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首页> 外文期刊>Environmental Science & Technology >Microbially Enhanced Oil Recovery by Sequential Injection of Light Hydrocarbon and Nitrate in Low- And High-Pressure Bioreactors
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Microbially Enhanced Oil Recovery by Sequential Injection of Light Hydrocarbon and Nitrate in Low- And High-Pressure Bioreactors

机译：通过在低压和高压生物反应器中顺序注入轻烃和硝酸盐来提高微生物的采收率

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摘要

Microbially enhanced oil recovery (MEOR) often involves injection of aqueous molasses and nitrate to stimulate resident or introduced bacteria. Use of light oil components like toluene, as electron donor for nitrate-reducing bacteria (NRB), offers advantages but at 1-2 mM toluene is limiting in many heavy oils. Because addition of toluene to the oil increased reduction of nitrate by NRB, we propose an MEOR technology, in which water amended with light hydrocarbon below the solubility limit (5.6 mM for toluene) is injected to improve the nitrate reduction capacity of the oil along the water flow path, followed by injection of nitrate, other nutrients (e.g., phosphate) and a consortium of NRB, if necessary. Hydrocarbon- and nitrate-mediated MEOR was tested in low- and high-pressure, water-wet sandpack bioreactors with 0.5 pore volumes of residual oil in place (ROIP). Compared to control bioreactors, those with 11-12 mM of toluene in the oil (gained by direct addition or by aqueous injection) and 80 mM of nitrate in the aqueous phase produced 16.5 ± 4.4% of additional ROIP (N = 10). Because toluene is a cheap commodity chemical, HN-MEOR has the potential to be a cost-effective method for additional oil production even in the current low oil price environment.
机译：微生物提高采油量（MEOR）通常涉及注入糖蜜水溶液和硝酸盐以刺激驻留或引入的细菌。使用轻油成分（如甲苯）作为减少硝酸盐的细菌（NRB）的电子供体具有优势，但在1-2 mM的甲苯中，甲苯在许多重油中受到限制。因为向油中添加甲苯增加了NRB还原硝酸盐的能力，所以我们提出了MEOR技术，其中注入了溶解度低于溶解度极限（甲苯为5.6 mM）的轻烃改性的水，以提高油沿硝酸盐的硝酸盐还原能力。水流路径，然后注入硝酸盐，其他营养物质（例如磷酸盐）和NRB财团（如有必要）。碳氢化合物和硝酸盐介导的MEOR在低压和高压水湿式沙堆生物反应器中进行了测试，其中有0.5孔体积的残留油（ROIP）。与对照生物反应器相比，油中具有11-12 mM甲苯（通过直接添加或通过水注入获得）和水相中具有80 mM硝酸盐的生物反应器产生了16.5±4.4％的附加ROIP（N = 10）。由于甲苯是一种廉价的商品化学品，因此即使在当前的低油价环境下，HN-MEOR仍可能成为一种经济高效的方法来增加石油产量。

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  • 来源
    《Environmental Science & Technology》 |2015年第20期|12594-12601|共8页
  • 作者

    Fatma Gassara; Navreet Suri; Paul Stanislav; Gerrit Voordouw;

  • 作者单位

    Petroleum Microbiology Research Group, Department of Biological Sciences, University of Calgary, 2500 University NW, Calgary, Alberta T2N 1N4, Canada;

    Petroleum Microbiology Research Group, Department of Biological Sciences, University of Calgary, 2500 University NW, Calgary, Alberta T2N 1N4, Canada;

    Petroleum Microbiology Research Group, Department of Biological Sciences, University of Calgary, 2500 University NW, Calgary, Alberta T2N 1N4, Canada;

    Petroleum Microbiology Research Group, Department of Biological Sciences, University of Calgary, 2500 University NW, Calgary, Alberta T2N 1N4, Canada;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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