古地理学报 ›› 2017, Vol. 19 ›› Issue (2): 327-340. doi: 10.7605/gdlxb.2017.02.025

• 岩相古地理学及沉积学 • 上一篇    下一篇

松辽盆地南部乾安地区上白垩统青三段高分辨率层序地层及沉积特征*

王俊1, 2, 鲍志东1, 2, 王云龙3, 华松涛3, 杨益春1, 2, 何陵沅1, 2, 王晓涛1, 2, 张云逸4   

  1. 1 中国石油大学(北京)地球科学学院,北京 102249。
    2 中国石油大学(北京)油气资源与探测国家重点实验室,北京 102249。
    3中国石油天然气股份有限公司吉林油田分公司扶余采油厂,吉林松原 138000。
    4中国石油集团川庆钻探工程有限公司长庆井下技术作业公司,陕西西安 710018
  • 收稿日期:2016-09-19 修回日期:2016-11-04 出版日期:2017-04-01 发布日期:2017-04-01
  • 通讯作者: 通讯作者简介 鲍志东,男,1964年生,中国石油大学(北京)教授,主要从事沉积学及储集层地质学研究。E-mail: baozd@cup.edu.cn。
  • 作者简介:王俊,男,1987年生,中国石油大学(北京)博士研究生,主要从事层序地层学、沉积学和储集层构型表征研究。E-mail: ric_jun@126.com。
  • 基金资助:
    *国家科技重大专项(编号: 2011ZX05004-004-007)资助

High-resolution sequence stratigraphy and sedimentary characteristics of the Member 3 of Qingshankou Formation of Upper Cretaceous in Qian'an area, south Songliao Basin

Wang Jun1, 2, Bao Zhidong1, 2, Wang Yunlong3, Hua Songtao3, Yang Yichun1, 2, He Lingyuan1, 2, Wang Xiaotao1, 2, Zhang Yunyi4   

  1. 1 College of Geosciences,China University of Petroleum(Beijing),Beijing 102249;
    2 State Key Laboratary of Petroleum Resources and Prospecting,China University of Petroleum(Beijing),Beijing 102249;
    3 Fuyu Oil Production Plant,Jilin Oilfield Company,PetroChina,Songyuan 138000,Jilin ;
    4 Changqing Downhole Technology Service Company of CNPC Chuanqing Drilling Engineering Co.,Ltd.,Xi'an 710018,Shaanxi;
  • Received:2016-09-19 Revised:2016-11-04 Online:2017-04-01 Published:2017-04-01
  • About author:About the first author Wang Jun,born in 1987,is a Ph.D. candidate of China University of Petroleum(Beijing). He is mainly engaged in studies of sequence stratigraphy,sedimentology and reservoir architecture characterization. E-mail: ric_jun@126.com.About the corresponding author Bao Zhidong,born in 1964,is a professor of China University of Petroleum(Beijing). His current research interests include sedimentology and reservoir geology. E-mail: baozd@cup.edu.cn.
  • Supported by:
    Financially supported by National Science and Technology Major Project(No.2011ZX05004-004-007)

摘要: 综合利用岩心和测井资料,系统总结了松辽盆地南部乾安地区上白垩统青山口组三段高分辨率层序界面的识别标志,建立了高分辨率层序地层格架,对高分辨率层序地层格架内地层叠置特征进行了探讨,并进一步分析了层序地层格架内河道砂体展布特征及沉积相演化规律。识别出冲刷面、底部滞留沉积和滑塌沉积3种高分辨率层序界面识别标志,以及泥岩颜色转换和含油性变化2类辅助性证据,在此基础上将青三段划分为2个三级层序(SQ1,SQ2)、13个四级层序(HFSQ1-HFSQ13),层序内可进一步划分出湖侵体系域(LTST)和湖退体系域(LRST)。四级层序体系域内识别出单向加深A1型、单向加深A2型、单向变浅B型、复合对称C1型和复合对称C2型共5类四级层序结构;三级层序湖平面升降可划分为4个阶段,各阶段内四级层序组合模式各不相同。根据砂体连井对比和平面相分析成果,结合体系域阶段划分,在研究区青三段高分辨率层序地层格架内共总结出4类沉积模式。其中,湖退体系域早期沉积模式砂体分区叠置,河道平面呈分支树杈状。湖退体系域晚期沉积模式砂体规模最大,整体连片叠置,河道平面呈网络交织状,分流河道间湾在河道间呈零星点状分布。湖侵体系域早期沉积模式砂体规模较小,孤立分布,河道平面呈分支树杈状。湖侵体系域晚期沉积模式砂体规模最小,零星分布,河道平面呈曲流状—分支树杈状。

关键词: 松辽盆地, 乾安地区, 青山口组, 高分辨率层序地层, 沉积特征

Abstract: Integrated with core and logging data,the recognition marks of high resolution sequence stratigraphic boundary of the Member 3 of Qingshankou Formation of Upper Cretaceous in Qian'an area of south Songliao Basin is summarized systematically. The high ̄resolution sequence is established. Moreover, the stacking pattern of the strata in the framework of high-resolution sequence stratigraphy is discussed and the characteristics of sand distribution and disciplines of sedimentary facies evolution in the sequence framework is analyzed. Several conclusions are made as follows. Three sequence boundaries and two supporting evidences have been recognized in the study area,such as erosion surface,stranded sediments at the bottom of the deposit,slump deposit, switched color of mudstone and differences in petroliferous. Then the Member 3 of Qingshankou Formation is divided into two 3rd-order sequences(SQ1,SQ2)and thirteen 4th-order sequences(HFSQ1-HFSQ13),and each of the sequence can be divided into lake transgressive system tract(LTST)and lake regressive system tract(LRST). Five types of the 4th-order sequence structure have been recognized in the system tract. The process of lake level fluctuation can be divided into four stages,and the combination model of 4th-order sequences in each stage is different. Based on the analysis of sand correlation in cross-section and facies distribution, according to the phase division of lake level fluctuation,four types of sedimentary model have been recognized in the framework of high-resolution sequence stratigraphy. Each model has its unique sand distribution feature in vertical direction and shape in horizontal direction.

Key words: Songliao Basin, Qian'an area, Qingshankou Formation, high-resolution sequence stratigraphy, sedimentary characteristics

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