• 责任者：Wei Xiaofang (State Key Laboratory of EOR ; Research Institute of Petroleum Exploration & Development ; CNPC ; Beijing 100083 ; China) ; Luo Yijng
• 刊名：Advances in Earth Science
• 出版年：2011
• 卷期：26(5)
• 关键词：油气藏 ; oil and gas reservoir ; 二氧化碳 ; carbon dioxide ; 甲烷 ; methane
• 页码：p.499-506
• 图表：2 illus., 1 table, 77 refs.
• 分类号：1003
• issnNo：ISSN1001-8166
• isbnNo：CN62-1091/P

 The bioconversion of CH₄ from the stored CO₂ is a biotechnological solution that the injected CO₂ is metabolized by indigenous microbes in depleted oil or gas reservoirs to produce CH₄ by CO₂ bioreduction pathway. It is potential applied and promising technology due to its environmental friendship for CO₂ storage and sequestration, renewable energy of biogas CH₄, extended oil and gas reservoirs development period,and the potential profit for enhanced gas or oil recovery. The CO₂ Capture & Storage project and microbial diversity of reservoirs offer the solution feasibility. Hydrogenotrophic mesophilic or thermophilic methanogens are known to be common inhabitants in slightly saline formation water in oil and gas reservoirs. The distribution of CO₂/H₂ methanongens of biogas reservoirs changes with diagenetic stages. It has been shown that CO₂ can be potentially bioconverted to CH₄ in reservoirs under certain conditions. However, oil and gas reservoirs are complicated systems and the bioconversion is constrained by the relationships among the methanogens, fermentative bacteria and hydrogen-producing bacteria. The methanogen community structure and the co-metabolization and competition between the two communities of Sulfate Reduction Bacteria (SRB) and methanogens may also impact the CO₂ reduction. Compared to the discovered knowledge that CO₂ bioreduction pathway is permissible, the process may be quite complicated to be realized in reservoirs. It is difficult to realize the CO₂ bioreduction pathway without synthetic H2 supply. It is still a big challenge for both microbiologists and petroleum engineers to realize CH₄ bioconversion from CO₂ by parameters control in reservoirs. At present, the CO₂ reduction research is at experimental stage in the laboratory, the breakthrough is to activate the suited reservoirs’ microorganism consortium to realize the CH₄ bioconversion in right way, to probe the profitable CH₄ bioconversion rate and production velocity. Though the solution of CH₄ bioconversion from injected CO₂ in depleted oil and gas reservoirs is a fresh technique with less than ten years research history, it is believed that it is quite promising and will be applied for renewable energy and CO₂ sequestration in the near future.