The Graptolite Biostratigraphy of the Ordovician Wulalike Formation from the Well Zhongping-1 in the Western Margin of the Ordos Basin

WANG Chuan-Shang; HU Yong; WEI Kai

doi:10.3969/j.issn.2097-0013.2024.03.007

2024 Vol. 40, No. 3

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WANG Chuan-Shang, HU Yong, WEI Kai. 2024. The Graptolite Biostratigraphy of the Ordovician Wulalike Formation from the Well Zhongping-1 in the Western Margin of the Ordos Basin. South China Geology, 40(3): 519-527. doi: 10.3969/j.issn.2097-0013.2024.03.007

Citation:

WANG Chuan-Shang, HU Yong, WEI Kai. 2024. The Graptolite Biostratigraphy of the Ordovician Wulalike Formation from the Well Zhongping-1 in the Western Margin of the Ordos Basin. South China Geology, 40(3): 519-527. doi: 10.3969/j.issn.2097-0013.2024.03.007

The Graptolite Biostratigraphy of the Ordovician Wulalike Formation from the Well Zhongping-1 in the Western Margin of the Ordos Basin

1.
Hubei Key Laboratory of Paleontology and Geological Environment Evolution, Wuhan Center, China Geological Survey （Geosciences Innovation Center of Central South China） , Wuhan 430205, Hubei, China
2.
College of Resources and Environment, Yangtze University, Wuhan 430100, Hubei, China

Received Date: 09 July 2024

Revised Date: 15 July 2024

Publish Date: 25 September 2024

Abstract

Abstract

The Well Zhongping-1 is the first borehole to achieve a breakthrough for the shale gas exploration on the Ordovician Wulalike Formation in the western margin of the Ordos Basin. The classification and correlation of the black shale for this borehole would be one of the key scientific problems in the successive evaluation of favorable shale gas exploration zones. The Nemagraptus gracilis biozone and Jiangxigraptus vagus biozone have been established in descending order in this borehole by the study on the graptolite fauna from the drill core. Compared with the coeval strata at the outcrop regions, the diachronous distribution pattern of the black shale in the Wulalike Formation has been revealed in the western margin of the Ordos Basin, which provides the accurate time scale for evaluation and optimization of the favorable shale gas exploration zones.
- the western margin of the Ordos Basin /
- Wulalike Formation /
- Well Zhongping-1 /
- graptolite zonation /
- black shale /
- diachroneity

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References

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