天然气地质学

南海北部边缘盆地第三系沉积及主要烃源岩发育特征

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  • (1.中国石油大学(华东)石油工程学院,山东 东营 257061;2.中海石油(中国)有限公司湛江分
    公司,广东 湛江 524057;3.中国科学院边缘海地质重点实验室,广东 广州 510640;
    4.国土资源部广州海洋地质调查局,广东 广州 510760)

收稿日期: 2007-08-28

  修回日期: 2007-12-29

  网络出版日期: 2008-02-10

基金资助

中国科学院三期知识创新项目“南海北部深水海域油气勘探关键问题研究”(编号:KZCX2-YW-203-2)资助.

Characteristics of Tertiary Sediments and Main Source Rocks, Northern South China Sea

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  • (1. College of Petroleum Engineering, China University of Petroleum, Dongying 257061, China; 
    2. Zhanjiang Branch of CNOOC Ltd., Zhanjinag 524057, China; 3. Key Laboratory of Marginal Sea Geology,
    CAS, Guangzhou 510640, China; 4. Guangzhou Marine Geological Survey Bureau, Ministry of Land and Resources, Guangzhou 510760, China)

Received date: 2007-08-28

  Revised date: 2007-12-29

  Online published: 2008-02-10

摘要

南海北部边缘盆地第三系沉积及烃源岩发育,既有巨厚海相坳陷沉积的中新统烃源岩,也有分布广泛的古近系中深湖相烃源岩,油气资源较丰富。根据南海北部边缘新生代沉积盆地结构、构造特征可将其划分为走滑伸展型和断陷裂谷两大类型,前者以新近系巨厚海相坳陷沉积及海相中新统烃源岩发育为突出特点,后者则以古近系陆相断陷裂谷沉积和大规模中深湖相烃源岩、近海(河湖)沼泽相煤系烃源岩发育为主要特征,这些烃源岩的发育展布规律、有机质丰度和生烃母质类型、成熟演化特点以及生烃潜力等均差异较大。

本文引用格式

马文宏,何家雄,姚永坚,刘海龄,万志峰 . 南海北部边缘盆地第三系沉积及主要烃源岩发育特征[J]. 天然气地球科学, 2008 , 19(1) : 41 -48 . DOI: 10.11764/j.issn.1672-1926.2008.01.41

Abstract

Basins in Northern South China Sea belong to passive margin basins, and they are located at the junction of the Eurasian, the Pacific and the Indian-Australian plates, and also at the Superposed areas of Palaeo-Tethyan structural regimes and Palaeo-Pacific structural regimes. So the geological settings of these basins are complex, their Tertiary sediments developed well, and the phenomena of petroleum geology are rich and colorful. Based on the characteristics of framework and tectonics, the basins in Northern South China Sea can be classified into two types, strike-slip basins and rift basins. The source rocks of the former are mainly the well-developed, huge thickness of Neogene marine depression sedimentary rocks and Miocene marine sedimentary rocks; those of the latter are significantly the rift sediments of Paleogene continental facies, and large-scale source rocks of medium-deep lacustrine facies and inshore paludal facies with coal measure strata well-developed.

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