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现代地质 ›› 2009, Vol. 23 ›› Issue (5): 767-775.

• 层序与沉积 •    下一篇

珠江口盆地惠州凹陷古近系珠海组近海潮汐沉积特征现代地质

邓宏文1,2, 郑文波1,2   

  1. 1中国地质大学 能源学院, 北京100083;2中国地质大学 海相储层演化与油气富集机理教育部重点实验室,北京100083
  • 收稿日期:2009-03-20 修回日期:2009-05-15 出版日期:2009-10-20 发布日期:2012-02-16
  • 作者简介:邓宏文, 女,教授,博士生导师,1946年出生, 沉积学专业,主要从事沉积学、层序地层学研究与油气勘探工作。Email: dhwen@vip.sina.com

 Characteristics of Offshore Tidal Deposits in the Lower Tertiary Zhuhai Formation, Huizhou Depression, Pearl River Mouth Basin

 DENG Hong-wen1,2,ZHENG Wen-bo1,2   

  1. 1School of Energy Resources, China University of Geosciences, Beijing100083,China;2Key Laboratory of Marine Reservoir Evolution and Hydrocarbon Accumulation Mechanism, Ministry of Education, China University of Geosciences, Beijing100083,China
  • Received:2009-03-20 Revised:2009-05-15 Online:2009-10-20 Published:2012-02-16

摘要:

前人研究成果多认为惠州凹陷西南部珠海组形成于辫状三角洲环境,或以受海侵影响的三角洲前缘沉积作用为主。在对研究区宏观构造—古地理背景分析之上,以岩心详细观察与描述为基础,通过岩相、测井相并辅助宏观地震相分析,提出珠海组沉积时期来自古珠江三角洲体系提供的丰富砂质沉积物在该区经历了潮汐的强烈改造作用,以潮汐沉积作用为主的认识。详细描述了发育在珠海组的潮汐沉积构造、潮下带、潮间带与潮上带沉积序列及其相组合特征,并以单井相分析为基础,结合区域地震相分析了研究区沉积相宏观展布特征。这一新认识为该区油气勘探,特别是位于该区主体部位的油气田开发中储层预测提供了依据和新思路。

关键词: 潮汐, 沉积构造, 相序组合, 地震相, 珠海组, 惠州凹陷

Abstract:

Previous studies consider that Zhuhai Formation in southwestern Huizhou depression was formed in the braided delta environment, or dominated by delta front which experienced transgressive reworking. Based on the palaeogeographic background analysis,the detailed observation and description of cores, combined with the analysis of lithofacies, electro-facies and seismic facies, this study reveals that deposit of Zhuhai Formation rich-in sand supplied by the Pearl River delta experienced reworking of strong tides, and is dominated by tidal sedimentation. In this paper, tidal sedimentary structure, sedimentary sequence and facies succession of inter-tidal and supratidal facies have been detailly described. The regional distribution of depositional system in the study area has been revealed based on facies analysis of single well, combined with regional seismic facies analysis. This new understanding will be favorable for oil and gas exploration and development in this area.

Key words: tidal, sedimentary structure, facies association, seismic facies, Zhuhai Formation, Huizhou depression

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