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地质科学  1998, Vol. Issue (4): 435-446    DOI:
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泌阳断陷双河—赵凹地区陆相层序地层学模式
胡受权, 颜其彬
西南石油学院 南充 637001
SEQUENCE STRATIGRAPHIC MODEL IN SHUANGHE—ZHAO’AO OF BIYANG FAULT DEPRESSION,HENAN PROVINCE
Hu Shouquan, Yan Qibin
Petroleum Institute of Southwest, Nanchong, 637001
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摘要 以泌207井作为参照井,本区下第三系核三段上部所划3个陆相层序发育Ⅰ型层序界面一个,Ⅱ型层序界面3个。一个完整的Ⅰ型陆相层序自下而上发育有低位体系域(LST)、水进体系域(TST)、早期高位体系域(EHST)及晚期高位体系域(LHST)等4个体系域,共5个界面。除顶、底界面归属层序界面之外,其它3个界面皆为体系域界面;而Ⅱ型陆相层序缺失LST.无论何种体系域,其沉积体的几何形状均为楔状体,且各体系域的沉积相横向配置呈现规律性变化。等时层序地层框架模式清楚地显示了泌阳断陷成盆演化史、沉积充填史及其陆相层序时空展布特征。
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胡受权
颜其彬
关键词层序地层模式   陆相层序   断陷湖盆   泌阳     
Abstract: In this study,a reference well was used as “Depositional Shoreline Break” to study terrigenous sequence stratigraphy in the steep slope zone of the fault depressed lacustrine basin.According to the facies migration character and system tract superimposed style in the reference well,there are two types of terrigenous sequence (type Ⅰ and Ⅱ).The research result using B207 as the reference well shows that the three sequences of the upper member of Eh3 in the research area have one sequence boundary of type Ⅰ and three sequence boundaries of type Ⅱ.A complete terrigenous sequence of type Ⅰ can be divided into four system tracts:Lowstand System Tract (LST),Trangressive System Tract(TST),Early Highstand System Tract(EHST) and Late Highstand System Tract (LHST) from bottom to top,and has five boundaries in which the top and bottom belong to sequence boundary,and other three to sytem stract bounday.But terrigenous sequence of type Ⅱ lacks LST.The geometrical shape of sedimentary body in every system tract appears wedge like,namely sedimentary wedge,and the cross configuration of sedimentary facies in every system tract regularly changes from basin margin to basin inside.The chorostratigraphic framework model of the Biyang fault depression clearly shows the basin formation, evolution history, and sediment filling history, as well as distribution character of terrigenous sequence in time and space.
Key wordsSequence stratigraphic model   Terrigenous sequence   Fault depressed lacustrine basin   Biyang   
引用本文:   
胡受权,颜其彬. 1998, 泌阳断陷双河—赵凹地区陆相层序地层学模式. 地质科学, (4): 435-446.
Hu Shouquan,Yan Qibin. SEQUENCE STRATIGRAPHIC MODEL IN SHUANGHE—ZHAO’AO OF BIYANG FAULT DEPRESSION,HENAN PROVINCE[J]. Chinese Journal of Geology, 1998, (4): 435-446.
 
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