大庆石油地质与开发2024，Vol.43Issue(6)：20-28,9.DOI:10.19597/J.ISSN.1000-3754.202306050
渤海海域秦南凹陷沙河街组烃源岩沉积环境及发育模式
Sedimentary environment and development pattern of source rock in Shahejie Formation of Qinnan Sag in Bohai Sea
摘要
Abstract
High quality source rock is developed in Shahejie Formation of Qinnan Sag,and sedimentary environ-ment restoration of source rock is of great significance to determine the development pattern of source rock and char-acterize the heterogeneity of source rock.Based on data of paleontology,major and trace elements,the sedimentary environment of Shahejie Formation is restored,and the development pattern of source rock is defined.The results show that paleoclimate was relatively warm and humid during sedimentary period of the third member of Shahejie Formation,and water body was fresh to brackish water with average depth of 28.46 m.During sedimentary period of the first and second member of Shahejie Formation,paleoclimate was dry and hot,and water body was brackish to semi-saline water with average depth of 13.03 m.Water body of Shahejie Formation all develop a reduction to strong reduction environment.The productivity of the third member of Shahejie Formation is high,and the lake basin is eu-trophic lake,while the productivity of the first and second member of Shahejie Formation is relatively high,and the lake is moderately eutrophic lake.Source rock in the third member of Shahejie Formation is controlled by warm and humid climate,high paleoproductivity and deep water with strong reducing environment,while the source rock in the first and second member of Shahejie Formation is controlled by dry and hot climate,high productivity and sa-line water and with strong reduction environment.The research provides guidance for resource potential evaluation and exploration target optimization in Qinnan Sag.关键词
秦南凹陷/沙河街组/烃源岩/沉积环境/发育模式Key words
Qinnan Sag/Shahejie Formation/source rock/sedimentary environment/development pattern分类
能源科技引用本文复制引用
耿名扬,刘志峰,吴斌..渤海海域秦南凹陷沙河街组烃源岩沉积环境及发育模式[J].大庆石油地质与开发,2024,43(6):20-28,9.基金项目
国家科技重大专项"中国近海富烃凹陷优选与有利勘探方向预测"(2016ZX05024-002) （2016ZX05024-002）
中国海洋石油集团有限公司重大课题"中国近海盆地潜在富油凹陷资源潜力、成藏机制与突破方向"(2021-KT-YXKY-03). （2021-KT-YXKY-03）
