琼东南盆地南部低凸起及其周缘区天然气水合物富集影响因素和成藏模式

何玉林; 梁金强; 石万忠; 匡增桂; 邓炜; 王任; 徐立涛; 杜浩

doi:10.3799/dqkx.2021.207

Volume 47 Issue 5

May 2022

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Article Navigation > Earth Science > 2022 > 47(5): 1711-1727

He Yulin, Liang Jinqiang, Shi Wanzhong, Kuang Zenggui, Deng Wei, Wang Ren, Xu Litao, Du Hao, 2022. Influencing Factors and Accumulation Modes of Gas Hydrate in South Low Uplift and Its Surrounding Area of Qiongdongnan Basin. Earth Science, 47(5): 1711-1727. doi: 10.3799/dqkx.2021.207

Citation:

He Yulin, Liang Jinqiang, Shi Wanzhong, Kuang Zenggui, Deng Wei, Wang Ren, Xu Litao, Du Hao, 2022. Influencing Factors and Accumulation Modes of Gas Hydrate in South Low Uplift and Its Surrounding Area of Qiongdongnan Basin. Earth Science, 47(5): 1711-1727. doi: 10.3799/dqkx.2021.207

Citation:

He Yulin, Liang Jinqiang, Shi Wanzhong, Kuang Zenggui, Deng Wei, Wang Ren, Xu Litao, Du Hao, 2022. Influencing Factors and Accumulation Modes of Gas Hydrate in South Low Uplift and Its Surrounding Area of Qiongdongnan Basin. Earth Science, 47(5): 1711-1727. doi: 10.3799/dqkx.2021.207

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Influencing Factors and Accumulation Modes of Gas Hydrate in South Low Uplift and Its Surrounding Area of Qiongdongnan Basin

doi: 10.3799/dqkx.2021.207

He Yulin^{1, 2, 3
,
,},
Liang Jinqiang^{1, 2, 3
,
,
,},
Shi Wanzhong^{4, 5},
Kuang Zenggui^{1, 2, 3},
Deng Wei^{1, 2, 3},
Wang Ren^{4, 5},
Xu Litao^{4, 5},
Du Hao^{4, 5}

1.
Key Laboratory of Marine Mineral Resources, Ministry of Natural Resources, Guangzhou 510075, China
2.
Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou 511458, China
3.
Guangzhou Marine Geological Survey, China Geological Survey, Guangzhou 510075, China
4.
Key Laboratory of Tectonics and Petroleum Resources, Ministry of Education, China University of Geosciences, Wuhan 430074, China
5.
School of Earth Resources, China University of Geosciences, Wuhan 430074, China

Received Date: 2021-12-11
Publish Date: 2022-05-25

Abstract

Abstract

In order to clarify the influencing factors and accumulation model of gas hydrate in the southern low uplift and its surrounding area of Qiongdongnan basin, using drilling, logging and 2D/3D seismic data obtained from gas hydrate drilling, the geological and geophysical characteristics of gas hydrate occurrence in the study area are analyzed, and the influencing factors of hydrate accumulation control are discussed, and the gas hydrate accumulation model is established. The results show that the southern low uplift of Qiongdongnan basin and its surrounding areas are located in the dominant direction of deep fluid transport on the southern slope of the central depression zone. Gas hydrate drilling at multiple stations shows that the gas hydrate has the characteristics of stratified and multi-type reservoirs. In logging, gas hydrate formation is characterized by high resistivity and low acoustic.The seismic profile analysis shows that the gas filling at the top of gas chimney is obvious, and the gas vertical migration is limited. The gas source of hydrate in the study area is both biogenic and thermogenic gas. Faults, gas chimney and and pore fracture leakage system provide good transportation conditions for the migration of thermogenic gas. The rapid accumulation of shallow mass transport deposits makes it difficult for the internal pore fluid to discharge rapidly, so the pore fluid pressure is higher than that of the overlying and underlying strata, which hinders the vertical dispersion of the underlying fluid and forms a sealing effect. Overpressure sealing layer is the main controlling factor of hydrate in multi-type reservoirs in the study area. According to the difference of sealing ability and its influence on gas hydrate accumulation, two types of hydrate accumulation and enrichment models of closed system and open system are summarized.
- Qiongdongnan basin,
- gas hydrate,
- shallow overpressure,
- influencing factor,
- accumulation model,
- petroleum geology

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Influencing Factors and Accumulation Modes of Gas Hydrate in South Low Uplift and Its Surrounding Area of Qiongdongnan Basin

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