珠江口盆地恩平凹陷文昌组层序格架中中-深湖相烃源岩空间展布规律及发育模式

龚丽; 朱红涛; 舒誉; 付鑫; 杨香华; 刘昭茜

doi:10.3799/dqkx.2014.052

Volume 39 Issue 5

May 2014

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Article Navigation > Earth Science > 2014 > 39(5): 546-556

Gong Li, Zhu Hongtao, Shu Yu, Fu Xin, Yang Xianghua, Liu Zhaoqian, 2014. Distribution of Middle-Deep Lacustrine Source Rocks within Sequence Stratigraphic Framework of Wenchang Formation in Enping Depression, the Pearl River Mouth Basin. Earth Science, 39(5): 546-556. doi: 10.3799/dqkx.2014.052

Citation:

Gong Li, Zhu Hongtao, Shu Yu, Fu Xin, Yang Xianghua, Liu Zhaoqian, 2014. Distribution of Middle-Deep Lacustrine Source Rocks within Sequence Stratigraphic Framework of Wenchang Formation in Enping Depression, the Pearl River Mouth Basin. Earth Science, 39(5): 546-556. doi: 10.3799/dqkx.2014.052

Citation:

Gong Li, Zhu Hongtao, Shu Yu, Fu Xin, Yang Xianghua, Liu Zhaoqian, 2014. Distribution of Middle-Deep Lacustrine Source Rocks within Sequence Stratigraphic Framework of Wenchang Formation in Enping Depression, the Pearl River Mouth Basin. Earth Science, 39(5): 546-556. doi: 10.3799/dqkx.2014.052

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Distribution of Middle-Deep Lacustrine Source Rocks within Sequence Stratigraphic Framework of Wenchang Formation in Enping Depression, the Pearl River Mouth Basin

doi: 10.3799/dqkx.2014.052

Gong Li^{1, 2
,},
Zhu Hongtao^{1, 2
,
,},
Shu Yu³,
Fu Xin^{1, 2},
Yang Xianghua^{1, 2},
Liu Zhaoqian^{1, 2}

1.
Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education, China University of Geosciences, Wuhan 430074, China
2.
Faculty of Earth Resources, China University of Geosciences, Wuhan 430074, China
3.
China National Offshore Oil Corporation Limited-Shenzhen, Shenzhen 510240, China

Received Date: 2013-12-10
Publish Date: 2014-05-01

Abstract

Abstract

The main prerequisite for the development of middle-deep lacustrine source rocks has been deduced on the basis of the comprehensive analysis of lake forming conditions, core analysis, oil-source correlation and seismic reflection characteristics in the Enping depression, the Pearl River Mouth Basin. Compared with the seismic facies of source rocks of Paleogene Wenchang Formation in the proven hydrocarbon-rich sag (Panyu 4 and Lufeng 13 sags of Huizhou depression), the distribution and model of middle-deep lacustrine source rocks had been reconstructed in the Enping depression. In the study area the source rocks which are characterized by continuous seismic reflections with low frequency and high amplitude are occurred in every third-order sequence. In the Enping 17 sag they are mainly distributed in the central and west parts, while vertically the scope in the Upper Wenchang Formation was smaller than that of Lower Wenchang Formation and the sedimentation center is to the side of Fault 1 that controlled depression. In the Enping 18 sag the source rocks are mainly located in the central part close to Fault 2 that controlled sag, while vertically the scope in the the Upper Wenchang Formation is bigger than that in the Lower Wenchang Formation and the sedimentation center almost remained unchanged. The source rocks that has sheet-like seismic reflections with weak amplitude to blank are primarily distributed in the third-order sequences SQ3-SQ5. In the Enping 17 sag they are restricted in a small negative tectonic unit located south of the internal low uplift. In the Enping 18 sag they are distributed in the deep sag. Based on the distribution of middle-deep lacustrine source rocks, three developmental models are established namely: (1) the widespread source rocks in the transgressive system tracts and highstand system tracts; (2) source rocks developed in the lowstand system tracts, for example in SQ5 in the Wenchang Formation; (3) source rocks developed south of the internal low uplift, restricted in a small negative tectonic unit.
- Lacustrine source rock,
- prediction,
- sequence stratigraphy,
- development model,
- Wenchang Formation,
- Enping depression,
- the Pearl River Mouth,
- petroleum geology

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Distribution of Middle-Deep Lacustrine Source Rocks within Sequence Stratigraphic Framework of Wenchang Formation in Enping Depression, the Pearl River Mouth Basin

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