Fundamental Investigation on a Foam-Generating Microorganism and Its Potential for Mobility Reduction in High-Permeability Flow Channels
Fundamental Investigation on a Foam-Generating Microorganism and Its Potential for Mobility Reduction in High-Permeability Flow Channels
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DOI：
10.3390/en15072344
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发表时间：
2022-03
期刊：
影响因子：
3.2
通讯作者：
Miu Ito;Y. Sugai
中科院分区：
文献类型：
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作者：
Miu Ito;Y. Sugai
本研究提出了一种新的泡沫EOR技术，使用铜绿假单胞菌产生的泡沫，并研究了微生物泡沫EOR的潜力，以改变高渗透多孔系统的渗透率。我们研究了氧气纳米气泡、二氧化碳纳米气泡和硫酸亚铁的浓度，以通过培养实验发现激活微生物泡沫产生的最佳水平。我们还阐明了微生物泡沫生成的行为和有助于泡沫生成的生物产品。通过填砂岩心驱油实验，评价了泡沫降低高渗透多孔体系渗透率的潜力。泡沫的生成随着纳米气泡数量的增加而变得更加活跃，但存在最佳的硫酸亚铁浓度。泡沫被鉴定为由微生物产生的蛋白质诱导的，这可以预期带来比表面活性剂诱导的泡沫多的几个优点。泡沫成功地将高渗透性填砂岩心的渗透率降低到其初始水平的一半。这些结果表明，微生物泡沫提高采收率具有降低高渗透孔隙系统渗透率和改善油藏渗透率非均质性的潜力。
This study proposed a novel foam EOR technique using Pseudomonas aeruginosa to generate the foam and investigated the potential of the microbial foam EOR to modify the permeability of a high-permeability porous system. We investigated oxygen nanobubble, carbon dioxide nanobubble and ferrous sulfate concentrations to discover the optimal levels for activating the foam generation of the microorganism through cultivation experiments. We also clarified the behavior of the microbial foam generation and the bioproducts that contribute to the foam generation. The potential of the foam to decrease the permeability of high-permeability porous systems was evaluated through flooding experiments using sand pack cores. The foam generation became more active with the increase in the number of nanobubbles, while there was an optimal concentration of ferrous sulfate for foam generation. The foam was identified as being induced by the proteins produced by the microorganism, which can be expected to bring about several advantages over surfactant-induced foam. The foam successfully decreased the permeability of high-permeability sand pack cores to half of their initial levels. These results demonstrate that the microbial foam EOR has the potential to decrease the permeability of high-permeability porous systems and improve the permeability heterogeneity in oil reservoirs.