Origins of Palaeozoic oils in the Tarim Basin: Evidence from sulfur isotopes and biomarkers
文献类型：期刊论文
| 作者 | Cai, Chunfang1; Zhang, Chunming2; Cai, Liulu1; Wu, Guanhui3; Jiang, Lei1; Xu, Zhiming4; Li, Kaikai1; Ma, Anlai5; Chen, Lixin3 |
| 刊名 | CHEMICAL GEOLOGY
 |
| 出版日期 | 2009-11-30 |
| 卷号 | 268期号:3-4页码:197-210 |
| 关键词 | Thermochemical sulfate reduction (TSR) Oil-source rock correlation Alkyl-thiolanes Organic sulfur delta S-34 Tarim Basin |
| ISSN号 | 0009-2541 |
| DOI | 10.1016/j.chemgeo.2009.08.012 |
| 文献子类 | Article |
| 英文摘要 | Crude oil, H2S and pyrite samples from Palaeozoic formations in the Tarim Basin have been analyzed for delta S-34 values together with oil samples for biomarkers, and fluid inclusions for chemical composition. to elucidate the origin of sulfur in the oil and to address potential applications in oil-source rock correlation. The results show that crude oil samples have sulfur contents from 0.02 to 2.47% and delta S-34 values from + 11.9 to + 28.2 parts per thousand. Non-degraded oils without associated H2S gas have delta S-34 values from + 11.9 to + 20.5 parts per thousand, and are relatively rich in C-28 alpha alpha alpha 20R sterane, aryl isoprenoids and/or gammacerane. The features are well-correlated with the Cambrian and Lower Ordovician source rocks with delta S-34 values from + 10.4 to + 19.4 parts per thousand. Non-degraded oils with associated H2S gas have delta S-34 values from + 15.1 to + 19.1 parts per thousand, close to the H2S (from + 15.0 to + 18.5 parts per thousand), suggesting that the H2S was incorporated into the oils, leading to the generation of 2-thiaadamantanes and likely alkyl-thiolanes in the oil with a delta S-34 value of + 18.5 parts per thousand. Heavily biodegraded oils have the highest sulfur contents, and show delta S-34 values from + 20.0 to + 28.2 parts per thousand, significantly heavier than those of any of the potential source rocks (- 15.3 to + 19.4 parts per thousand). Thus, it is likely that isotopically heavy sulfides have been incorporated into the biodegraded oils, resulting in delta S-34 values of the oils becoming closer to Cambrian and Ordovician age seawater sulfates. The sulfides may have originated from thermochemical sulfate reduction (TSR), as evidenced by the occurrence of H2S-rich fluid inclusions and late-stage and fracture-filling pyrite with delta S-34 values mainly from + 25 to + 34 parts per thousand in the Palaeozoic reservoirs. (C)2009 Elsevier B.V. All rights reserved. |
| WOS关键词 | THERMOCHEMICAL SULFATE REDUCTION ; SOURCE ROCK CORRELATIONS ; NW CHINA ; CRUDE OILS ; FLUID INCLUSIONS ; ARYL ISOPRENOIDS ; SICHUAN BASIN ; STABLE SULFUR ; PETROLEUM ; RESERVOIRS |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000272364300004 |
| 出版者 | ELSEVIER SCIENCE BV |
| 资助机构 | China National Major Basic Development Program(2006CB202304) ; China National Major Basic Development Program(2006CB202304) ; National Natural Sciences Foundation of China(40573034 ; National Natural Sciences Foundation of China(40573034 ; 40839906) ; 40839906) ; China National Major Basic Development Program(2006CB202304) ; China National Major Basic Development Program(2006CB202304) ; National Natural Sciences Foundation of China(40573034 ; National Natural Sciences Foundation of China(40573034 ; 40839906) ; 40839906) ; China National Major Basic Development Program(2006CB202304) ; China National Major Basic Development Program(2006CB202304) ; National Natural Sciences Foundation of China(40573034 ; National Natural Sciences Foundation of China(40573034 ; 40839906) ; 40839906) ; China National Major Basic Development Program(2006CB202304) ; China National Major Basic Development Program(2006CB202304) ; National Natural Sciences Foundation of China(40573034 ; National Natural Sciences Foundation of China(40573034 ; 40839906) ; 40839906) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/71400]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Cai, Chunfang |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 100029, Peoples R China 2.Yangtze Univ, Dept Geochem, Jinzhou 434023, Hubei, Peoples R China 3.Tarim Oilfield Co, PetroChina, Kuerle 841000, Xinjiang, Peoples R China 4.SW Petr Univ, Chengdu 610500, Peoples R China 5.CENOPEC, Inst Petr Explorat & Dev, Beijing 100083, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cai, Chunfang,Zhang, Chunming,Cai, Liulu,et al. Origins of Palaeozoic oils in the Tarim Basin: Evidence from sulfur isotopes and biomarkers[J]. CHEMICAL GEOLOGY,2009,268(3-4):197-210. |
| APA | Cai, Chunfang.,Zhang, Chunming.,Cai, Liulu.,Wu, Guanhui.,Jiang, Lei.,...&Chen, Lixin.(2009).Origins of Palaeozoic oils in the Tarim Basin: Evidence from sulfur isotopes and biomarkers.CHEMICAL GEOLOGY,268(3-4),197-210. |
| MLA | Cai, Chunfang,et al."Origins of Palaeozoic oils in the Tarim Basin: Evidence from sulfur isotopes and biomarkers".CHEMICAL GEOLOGY 268.3-4(2009):197-210. |
入库方式： OAI收割
来源：地质与地球物理研究所
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