海拉尔盆地红旗凹陷构造层特征及构造演化  

Characteristics and evolution of the structural formations in Hongqi Sag,Hailar Basin

作　　者：杨旭[1] 申文静[1] YANG Xu;SHEN Wenjing(Exploration and Development Research Institute of Daqing Oilfield Co Ltd,Daqing 163712,China)

机构地区：[1]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712

出　　处：《大庆石油地质与开发》2021年第6期20-27,共8页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家科技重大专项“大庆油气持续有效发展关键技术研究与应用”(2016E⁃0202)。

摘　　要：利用二、三维地震资料及钻井成果,对海拉尔盆地红旗凹陷的构造层及构造演化特征进行了研究。根据不整合界面、构造发育特征及地层组合情况,将研究区沉积地层由下至上划分为3个一级构造层,经历了晚侏罗世断陷发育阶段、早白垩世断陷发育阶段、早白垩世断坳发育阶段、晚白垩世坳陷发育阶段4个阶段。不同构造层构造特征不同:中-上侏罗统构造层以伸展构造样式为主,形成箕状结构火山岩断陷;下白垩统构造层以伸展构造样式和伸展-走滑构造样式为主,形成箕状结构断陷;上白垩统构造层以反转构造样式为主。该研究结果对明确红旗凹陷地质结构及油气勘探具有指导意义。Based on 2D and 3D seismic data and drilled results,the structural layers and tectonic evolution char⁃acteristics of Hongqi Sag in Hailar Basin were studied.According to the unconformity interface,structural develop⁃ment characteristics and stratigraphic assemblage,the sedimentary formations in the study area were divided into three first⁃order structural layers from bottom to top,which have experienced four stages:Late Jurassic fault⁃depres⁃sion development stage,Early Cretaceous fault⁃depression development stage,Early Cretaceous fault⁃sag stage and Late Cretaceous depression development stage.Different structural formations possess diverse characteristics:Middle and Upper Jurassic structural formations are mainly dominated by extensional structural style and form a dustpan⁃like volcanic fault depression;Lower Cretaceous structural layers are dominated by extensional structural style and extensional-strike slip structural style,forming a dustpan⁃like fault depression;Upper Cretaceous struc⁃tural layer is dominated by inversion structural style.The research achievements have a guiding significance for clar⁃ifying the geological structure and oil⁃gas exploration in Hongqi Sag.

关 键 词：海拉尔盆地 红旗凹陷 构造层 构造演化 

分 类 号：TE122.1[石油与天然气工程—油气勘探]