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Conversion of petroleum to methane by the indigenous methanogenic consortia for oil recovery in heavy oil reservoir

机译:本地甲烷生成财团将石油转化为甲烷,以回收重油藏中的石油

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摘要

Microbial enhanced oil recovery has been well acknowledged and becoming an advanced technology for oil recovery. Compared with current techniques, a newly technical strategy of the in-situ heavy oil gasification to methane for oil viscosity reduction was proposed and successfully proved via enriching the methanogenic consortia from the brine of oil reservoir with heavy oil as carbon source. During 200 days anaerobic culturing, 2.34 g of heavy oil was degraded coupling with 1514 mu mol of methane production. Phylogenetic diversity analysis showed that the enriched consortia composed with sequences affiliated with the Firmicutes, Proteobacteria, Deferribacteres and Bacteroidetes. The recovered archaeal phylotypes were close to the Methanobacteriales and Methanosarcinales, which could convert the produced small molecules (formic acid and acetic acids) to methane. The viscosity of the degraded heavy oil was reduced by 72.45% at 20 MPa after the dissolution of the produced methane. Core flooding tests finally showed that the oil degradation and methane production by the enriched methanogenic consortia made 14.7% of the tertiary enhanced oil recovery. These results demonstrated a promising and practical strategy of microbial technology on oil recovery by activating the methanogens in heavy oil reservoir. (C) 2016 Elsevier Ltd. All rights reserved.
机译:微生物提高采油率已得到公认,并已成为采油的先进技术。与现有技术相比,提出了一种新的将重油气化成甲烷来降低油黏度的新技术策略,并通过以重油为碳源富集了储油层卤水中的产甲烷菌团而得到了成功证明。在200天的厌氧培养中,降解了2.34 g的重油,并产生了1514μmol的甲烷。系统发育多样性分析表明,该富集的财团由与Firmicutes,Proteobacteria,Deferribacteres和Bacteroidetes相关的序列组成。回收的古细菌系统型接近于甲烷细菌和甲烷芥,它们可以将产生的小分子(甲酸和乙酸)转化为甲烷。在产生的甲烷溶解后,降解的重油的粘度在20 MPa下降低了72.45%。岩心驱油测试最终表明,富集甲烷的财团对石油的降解和甲烷的产生占三次采油量的14.7%。这些结果证明了通过活化重油储层中的产甲烷菌来利用微生物技术来采油的有前途的实用策略。 (C)2016 Elsevier Ltd.保留所有权利。

著录项

  • 来源
    《Applied Energy》 |2016年第1期|646-655|共10页
  • 作者单位

    Power Environm Energy Res Inst, Covina, CA 91722 USA;

    Chinese Acad Sci, Inst Porous Flow & Fluid Mech, Langfang 065007, Peoples R China;

    Chinese Acad Sci, Inst Porous Flow & Fluid Mech, Langfang 065007, Peoples R China;

    SINOPEC, Petr Explorat & Prod Res Inst, Beijing, Peoples R China;

    Yangtze Univ, Coll Chem & Environm Engn, Beijing, Peoples R China;

    Power Environm Energy Res Inst, Covina, CA 91722 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Heavy oil; Methanogenics; Biodegradation; Methane; Viscosity; Oil recovery;

    机译:重油产甲烷作用生物降解甲烷粘度采油;
  • 入库时间 2022-08-18 00:08:15

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