摘要
断陷湖盆陆相层序内部构型主要研究各级层序单元内部不同环境下形成的地质体及其在空间上的配置关系。盆地充填序列及构造层序可用沉积总体样式来反映其内部构型；地震层序（层序组）及层序可用沉积体系来描述其内部构型；体系域（小层序组）、小层序及小层单元可分别用沉积相（亚相）、微相及岩性相来刻划其内部构型。泌阳断陷层序组ⅡＤ（即核三上段）是其油气勘探的主要目的层段，其中包含三个陆相层序，在双河—赵凹地区表现为冲积扇—扇三角洲—湖相沉积体系配置。这三个陆相层序共发育四类１３个小层序组、小层序达５０多个，其中可识别的沉积微相达十余种、岩性相共３３种。
The inner configuration of terrigenous sequence of fault depressed lacustrine basin means to study the geological bodies which were formed in different geological setting to make up every sequence unit and their spacial allocation.The inner configuration of basin fill sequence and tectonic sequence can be described by the total sedimentary style, and seismic sequence(sequence sets)and sequence by depositional system, and system tract(parasequence sets),parasequence and beds respectively by sedimentary facies(subfacies),microfacies and lithofacies.Sequence set Ⅱ D,meaning the upper member of Eh 3 which is a target of exploration in Biyang fault depression, includes three terrigenous sequences which depositional system is fluvial fan～fan delta～lacustrine in Shuanghe～Zhaoao area. In the three terrigenous sequences, thirteen parasequence sets have been developed, of which there are fifties recognizable parasequences, tens of inner microfacies, 33 kinds of lithofacies.
出处
《河南地质》
1998年第1期21-30,共10页
Henan Geology
关键词
泌阳断陷
陆相层序
层序内部构型
沉积微相
湖盆
Biyang fault depression,terrigenous sequence, inner configuration of sequence, total sedimentary style, depositional system, facies analysis, sedimentary microfacies, lithofacies
