鄂尔多斯盆地延安地区本溪组-太原组地层及其沉积演化特征  

High Resolution Sequence Stratigraphy and Sedimentary Evolution Characteristics of Benxi Formation-Taiyuan Formation in Yan’an Area,Ordos Basin

作　　者：崔宏俊 雷燕云 曹雄伟 魏灿灿 李鹏程 付金伟 胡震 王博涵 CUI Hongjun;LEI Yanyun;CAO Xiongwei;WEI Cancan;LI Pengcheng;FU Jinwei;HU Zhen;WANG Bohan(No.1 Gas Production Plant,Shaanxi Yanchang Petroleum(Group)Yanchang Gas Field,Yan’an,Shaanxi 718500,China)

机构地区：[1]陕西延长石油(集团)延长气田采气一厂,陕西延安716000

出　　处：《西安石油大学学报（自然科学版）》2023年第3期19-26,共8页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：国家自然科学基金青年项目(41702117)。

摘　　要：为了揭示鄂尔多斯盆地延安地区地层与其沉积相特征,以层序地层学和沉积学理论为指导,对鄂尔多斯盆地延安地区进行地层单元划分和沉积演化研究。在研究区目的层段内识别出Ⅰ、Ⅱ、Ⅲ级层序界面各1个,识别出Ⅳ级层序界面4个、Ⅴ级层序界面若干。建立了研究区本溪组至太原组的等时地层格架,认为延安地区本溪期发育潮坪-障壁岛-泻湖沉积,太原期发育浅海碳酸盐陆棚沉积,太原期是晚古生代水深最大的时期。本溪期—太原期是鄂尔多斯盆地的陆表海沉积阶段。In order to reveal the characteristics of sequence stratigraphy and sedimentary facies in Yan’an area of Ordos Basin,the stratigraphic unit division and sedimentary evolution of Yan’an area of Ordos Basin were studied based on the theory of sequence stratigraphy and sedimentology.One sequence interface of classⅠ,one sequence interface of classⅡ,one sequence interface of classⅢ,four sequence interfaces of classⅣand several sequence interfaces of classⅤwere identified in the target segment of the study area.The isochronous stratigraphic framework from Benxi Formation to Taiyuan Formation in the study area is established.It is held that tidal flat-barrier island-lagoon deposition developed in Benxi period in Yan’an area,and shallow sea carbonate shelf deposition developed in Taiyuan period,and Taiyuan period is the period with the greatest water depth in the Late Paleozoic.Benxi-Taiyuan stage is the epicontinental sea sedimentary stage in Ordos Basin.

关 键 词：层序 层序界面 本溪组-太原组 沉积演化 

分 类 号：TE121.34[石油与天然气工程—油气勘探]