中国东部新生代陆相断陷盆地层序的构成样式

来源期刊:中南大学学报(自然科学版)2010年第1期

论文作者:王华 廖远涛 陆永潮 任建业 王家豪 严德天 刘彦博

文章页码:277 - 285

关键词:层序构成样式;陆相断陷盆地;新生代;中国东部

Key words:sequence architecture style; continental rift basin; Cenozoic; East China

摘    要:选取我国东部跨不同古构造、古气候和古地理单元的多个陆相断陷盆地,如济阳凹陷、南阳和泌阳凹陷、南堡凹陷、歧口凹陷、江汉盆地、东濮凹陷、百色盆地和苏北盆地等,以层序界面和层序单元的精细划分为基础,对古近系-新近系的构造地层格架和层序结构特征进行对比分析,总结出犁式断坳型和陡倾式断坳型2种类型层序地层格架和断坡带型、弯折带型、枢纽带型(或斜坡型) 3种典型的层序构成样式。不同级次的构造控制着层序的发育和层序样式特点,在此基础上建立了对储集体展布和烃源岩潜力具有重要预测功能的层序地层模式,从而为我国东部具有地域及地质特色的陆相含油气盆地内隐蔽油气藏的寻找和评价提供了一套新的思维框架。

Abstract: Two types of sequence stratigraphic frameworks of plough-shaped and steep dip, three typical sequence architectural styles of fault-break zones, bend slope-break, pivotal slope-break (or slope belts) were summarized based on fine division about the sequence boundary and sequence unit, contrast analysis of tectono-stratigraphy framework and sequence architecture of continental rift basins was made crossing different paleotectonic, paleoclimate, and paleogeographic units in Paleogene and Neogene in East China, such as Jiyang Depression, Nanyang and Biyang Depression, Jianghan Basin, Dongpu Depression, Baise Basin, and Subei Basin. Different level tectonics and structures may control the sequence development and sequence pattern. On the basis of the previous integrated analysis, sequence stratigraphic models which have important prediction function on reservoir distribution and potential source rocks are set up and a set of new idea is offered for the search and evaluation of subtle oil reservoirs within the continental rift basins characterized by the regional and geological features in East China.

基金信息:国家自然科学基金资助项目

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