国家冰川冻土沙漠科学数据中心

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名称	Sulfate sources of thermochemical sulfate reduction and hydrogen sulfide distributions in the Permian Changxing and Triassic Feixianguan formations, Sichuan Basin, SW China
科技资源标识	CSTR:11738.14.NCDC.XDA14.PP5963.2024
DOI	https://doi.org/10.1016/j.marpetgeo.2022.105892
数据共享方式	开放下载
摘要	The sulfate sources of thermochemical sulfate reduction (TSR) and hydrogen sulfide (H2S) distributions in the Permian Changxing (P2c) and Triassic Feixianguan formations (T1f) in the Sichuan Basin were investigated using geochemical and carbon isotopic data for gases, and sulfur isotopic data for solid bitumen, H2S, and anhydrite. The concentration of H2S (>5.0%) is relatively high, and the δ34S values of the H2S are significantly higher than those of the Permian source rock kerogen, suggesting a TSR origin for the H2S. The δ13C values of the methane and ethane do not increase as the gas souring index (H2S/(H2S+ ΣCn)) increases, and the δ34S values of the H2S are significantly lower than those of the solid bitumen, suggesting mainly liquid hydrocarbon dominated-TSR. The δ34S values of the solid bitumen and H2S in the Puguang gas field in the eastern platform are significantly lower than those in the Yuanba gas field in the western platform, and the sulfates for the TSR were most likely derived from the Early and Late T1f evaporative seawater, respectively. The sulfates required for TSR were most likely enriched during dolomitization based on the positive relationship between the H2S concentrations and the thickness of the dolostone reservoirs. The H2S distributions were mainly controlled by the sulfate distributions and the paleo-oil accumulations. The edges of the eastern and western platforms in the Kaijiang- Liangping trough, which were favorable for dolomitization and paleo-oil accumulations, are the most likely H2S-enriched areas in the Sichuan Basin.
学科分类	170.50
关键词	Thermochemical sulfate reduction Hydrogen sulfide Solid bitumen Sulfurisotope fractionation Changxing Formation Feixianguan Formation Sichuan Basin
作者	Pingping Li,Bisong Li,Jinbao Duan,Yizhen Zhao,Huayao Zou,Fang Hao
数据量	12.2 MiB
论文类型：	journal
论文网址：	https://www.sciencedirect.com/science/article/pii/S0264817222003701
期刊名称：	Marine and Petroleum Geology
出版时间：	2022-11-01

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数据引用

Pingping Li,Bisong Li,Jinbao Duan,Yizhen Zhao,Huayao Zou,Fang Hao. Sulfate sources of thermochemical sulfate reduction and hydrogen sulfide distributions in the Permian Changxing and Triassic Feixianguan formations, Sichuan Basin, SW China. 国家冰川冻土沙漠科学数据中心(http://www.ncdc.ac.cn), 2024. https://cstr.cn/CSTR:11738.14.NCDC.XDA14.PP5963.2024.

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本作品采用知识共享署名 4.0 国际许可协议进行许可。

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项目信息详情

项目名称：深层油气形成与分布预测
项目编号：XDA14010000
项目类别：中国科学院战略性先导科技专项（A类）