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  2. 地质与地球物理研究所
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  4. 中国科学院新生代地质与环境重点实验室
Geochemical evidence for secondary microbial gas in deep hot reservoirs of the Tarim Basin

文献类型：期刊论文

作者Wang, Daowei1,2; Cai, Chunfang2,3; Yun, Lu4; Cao, Zicheng4; Zhang, Jun5; Qi, Yu2; Liu, Jingyan1; Jiang, Ziwen2; Hu, Yongjie6
刊名CHEMICAL GEOLOGY
出版日期2022-01-05
卷号587页码:12
关键词Secondary microbial gas Biodegradation Methanogenesis Mixing Tarim Basin
ISSN号0009-2541
DOI10.1016/j.chemgeo.2021.120630
英文摘要It is hard to determine secondary microbial gas from deep burial reservoirs with multiple generations of petroleum charge. Herein, oils at depths from 5000 m to 6500 m in the Ordovician carbonate reservoirs, Tarim basin, are found to have been biodegraded to secondary microbial gas. These oils experienced severe biodegradation and thus contain abundant 25-norhopanes and 17-nortricyclic terpanes. The associated gases have methane delta C-13(1) from 51.9 parts per thousand to 47.3% and delta H-2(1) from 327.8 parts per thousand to 192.4 parts per thousand, and CO2 delta C-13(CO2) from 0.7 parts per thousand to +15.3 parts per thousand. These features suggest that the gases are secondary microbial gas, generated predominantly via CO2 reduction with preferential reduction of C-13-depleted CO2 and contribution of methane hydrogen from formation water in closed environments. The secondary microbial gas may have generated from biodegradation of oils at reservoir temperatures of about <75 degrees C during the Late Permian, and has subsequently mixed with a later charge of non-biodegraded oils and wet gas during the Late Cretaceous. Consequently, the present gas shows relatively low dryness (C-1/Sigma C1-4 < 0.87) and has varied delta C-13(1) and delta H-2(1) values in methane. The study implies that the signatures of secondary microbial gas can easily be masked by thermogenic gas and thus more secondary microbial gas has yet to be identified.
WOS关键词BIOGENIC METHANE ; OIL-FIELD ; ORDOVICIAN CARBONATES ; FORMATION WATERS ; NATURAL GASES ; TABEI UPLIFT ; HEAVY OILS ; BIODEGRADATION ; PETROLEUM ; ACCUMULATION
资助项目National Natural Science Foundation of China[41730424] ; National Natural Science Foundation of China[4181101560] ; Ministry of Science and Technology of SINOPEC[P20063-1]
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000720395400009
出版者ELSEVIER
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Ministry of Science and Technology of SINOPEC ; Ministry of Science and Technology of SINOPEC ; Ministry of Science and Technology of SINOPEC ; Ministry of Science and Technology of SINOPEC ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Ministry of Science and Technology of SINOPEC ; Ministry of Science and Technology of SINOPEC ; Ministry of Science and Technology of SINOPEC ; Ministry of Science and Technology of SINOPEC ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Ministry of Science and Technology of SINOPEC ; Ministry of Science and Technology of SINOPEC ; Ministry of Science and Technology of SINOPEC ; Ministry of Science and Technology of SINOPEC ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Ministry of Science and Technology of SINOPEC ; Ministry of Science and Technology of SINOPEC ; Ministry of Science and Technology of SINOPEC ; Ministry of Science and Technology of SINOPEC
源URL[http://ir.iggcas.ac.cn/handle/132A11/103846]  
专题地质与地球物理研究所_中国科学院新生代地质与环境重点实验室
通讯作者Cai, Chunfang
作者单位1.China Univ Geosci Beijing, Sch Energy Resources, Beijing 100083, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China
3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
4.SINOPEC, Northwest Petr Co, Urumqi 830011, Peoples R China
5.SINOPEC, Res Inst Petr Explorat & Dev, Beijing 100728, Peoples R China
6.SINOPEC, Int Petr Explorat & Prod Corp, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Daowei,Cai, Chunfang,Yun, Lu,et al. Geochemical evidence for secondary microbial gas in deep hot reservoirs of the Tarim Basin[J]. CHEMICAL GEOLOGY,2022,587:12.
APA Wang, Daowei.,Cai, Chunfang.,Yun, Lu.,Cao, Zicheng.,Zhang, Jun.,...&Hu, Yongjie.(2022).Geochemical evidence for secondary microbial gas in deep hot reservoirs of the Tarim Basin.CHEMICAL GEOLOGY,587,12.
MLA Wang, Daowei,et al."Geochemical evidence for secondary microbial gas in deep hot reservoirs of the Tarim Basin".CHEMICAL GEOLOGY 587(2022):12.

入库方式： OAI收割

来源：地质与地球物理研究所

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