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Open Access

Characteristics of source rocks and hydrocarbon resource prospects of Permian Linxi Formation in northern Songliao Basin

Haihua ZHANG1,2, Shufeng GENG3( ), Jian ZHANG2, Lei SUN2, Shuwang CHEN2, Fei SU2, Yuejuan ZHENG2, Dejun ZHANG2, Xiongfei BIAN2
CAS Key Laboratory of Crust-Mantle Materials and Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China
Shenyang Center of China Geological Survey, Shenyang 110034, China
Liaoning Fourth Geological Team Limited Liability Company, Fuxin 123000, Liaoning, China
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Abstract

In order to explore the oil and gas resource prospects in the Carboniferous–Permian strata in northern Songliao Basin, geological survey boreholes (HFD 1 and HFD 2) were drilled in the area, and thick dark mudstone and slate of the Upper Permian Linxi Formation were encountered. Source rock geochemistry analysis of the samples show that the organic matter abundance of the Upper Permian Linxi Formation source rock in the north of Songliao Basin is high, which belongs to medium to good source rock. The organic matter belongs to type Ⅱ, and it is in the evolution stage of highly mature to over mature. The Pr/Ph ratios of the source rocks range from 0.16 to 0.93, with an average of 0.53. The phytane predominance is obvious, and indicates a strong reduction to reduction sedimentary environment, which is conducive to the preservation of organic matter. Pr/nC17, Ph/nC18 and C27–C28–C29 regular steranes indicate that the organic matter was derived from a mixture of vascular plants and aquatic organisms such as algae, and is mainly contributed by phytoplankton. Through comprehensive analysis, it is considered that the source rocks of the Upper Permian Linxi Formation in northern Songliao Basin have entered the gas generation stage and have shale gas exploration prospects.

Keywords

biomarkernorthern Songliao BasinLate PermianLinxi Formationsource rock

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Global Geology
Volume 25 Issue 3,
August 2022
Pages 159-173
DOI: 10.3969/j.issn.1673-9736.2022.03.03
Cite this article:
ZHANG H, GENG S, ZHANG J, et al. Characteristics of source rocks and hydrocarbon resource prospects of Permian Linxi Formation in northern Songliao Basin. Global Geology, 2022, 25(3): 159-173. https://doi.org/10.3969/j.issn.1673-9736.2022.03.03

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Received: 11 May 2022
Accepted: 28 May 2022
Published: 25 August 2022
© 2022 GLOBAL GEOLOGY
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