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首页> 美国卫生研究院文献>Frontiers in Microbiology >Temperature and injection water source influence microbial community structure in four Alaskan North Slope hydrocarbon reservoirs
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Temperature and injection water source influence microbial community structure in four Alaskan North Slope hydrocarbon reservoirs

机译：温度和注入水源影响阿拉斯加北坡四个油气藏的微生物群落结构

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A fundamental knowledge of microbial community structure in petroleum reservoirs can improve predictive modeling of these environments. We used hydrocarbon profiles, stable isotopes, and high-density DNA microarray analysis to characterize microbial communities in produced water from four Alaskan North Slope hydrocarbon reservoirs. Produced fluids from Schrader Bluff (24–27°C), Kuparuk (47–70°C), Sag River (80°C), and Ivishak (80–83°C) reservoirs were collected, with paired souredon-soured wells sampled from Kuparuk and Ivishak. Chemical and stable isotope data suggested Schrader Bluff had substantial biogenic methane, whereas methane was mostly thermogenic in deeper reservoirs. Acetoclastic methanogens (Methanosaeta) were most prominent in Schrader Bluff samples, and the combined δD and δ13C values of methane also indicated acetoclastic methanogenesis could be a primary route for biogenic methane. Conversely, hydrogenotrophic methanogens (e.g., Methanobacteriaceae) and sulfide-producing Archaeoglobus and Thermococcus were more prominent in Kuparuk samples. Sulfide-producing microbes were detected in all reservoirs, uncoupled from souring status (e.g., the non-soured Kuparuk samples had higher relative abundances of many sulfate-reducers compared to the soured sample, suggesting sulfate-reducers may be living fermentatively/syntrophically when sulfate is limited). Sulfate abundance via long-term seawater injection resulted in greater relative abundances of Desulfonauticus, Desulfomicrobium, and Desulfuromonas in the soured Ivishak well compared to the non-soured well. In the non-soured Ivishak sample, several taxa affiliated with Thermoanaerobacter and Halomonas predominated. Archaea were not detected in the deepest reservoirs. Functional group taxa differed in relative abundance among reservoirs, likely reflecting differing thermal and/or geochemical influences.
机译：石油储层中微生物群落结构的基础知识可以改善这些环境的预测模型。我们使用了碳氢化合物剖面，稳定同位素和高密度DNA芯片分析来表征四个阿拉斯加北坡油气储层采出水中的微生物群落。收集了来自Schrader Bluff（24–27°C），Kuparuk（47–70°C），Sag River（80°C）和Ivishak（80–83°C）储层的产出液，并有成对的酸化/非酸化从Kuparuk和Ivishak采样的井。化学和稳定的同位素数据表明，Schrader Bluff具有大量的生物成因甲烷，而甲烷在较深的储层中大部分是热成因的。在Schrader Bluff样品中，破口产甲烷菌（Methanosaeta）最为突出，甲烷的δD和δ 13 C值合计也表明，破产甲烷的产甲烷作用可能是生物甲烷的主要途径。相反，在Kuparuk样品中，氢营养型产甲烷菌（例如，甲烷杆菌科）和产生硫化物的古球藻和嗜热球菌更为突出。在所有储层中均检测到产生硫化物的微生物，且与酸状态无关（例如，与酸化样品相比，未酸化的Kuparuk样品的许多硫酸盐还原剂的相对丰度更高，这表明硫酸盐还原剂可能在硫酸盐发酵/同养状态下生活）是有限的）。与未注入酸的井相比，经过长期海水注入的硫酸根丰度导致酸蚀的依维沙克井中的Desulfonauticus，Desulfomicrobium和Desulfuromonas相对丰度更高。在非酸味的Ivishak样品中，与嗜热厌氧细菌和嗜盐单胞菌相关的几种分类单元占主导地位。在最深的储层中未发现古细菌。储层之间的功能群分类群相对不同，可能反映了不同的热和/或地球化学影响。

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