西湖凹陷西斜坡平湖组烃源岩沉积成因分析

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doi:10.3799/dqkx.2019.188

Volume 45 Issue 5

May 2020

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Yu Shui, 2020. Depositional Genesis Analysis of Source Rock in Pinghu Formation of Western Slope, Xihu Depression. Earth Science, 45(5): 1722-1736. doi: 10.3799/dqkx.2019.188

Citation:

Yu Shui, 2020. Depositional Genesis Analysis of Source Rock in Pinghu Formation of Western Slope, Xihu Depression. Earth Science, 45(5): 1722-1736. doi: 10.3799/dqkx.2019.188

Yu Shui, 2020. Depositional Genesis Analysis of Source Rock in Pinghu Formation of Western Slope, Xihu Depression. Earth Science, 45(5): 1722-1736. doi: 10.3799/dqkx.2019.188

Citation:

Yu Shui, 2020. Depositional Genesis Analysis of Source Rock in Pinghu Formation of Western Slope, Xihu Depression. Earth Science, 45(5): 1722-1736. doi: 10.3799/dqkx.2019.188

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Depositional Genesis Analysis of Source Rock in Pinghu Formation of Western Slope, Xihu Depression

doi: 10.3799/dqkx.2019.188

Yu Shui

CNOOC Research Institute Co., Ltd., Beijing 100028, China

Received Date: 2019-07-31
Publish Date: 2020-05-15

Abstract

Abstract

The western slope of Xihu deprssion is the realistic choice and main field of current petroleum exploration in East China Sea basin. However, there is no consensus reached on the basic geological problems such as the formation conditions and distribution rule of source rock. Based on sedimentology, coal petrography and organic geochemistry, using the drilling data, organic geochemistry of source rock and paleontology, genetic types and formation conditions of source rock of Pinghu Formation in western slope of Xihu depression have been systematically analyzed in this study. In addition, the organic facies division method corresponding to sedimentary environment has been established, and distribution law has been summarized.It is found that the source rocks are mainly coal-bearing source rocks, and secondly marine mudstones. The north-central region of western slope mainly develops costal sedimentary system affected by tidal, while the south-central region of western slope develops tidal-flat and semi-enclosed gulf system. Different sedimentary environments determine different types of source rocks. The tidal-flat and lagoon have higher coal-bearing development degree and hydrocarbon generation capacity than delta. This research is significant for source rock evaluation, reservoir prediction and exploration deployment in western slope.
- East China Sea basin,
- Xihu depression,
- Pinghu Formation,
- source rock,
- sedimentary system,
- development model,
- petroleum geology

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References(67)

References

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Depositional Genesis Analysis of Source Rock in Pinghu Formation of Western Slope, Xihu Depression

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