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| 蒙古塔木察格盆地塔南凹陷下白垩统层序结构类型、控制因素与层序发育模式 | |
| 引用本文： | 杨永华,纪友亮,曹瑞成,蒙启安.蒙古塔木察格盆地塔南凹陷下白垩统层序结构类型、控制因素与层序发育模式[J].现代地质,2009,23(4). |
| 作者姓名： | 杨永华 纪友亮 曹瑞成 蒙启安 |
| 作者单位： | 1. 中国石油大学,油气资源与探测国家重点实验室,北京,102249;中国石油大学,资源与信息学院,北京,102249;中国石油,大庆油田,黑龙江,大庆,163000 2. 中国石油大学,油气资源与探测国家重点实验室,北京,102249 3. 中国石油,大庆油田,黑龙江,大庆,163000 |
| 摘 要： | 利用录井及地震反射资料,采用层序地层学原理对蒙古塔木察格盆地塔南凹陷下白垩统地层层序进行了划分和对比,划分出了4个三级层序(SQ1—SQ4)。在此基础上,结合盆地的构造演化特点,研究了层序结构特征,划分了层序类型,其中,SQ1和SQ2为初始裂谷期湖泊层序,SQ3为裂谷深陷期层序,SQ4为裂谷后过渡层序。层序的结构主要受构造沉降方式控制,塔南凹陷不同时期构造沉降方式不同,形成了3种层序发育模式,即简单箕状斜坡模式、差异沉降构造反转模式、坳陷型层序发育模式,不同的层序发育模式,其地层岩性圈闭的发育和分布不同。 |
| 关 键 词： | 塔南凹陷 层序结构 控制因素 层序发育模式 |
Types of Sequences, Controlling Factors and Sequence Models for Lower Cretaceous of Tanan Depression in Tamtsag Basin,Mongolia |
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| YANG Yong-hua,JI You-liang,CAO Rui-cheng,MENG Qian.Types of Sequences, Controlling Factors and Sequence Models for Lower Cretaceous of Tanan Depression in Tamtsag Basin,Mongolia[J].Geoscience——Journal of Graduate School,China University of Geosciences,2009,23(4). | |
| Authors: | YANG Yong-hua JI You-liang CAO Rui-cheng MENG Qian |
| Abstract: | In this article,based on the principle of sequence stratigraphy,the sequences in Lower Cretaceous of Tanan depression in Tamtsag Basin,Mongolia are discriminated and correlated according to well logging and seismic data,and four third-order sequences(SQ1-SQ4)are identified.On the basis of these results,the characteristics of sequence structures are studied and the types of sequences are classified through analysis of the tectonic evolution features: SQ1 and SQ2 are sequences of initial rift lacustrine basin,SQ3 is a sequence of maximum rift lacustrine basin,and SQ4 is a sequence of post rift lacustrine basin.The sequence structures are mainly controlled by tectonic subsidence patterns,because the tectonic subsidence patterns are different in the evolution time of Tanan depression,three types of sequence models are formed,which are simple half graben shaped slope model,differential subsidence and tectonic rollback model,and depression sequence model.The development and distribution of stratigraphic and lithologic traps are distinct in different sequence models. |
| Keywords: | Tanan depression sequence structure controlling factor sequence model |
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