A Study on Hydrocarbon Generation Capacity of Graptolite in Marine Hydrocarbon Source Rocks in Southern China

Qin WANG; Men-hui QIAN; Qi-gui JIANG; Yun-feng YANG; Borjigin TENGER

doi:10.15898/j.cnki.11-2131/td.201611170173

Rock and Mineral Analysis > 2017 > 36(3): 258-264. > DOI: 10.15898/j.cnki.11-2131/td.201611170173

Qin WANG, Men-hui QIAN, Qi-gui JIANG, Yun-feng YANG, Borjigin TENGER. A Study on Hydrocarbon Generation Capacity of Graptolite in Marine Hydrocarbon Source Rocks in Southern China[J]. Rock and Mineral Analysis, 2017, 36(3): 258-264. DOI: 10.15898/j.cnki.11-2131/td.201611170173

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A Study on Hydrocarbon Generation Capacity of Graptolite in Marine Hydrocarbon Source Rocks in Southern China

Qin WANG^1,2,3,4,,
Men-hui QIAN^1,2,3,4, ,,
Qi-gui JIANG^1,2,3,4,
Yun-feng YANG^1,2,3,4,
Borjigin TENGER^1,2,3,4

1.
State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Wuxi 214126, China
2.
State Energy Center for Shale Oil Research and Development, Wuxi 214126, China
3.
Key Laboratory of Hydrocarbon Accumulation, SINOPEC, Wuxi 214126, China
4.
Wuxi Research Institute of Petroleum Geology, SINOPEC, Wuxi 214151, China

More Information

Received Date: November 16, 2016
Revised Date: May 03, 2017
Accepted Date: May 29, 2017
Published Date: May 31, 2017

Abstract

Highlights
· The pure graptolite from black graptolite shale was selected as the study object.

· The main pyrolysis products are shale gas and light oil.

· The pure graptolite is similar to type-Ⅲ organic matter.

ABSTRACT

The common development of graptolite in marine shale of Southern China has a close relationship with the formation of marine shale gas, but whether graptolite has hydrocarbon generating ability of shale gas has not been directly confirmed by relevant experiments. In this study, pure graptolite from black graptolite shale was selected and the graptolite sample was hand-picked for the experimental study on pyrolysis hydrocarbon generation. The results show that the graptolite is a good parent material. The carbon content of the graptolite is high, accounting for most carbon sources of graptolite shale. The main products of pyrolysis hydrocarbon generation are shale gas and light oil, which accounts for more than 94% of the total hydrocarbon generation products, whereas the shale gas accounts for 54%. The pyrolysis product is similar to that between type-Ⅲ organic matter (OM) and type-Ⅱ OM is more similar to that of type-Ⅲ OM, which is mainly gaseous hydrocarbon products. The hydrocarbon generation ability of graptolite may be higher during thermal maturation process, which is closely related to the genesis of widespread shale gas in Southern China at present.
- graptolite shale,
- Pyrolysis-Gas Chromatography,
- hydrocarbon generating potential,
- shale gas genesis,
- marine hydrocarbon source rocks

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References (24)

References

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