南海白云凹陷深水区渐新世—中新世陆架边缘三角洲形成及演化

吴景富; 徐强; 祝彦贺

doi:10.3799/dqkx.2010.083

Volume 35 Issue 4

Jul. 2010

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WU Jing-fu, XU Qiang, ZHU Yan-he, 2010. Generation and Evolution of the Shelf-Edge Delta in Oligocene and Miocene of Baiyun Sag in the South China Sea. Earth Science, (4): 681-690. doi: 10.3799/dqkx.2010.083

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WU Jing-fu, XU Qiang, ZHU Yan-he, 2010. Generation and Evolution of the Shelf-Edge Delta in Oligocene and Miocene of Baiyun Sag in the South China Sea. Earth Science, (4): 681-690. doi: 10.3799/dqkx.2010.083

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Generation and Evolution of the Shelf-Edge Delta in Oligocene and Miocene of Baiyun Sag in the South China Sea

doi: 10.3799/dqkx.2010.083

1.
Key Laboratory of Tectonics and Petroleum Resources, MOE, China University of Geosciences, Wuhan 430074, China
2.
CNOOC Research Center, Beijing 100027, China

Received Date: 2010-02-26
Publish Date: 2010-07-01

Abstract

Abstract

Sedimentary characteristics of Baiyun sag in Oligocene and Miocene play an important role in deep-water oil and gas exploration in South China Sea, among which there is a special three-order "source to sink" relationship between shelf-edge delta and slope sedimentary systems. Based on recent cores and exact 3D seismic interpretation, we find out how shelf-edge delta formed and how it evolved, and we also find out that the "source" of the shelf-edge delta controled deep-water gravity flow. The shelf-edge delta generated in late of LST in Oligocene, and delta front is the main component, shelf-edge fault controled its development and delta progressed as "S". On the other hand, between outer shelf and upper slope the sedimentation mechanism changed from tractive current to gravity flow in Miocene. Slope complex channels and gravity flow settings accumulated in Baiyun sag, meanwhile, proximal carbonate rocks from Dongsha uplift blended, so clastic rocks and carbonate rocks mixed. This kind of sedimentary characteristic is controlled by the development of shelf-edge delta and shelf-edge fault, which dominates the distribution of shelf-edge delta and deep-water reservoirs. Therefore, we should pay more attention to formation, evolution and distribution of shelf-edge delta, and its three-order "source to sink" response to deep-water sediment in oil and gas exploration of Baiyun sag.
- Baiyun sag,
- Oligocene and Miocene,
- shelf-edge delta,
- double sources,
- shelf break

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References(34)

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Generation and Evolution of the Shelf-Edge Delta in Oligocene and Miocene of Baiyun Sag in the South China Sea

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