Study on the Mechanism of Organic Matter Enrichment in Early Cambrian Marine Shales in the Lower Yangtze Area, South China: An Example Using Well JXY1

Joint Authors

Wen, Ming
Liu, Weiwei
Huang, Yizhou
Liu, Xiaoxue
Zhong, Li
Cheng, Sihong
Li, Bin
Zhang, Kun
Hou, Mingcai
Xia, Qingsong
Liu, Yongyang
Yuan, Muhe
Yao, Yue
Wang, Xin
Peng, Jun

Source

Geofluids

Issue

Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-11, 11 p.

Publisher

Hindawi Publishing Corporation

Publication Date

2020-08-25

Country of Publication

Egypt

No. of Pages

11

Main Subjects

Physics

Abstract EN

The abundance of organic matter in shales, which has a direct effect on the hydrocarbon generation potential of shales, is an important organic geochemical parameter for evaluating shale gas reservoirs.

The total organic carbon content (TOC content) in shale is controlled by the abundance of original sedimentary organic matter.

Therefore, it is very important to study the mechanism of organic matter enrichment in shale.

In this paper, the Lower Cambrian marine shales from the Lower Yangtze region are selected as the research subject, most of which originate from a typical area well called Well JXY1.

The degree of pyritization (DOP) is used to characterize the redox environment of the water body, while the P/Al ratio is used to analyze the biological productivity of paleoseawater.

The paleosalinity of seawater is calculated via carbon and oxygen isotope analysis.

In addition, the early Cambrian hydrothermal activities were studied by using core description; Si, Al, Fe, and Mn elemental analysis; and oxygen isotope calculations.

The results show that during the early Cambrian Wangyinpu sedimentary period, the seawater was an anaerobic water body with H2S, and the oxygen concentration was approximately 0 mL/L.

In the middle stages of the Wangyinpu sedimentary period, the water body had the strongest reducibility and the highest biological productivity.

Moreover, the paleoocean in this period between the Yangtze plate and the Cathaysian plate was greatly affected by hydrothermal activities, with temperatures ranging from 90°C to 120°C.

Active hydrothermal activities promoted high biological productivity and an anaerobic environment, both of which were conducive to the preservation and enrichment of organic matter, resulting in extremely high TOC content in the Wangyinpu shales (from 6.5% to approximately 16%).

American Psychological Association (APA)

Liu, Weiwei& Peng, Jun& Wen, Ming& Wang, Xin& Liu, Xiaoxue& Huang, Yizhou…[et al.]. 2020. Study on the Mechanism of Organic Matter Enrichment in Early Cambrian Marine Shales in the Lower Yangtze Area, South China: An Example Using Well JXY1. Geofluids،Vol. 2020, no. 2020, pp.1-11.
https://search.emarefa.net/detail/BIM-1159418

Modern Language Association (MLA)

Wang, Xin…[et al.]. Study on the Mechanism of Organic Matter Enrichment in Early Cambrian Marine Shales in the Lower Yangtze Area, South China: An Example Using Well JXY1. Geofluids No. 2020 (2020), pp.1-11.
https://search.emarefa.net/detail/BIM-1159418

American Medical Association (AMA)

Liu, Weiwei& Peng, Jun& Wen, Ming& Wang, Xin& Liu, Xiaoxue& Huang, Yizhou…[et al.]. Study on the Mechanism of Organic Matter Enrichment in Early Cambrian Marine Shales in the Lower Yangtze Area, South China: An Example Using Well JXY1. Geofluids. 2020. Vol. 2020, no. 2020, pp.1-11.
https://search.emarefa.net/detail/BIM-1159418

Data Type

Journal Articles

Language

English

Notes

Includes bibliographical references

Record ID

BIM-1159418