白云-荔湾凹陷珠江组大型深水水道体系沉积特征及成因机制

廖计华; 徐强; 陈莹; 王颖; 蔡露露; 邹梦君; 曾清波; 焦振华

doi:10.3799/dqkx.2016.086

Volume 41 Issue 6

Jun. 2016

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Article Navigation > Earth Science > 2016 > 41(6): 1041-1054

Liao Jihua, Xu Qiang, Chen Ying, Wang Ying, Cai Lulu, Zou Mengjun, Zeng Qingbo, Jiao Zhenhua, 2016. Sedimentary Characteristics and Genesis of the Deepwater Channel System in Zhujiang Formation of Baiyun-Liwan Sag. Earth Science, 41(6): 1041-1054. doi: 10.3799/dqkx.2016.086

Citation:

Liao Jihua, Xu Qiang, Chen Ying, Wang Ying, Cai Lulu, Zou Mengjun, Zeng Qingbo, Jiao Zhenhua, 2016. Sedimentary Characteristics and Genesis of the Deepwater Channel System in Zhujiang Formation of Baiyun-Liwan Sag. Earth Science, 41(6): 1041-1054. doi: 10.3799/dqkx.2016.086

Citation:

Liao Jihua, Xu Qiang, Chen Ying, Wang Ying, Cai Lulu, Zou Mengjun, Zeng Qingbo, Jiao Zhenhua, 2016. Sedimentary Characteristics and Genesis of the Deepwater Channel System in Zhujiang Formation of Baiyun-Liwan Sag. Earth Science, 41(6): 1041-1054. doi: 10.3799/dqkx.2016.086

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Sedimentary Characteristics and Genesis of the Deepwater Channel System in Zhujiang Formation of Baiyun-Liwan Sag

doi: 10.3799/dqkx.2016.086

Research Institute of CNOOC, Beijing 100028, China

Received Date: 2015-12-10
Publish Date: 2016-06-15

Abstract

Abstract

The deepwater channel system is a large-scale deepwater sedimentary system which was newly found in abyssal mudstone of the upper Zhujiang Formation, eastern margin of Baiyun-Liwan sag in recent years. However, its sedimentary characteristics, sedimentary processes and main controlling factors are unclear yet.Based on substantial 2-D, 3-D seismic and well logging data, the depositional elements, geometry, internal architecture and sedimentary evolution of the deepwater channel system in Miocene Zhujiang Formation of Baiyun-Liwan sag were studied. In addition, the source supply, shelf break belt, palaeogeomorphology and their controlling effects on distribution, internal architecture and evolution of the deepwater channel system were discussed. Finally, the genetic mechanism of it was built.The results show that the deepwater channel system consists of channel, levee, and lobe, and channel is the primary depositional element. The deepwater channel can be subdivided into Baiyun sag segment, southern uplift segment and Liwan sag segment from north to south, which is mainly erosional channel, erosional-aggradational channel and aggradational channel, respectively. And it presents an evolutionary characteristic of "third-order channel" from north to south because the energy of gravity flow weakened by descending order. Two periods of channel evolution in vertical succession can be identified in each segment by identifying secondary erosional surfaces in the interior of channel. And there are distinctive internal filling properties in different channel evolution and different segments because of different fillings and transformation processes. The formation and development of deepwater channel system resulted from the interaction between the northern Pearl River Delta, shelf break belt and restricted paleotopography in eastern Baiyun-Liwan sag.
- deepwater channel system,
- Baiyun sag,
- Liwan sag,
- Zhujiang Formation,
- Pearl River Mouth Basin,
- deepwater exploration,
- petroleum geology

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Sedimentary Characteristics and Genesis of the Deepwater Channel System in Zhujiang Formation of Baiyun-Liwan Sag

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