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Formation of volatile organic sulfur compounds by low thermal maturation of source rocks: A geochemical proxy for natural gas

文献类型：期刊论文

作者Kutuzov, Ilya2; Xiao, Qilin3; Cai, Chunfang1; Amrani, Alon2
刊名MARINE AND PETROLEUM GEOLOGY
出版日期2023-12-01
卷号158页码:14
ISSN号0264-8172
关键词Compound specific sulfur isotope analysis Volatile organic sulfur compounds Thiols Thiophenes Natural gas Pyrolysis Hydrogen sulfide
DOI10.1016/j.marpetgeo.2023.106531
英文摘要Volatile organic sulfur compounds (VOSC) are trace components of natural gas that can provide substantial information regarding gas origins, migration, and key processes such as H2S generation and its occurrence in natural gas reservoirs. In the current study we demonstrate the applicability of VOSC as a proxy for gas-source rock correlations and identification of interactions between H2S and other natural gas components. We studied the molecular and isotopic compositions of VOSC formed during low-level thermal maturation (%Ro equivalent = 0.60-0.71) of six different immature source rocks covering a variety of kerogens (types I, II, II-S and III). Anhydrous pyrolysis experiments (300 degrees C, 72h) were performed on all the source rocks studied, and the produced gases were analyzed for their molecular compositions and compound specific sulfur isotopes of the various VOSC formed. The formed gases were either dominated by CH4 (32.2-49.9%) or CO2 (31.9-46.2%) and contained a variety of alkanes in the C2-C5 range. H2S formed in 6 out of 8 experiments at concentrations ranging from 0.6 to 4.3%. The results demonstrated formation of VOSC in all experiments, regardless of kerogen types or source rock lithologies. The formation of thiols (16-121.2 ppm) in the produced gas was restricted to those experiments that contained H2S. This indicates that thiols formation is limited to gas-phase interactions between H2S and hydrocarbons. In contrast, thiophenes formed in all experiments (14.9-1778.8 ppm) regardless of H2S presence. Thiols preserved the delta 34S signal of their associated H2S due to gas-phase interactions between the two, while thiophenes showed no interaction with the associated H2S and instead preserved the delta 34S signature of the bulk kerogen (within 3.5 parts per thousand on average) of each source rock. This work demonstrates the applicability of thiophenes to act as a gas-source rock proxy for natural gas and thiols as a proxy for identification of present or paleointeractions between natural gas and H2S.
WOS关键词THERMOCHEMICAL SULFATE REDUCTION ; PERMIAN LUCAOGOU FORMATION ; HYDROUS PYROLYSIS ; OIL-SHALE ; JUNGGAR BASIN ; EXPERIMENTAL SIMULATION ; HYDROCARBON GENERATION ; ORGANOSULFUR COMPOUNDS ; MASS-SPECTROMETRY ; KEROGEN
资助项目Simon Emmanuel (HUJI) ; Israeli Science Foundation[3195/19] ; BIRD Foundation Energy Center ; National Natural Science Foundation of China[41961144023] ; National Natural Science Foundation of China[42073066]
WOS研究方向Geology
语种英语
出版者ELSEVIER SCI LTD
WOS记录号WOS:001091790500001
资助机构Simon Emmanuel (HUJI) ; Simon Emmanuel (HUJI) ; Israeli Science Foundation ; Israeli Science Foundation ; BIRD Foundation Energy Center ; BIRD Foundation Energy Center ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Simon Emmanuel (HUJI) ; Simon Emmanuel (HUJI) ; Israeli Science Foundation ; Israeli Science Foundation ; BIRD Foundation Energy Center ; BIRD Foundation Energy Center ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Simon Emmanuel (HUJI) ; Simon Emmanuel (HUJI) ; Israeli Science Foundation ; Israeli Science Foundation ; BIRD Foundation Energy Center ; BIRD Foundation Energy Center ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Simon Emmanuel (HUJI) ; Simon Emmanuel (HUJI) ; Israeli Science Foundation ; Israeli Science Foundation ; BIRD Foundation Energy Center ; BIRD Foundation Energy Center ; National Natural Science Foundation of China ; National Natural Science Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/110689]  
专题地质与地球物理研究所_中国科学院油气资源研究重点实验室
通讯作者Amrani, Alon
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 100029, Peoples R China
2.Hebrew Univ Jerusalem, Inst Earth Sci, IL-91904 Jerusalem, Israel
3.Yangtze Univ, Key Lab Explorat Technol Oil & Gas Resources, Minist Educ, Wuhan 430100, Peoples R China
推荐引用方式
GB/T 7714		 Kutuzov, Ilya,Xiao, Qilin,Cai, Chunfang,et al. Formation of volatile organic sulfur compounds by low thermal maturation of source rocks: A geochemical proxy for natural gas[J]. MARINE AND PETROLEUM GEOLOGY,2023,158:14.
APA Kutuzov, Ilya,Xiao, Qilin,Cai, Chunfang,&Amrani, Alon.(2023).Formation of volatile organic sulfur compounds by low thermal maturation of source rocks: A geochemical proxy for natural gas.MARINE AND PETROLEUM GEOLOGY,158,14.
MLA Kutuzov, Ilya,et al."Formation of volatile organic sulfur compounds by low thermal maturation of source rocks: A geochemical proxy for natural gas".MARINE AND PETROLEUM GEOLOGY 158(2023):14.

入库方式： OAI收割

来源：地质与地球物理研究所

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