有利于更大的孔径,以及中性pH下P. mucilaginosus对和碳化合物的最小降解.
结论:
- P. mucilaginosus通过生物溶解提供了一种独特的MEOR机制,通过生物溶解保持对酸敏感的低透性核心的完整性.
- 酸盐溶解细菌代表了一个有前途的新型微生物类别,适用于MEOR应用,特别是在具有挑战性的水库中.
- 早期或联合应用P. mucilaginosus与其他微生物可以最大限度地发挥其更好的潜力.
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