Geochemical characteristics of source rock from Upper Permian Longtan Formation in Sichuan Basin

被引：0

作者：

Wei, Zhi-Fu ^{[1
]}

Wang, Yong-Li ^{[1
]}

Wu, Chen-Jun ^{[1
]}

Wu, Bao-Xiang ^{[1
]}

Sun, Ze-Peng ^{[1
]}

Li, Sheng-Xi ^{[2
]}

Wei, Wei ^{[2
]}

机构：

[1] Key Laboratory of Petroleum Resources, Gansu Province/Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Lanzhou

[2] The 2nd Institute of Geology and Mineral Exploration, Lanzhou

来源：

Natural Gas Geoscience | 2015年 / 26卷 / 08期

关键词：

Geochemical characteristics; Shale; Sichuan Basin; Upper Permian Longtan Formation;

D O I：

10.11764/j.issn.1672-1926.2015.08.1613

中图分类号：

学科分类号：

摘要：

Through geochemical analysis of core and outcrop source rocks from the Upper Permian Longtan Formation in Sichuan Basin, organic matter type and redox depositional conditions were discussed through organic carbon and biomarker characteristics. The results show that the content of TOC and TOS has fluctuation in the profile, showing obvious heterogeneity. The n-alkanes in coal and carbonaceous mudstone of Upper Permian Longtan Formation are mainly unimodally distributed with relatively high abundance of high carbon number n-alkanes. However, the n-alkanes in shale of Upper Permian Longtan Formation are mainly bimodally distributed with phytanic advantage, and the main peak of the front mode was at nC17, in contrast, the main peak of the back mode was at nC25 or nC27. These results indicate that the organic matter in Longtan shale is mainly of aquatic and continental organic matter input, whereas the organic matter in Longtan coal and mudstone are terrestrial organic matter input. ©, 2015, Science Press. All right reserved.

引用

页码：1613 / 1620

页数：7

共 15 条

[1]

Zhang X., Li Y., Lu H., Et al., Relationship between organic matter characteristics and depositional environment in the Silurian Longmaxi Formation in Sichuan Basin, Journal of China Coal Society, 38, 5, pp. 851-856, (2013)

[2]

Dong D., Gao S., Huang J., Et al., A discussion on the shale gas exploration & development prospect, Natural Gas Industry, 34, 12, pp. 1-15, (2014)

[3]

Jarvie D.M., Hill R.J., Ruble T.E., Et al., Unconventional shale-gas systems: The Mississippian Barnett Shale of north-central Texas as one model for thermogenic shale-gas assessment, AAPG Bulletin, 91, 4, pp. 475-499, (2007)

[4]

Zou C., Dong D., Yang H., Et al., Conditions of shale gas accumulation and exploration practices in China, Natural Gas Industry, 31, 12, pp. 26-39, (2011)

[5]

Jia C., Zheng M., Zhang Y., Unconventional hydrocarbon resources in China and the prospect of exploration and development, Petroleum Exploration and Development, 39, 2, pp. 129-136, (2012)

[6]

Li X., Zhao P., Sun J., Et al., Study on the accumulation conditions of shale gas from the Lower Paleozoic in the south region of Sichuan Basin, International Journal of Coal Science & Technology, 38, 5, pp. 865-867, (2013)

[7]

Wei G., Yang W., Xie W., Et al., Formation conditions, accumulation models and exploration direction of large gas fields in Sinian-Cambrian, Sichuan Basin, Natrural Gas Geoscience, 26, 5, pp. 785-795, (2015)

[8]

Deng K., Formation and evolution of Sichuan Basin and domains for oil and gas exploration, Natural Gas Industry, 12, 5, pp. 7-12, (1992)

[9]

Liu Q., Jin Z., Gao B., Et al., Characterization of gas pyrolysates from different types of permian source rocks in Sichuan Basin, Natrural Gas Geoscience, 21, 5, pp. 700-704, (2010)

[10]

Zhang J., Li X., Liu Y., Et al., Longtan Formation shale gas reservoiring conditions and favorable region analysis in southern Sichuan area, Coal Geology of China, 26, 2, pp. 1-6, (2014)

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