Origins and fates of H2S in the Cambrian and Ordovician in Tazhong area: Evidence from sulfur isotopes, fluid inclusions and production data

doi:10.1016/j.marpetgeo.2015.05.007

CORC > 地质与地球物理研究所 > 中国科学院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

	Origins and fates of H2S in the Cambrian and Ordovician in Tazhong area: Evidence from sulfur isotopes, fluid inclusions and production data
	Cai, Chunfang 1,2; Hu, Guoyi 3; Li, HongXia 1; Jiang, Lei 1; He, Wenxiang 2; Zhang, Baoshou 4; Jia, Lianqi 1; Wang, Tiankai 1
刊名	MARINE AND PETROLEUM GEOLOGY
	2015-11-01
卷号	67 页码:408-418
关键词	TSR H2S Oil Methane Sulfur isotope Carbon isotope Tarim Basin
DOI	10.1016/j.marpetgeo.2015.05.007
文献子类	Article
英文摘要	Gases, oils, solid bitumen samples and fluid inclusions were analyzed for chemical composition and delta C-13 and delta S-13 values, and production data were collated, to elucidate the origin and fates of the H2S in the Tazhong area. The H2S in the Ordovician was measured to have delta S-13 values from 12.1 parts per thousand to 23.4 parts per thousand, which are significantly lighter than the counterpart in the Cambrian (33.0 parts per thousand), indicating that the H2S did not migrate from the Cambrian, but may have been derived from thermochemical sulfate reduction in situ, as partially supported by C-12-rich CO2 in fluid inclusions and TSR calcites with delta C-13 values from - 3.6 parts per thousand to -17.7 parts per thousand in the Ordovician. The H2S rich gas subsequently mixed with H2S-poor, C-13 rich methane-dominated gas as indicated by the roughly negative correlations of H2S content to dryness and gas/oil ratio, and CH4 from fluid inclusions having delta C-13 values 1.2-3.6 parts per thousand lighter than the associated free gas. The H2S has been dissolved in formation water, precipitated as pyrite and incorporated into oils and solid bitumens, resulting in the generation of alkylthiolanes, alkylthiols and alkyl 2-thiaadamantanes, and increase in delta S-13 values and S/C ratios of the solid bitumen. The content of H2S produced from the water intervals or petroleum-water transition zones is significantly contributed from exsolved gas and thus higher than that of the gas-cap gas in the reservoirs. Thus, H2S contents cannot be used to indicate TSR extents in the Ordovician. However, in the Cambrian, whole oil and saturates show positive shifts in delta C-13 values with increasing H2S contents, indicating that the H2S in the Cambrian was derived from TSR by liquid hydrocarbons. (C) 2015 Elsevier Ltd. All rights reserved.
WOS关键词	THERMOCHEMICAL SULFATE REDUCTION ; JURASSIC SMACKOVER FORMATION ; EAST SICHUAN BASIN ; TARIM BASIN ; CARBONATE RESERVOIRS ; CRUDE-OIL ; CHINA ; GAS ; PETROLEUM ; HYDROCARBON
WOS研究方向	Geology
语种	英语
WOS记录号	WOS:000366066500027
资助机构	China National Funds for Distinguished Young Scientists(41125009) ; China National Funds for Distinguished Young Scientists(41125009) ; Special Major Project on Petroleum Study(2011ZX05008-003) ; Special Major Project on Petroleum Study(2011ZX05008-003) ; China National Funds for Distinguished Young Scientists(41125009) ; China National Funds for Distinguished Young Scientists(41125009) ; Special Major Project on Petroleum Study(2011ZX05008-003) ; Special Major Project on Petroleum Study(2011ZX05008-003)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/62157]
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
作者单位	1.Chinese Acad Sci, Key Lab Petr Resources Res, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Yangtze Univ, Sch Water Resource & Environm, Minist Educ, Key Lab Explorat Technol Oil & Gas Resources, Wuhan 430100, Hubei, Peoples R China 3.PetroChina, Res Inst Petr Explorat & Dev, Beijing 100083, Peoples R China 4.PetroChina, Tarim Oilfield Co, Res Inst Petr Explorat & Dev, Korla 841000, Xinjiang, Peoples R China
推荐引用方式 GB/T 7714	Cai, Chunfang,Hu, Guoyi,Li, HongXia,et al. Origins and fates of H2S in the Cambrian and Ordovician in Tazhong area: Evidence from sulfur isotopes, fluid inclusions and production data[J]. MARINE AND PETROLEUM GEOLOGY,2015,67:408-418.
APA	Cai, Chunfang.,Hu, Guoyi.,Li, HongXia.,Jiang, Lei.,He, Wenxiang.,...&Wang, Tiankai.(2015).Origins and fates of H2S in the Cambrian and Ordovician in Tazhong area: Evidence from sulfur isotopes, fluid inclusions and production data.MARINE AND PETROLEUM GEOLOGY,67,408-418.
MLA	Cai, Chunfang,et al."Origins and fates of H2S in the Cambrian and Ordovician in Tazhong area: Evidence from sulfur isotopes, fluid inclusions and production data".MARINE AND PETROLEUM GEOLOGY 67(2015):408-418.