贺兰山—桌子山地区石炭—二叠系陆表海高精度层序地层模拟与聚煤分析

现代地质 ›› 2009, Vol. 23 ›› Issue (4): 625-630.

贺兰山—桌子山地区石炭—二叠系陆表海高精度层序地层模拟与聚煤分析

刘景彦¹，林畅松¹，常艳艳¹，高达¹，张宇²

1中国地质大学能源学院，北京100083；2兖州矿业集团杨村煤矿，山东兖州272118

收稿日期:2009-01-12 修回日期:2009-03-15 出版日期:2009-08-20 发布日期:2011-12-21
作者简介:刘景彦，女，副教授，博士，1972年出生，沉积学专业，主要从事沉积盆地分析方面的教学与科研工作。E-mail: ljingyan@cugb.edu.cn。
基金资助:
国家“973”项目（2006CB202302）；国家自然科学基金项目（40372056）

The High-resolution Sequence Stratigraphy Simulation and Coal Accumulation Analysis of Carboniferous-Permian Offshore Clastic Deposit in Helanshan-Zhuozishan Area

LIU Jing-Yan¹， Lin Chang-Song ¹， Chang Yan-Yan¹， Gao Da¹， Zhang Yu²

1School of Energy Resources,China University of Geosciences, Beijing100083,China; 
2Yangcun Coal Mine of Yanzhou Mineral Industry Group, Yanzhou, Shandong272118,China

Received:2009-01-12 Revised:2009-03-15 Online:2009-08-20 Published:2011-12-21

摘要/Abstract

摘要：

层序地层学的研究不断从盆地规模的层序地层格架和体系域分析向高精度的、微相规模的层序地层分析的方向深化。精细的野外和钻井资料分析表明，贺兰山—桌子山地区的太原组—山西组可划为3个三级层序、6~8个四级层序及20多个准层序。四级层序界面一般是下切的分流河道、潮—河混合水道、近端河口坝或滨面沉积的底部冲刷面，海进初期发育的煤层底界以及盆地方向低水位三角洲前缘底超面等，可以在大范围内追踪，其识别和划分是建立高精度层序地层格架的关键。应用层序地层模拟系统（SSMS）可揭示海平面变化、构造沉降等对层序形成过程的控制。模拟分析表明，对称和不对称的相对海平面变化产生的层序结构存在明显的差异，快速上升后缓慢下降的海平面变化过程可解释区内四级层序的结构特征和聚煤规律。四级层序高水位晚期至海进的转换期有利于形成广泛分布的煤层。

关键词: 高精度层序地层, 动态模拟, 聚煤规律, 石炭—二叠系, 贺兰山—桌子山 

Abstract:

The study of sequence stratigraphy developed continuously from sequence stratigraphy framework and depositional system tract analysis of basin scale to high-resolution and microfacies scale.Refine outcrop and well logging analysis show that there can be divided into 3 3^rd order sequences, 6-8 4^thorder sequences and more than 20 parasequences in Shanxi Formation and Taiyuan Formation of Helanshan-Zhuozishan area.The 4^th order sequence generally are bounded by incised distributary channel, tide and fluvial mix channel, near mouth bar or scoured base of shoreface deposit, coal base developed on early transgression and delta front baselap surface developed in low stand system tract.These surfacies can be extensively traced in the study area, and their recognition and subdivision are critical factors of high-resolution sequence stratigraphy framework foundation.The sequence stratigraphy simulation applying SSMS system may reveal the control of sea level change and tectonic subsidence on sequence formation process.The simulation results show that symmetrical and non-symmetrical relative sea level change formed obvious different sequence compositions.The fast rise and slow drop process of sea level interpreted the 4^th order sequence composition character and coal accumulation regular pattern.The transformation of later high stand system tract and transgression is the most favorable period to form coal deposition widely.

Key words: high-resolution sequence stratigraphy, dynamic simulation, coal accumulation, Carboniferous-Permian, Helanshan-Zhuozishan area

中图分类号:

TE121.3

刘景彦林畅松常艳艳高达张宇. 贺兰山—桌子山地区石炭—二叠系陆表海高精度层序地层模拟与聚煤分析[J]. 现代地质, 2009, 23(4): 625-630.

LIU Jing-Yan，Lin Chang-Song ，Chang Yan-Yan，Gao Da，Zhang Yu. The High-resolution Sequence Stratigraphy Simulation and Coal Accumulation Analysis of Carboniferous-Permian Offshore Clastic Deposit in Helanshan-Zhuozishan Area[J]. Geoscience, 2009, 23(4): 625-630.

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