石油与天然气地质 ›› 2003, Vol. 24 ›› Issue (1): 81-86.doi: 10.11743/ogg20030119

• 油气空间 • 上一篇    下一篇

四川盆地西部上三叠统须家河组二段风暴岩沉积特征

李华启1, 姜在兴2, 邢焕清2, 鲜本忠2   

  1. 1. 中国科学院广州地球化学研究所, 广东广州510640;中国石油天然气股份有限公司规划计划部, 北京, 100011;
    2. 石油大学地球资源与信息学院, 山东东营, 257061
  • 收稿日期:2002-06-25 出版日期:2003-03-25 发布日期:2012-01-16

CHARACTERISTICS OF STORM DEPOSITS IN UPPER TRIASSIC XUJIAHE FORMATION, SICHUAN BASIN

Li Huaqi1, Jiang Zaixing2, Xing Huanqing2, Xian Benzhong 2   

  1. 1. Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, Guangdong;
    2. Department of Project, PetroChina, Beijing;
    3. College of Earth Resource and Information, Petroleum University, Dongying, Shandong
  • Received:2002-06-25 Online:2003-03-25 Published:2012-01-16

PDF (PC)

936

被引次数

50

摘要：

通过研究,发现了四川盆地西部上三叠统须家河组二段沉积具有典型的风暴沉积特征,主要包括渠模构造(或口袋构造)、冲刷面和截切构造、风暴滞积层段、丘状交错层理、包卷层理、浪成层理、倒“小”字状构造、生物扰动等。须二段的风暴沉积类似于鲍马序列,垂向沉积序列可以划分出Sa,Sb,Sc,Sd,Se等5段。风暴沉积是由风暴作用引起的强烈振荡风暴浪作用于三角洲、扇三角洲,使沉积物经搬运再沉积的产物。风暴岩沉积构造类型丰富多样,而又以风暴成因的泥砾为特征,泥砾的形态,排列样式,组合方式,反映了风暴沉积的强度和频度。须二段风暴沉积是四川盆地的一种新型储集层

关键词: 须家河组, 风暴岩, 沉积特征, 沉积模式

Abstract:

Storm deposits has been found for the first time in the 2nd member of Xujiahe Formation ( Upper Triassic) in western Sichuan Basin.Based on the micro-facies of cores,the main types of tempestite sedimentary characteristics have been identified, including gutter cast, scouring surface, truncated structure, storm lag deposit, hummocky cross-stratification,convoluted laminations, V-shaped structures generated by wave. A detailed study of sedimentary structures and petrological features of storm deposits has been made, such as individual laminates,thickness of storm deposit, and so on. The storm deposits are characterized by their lithologic features, and storm sedimentary sequence are related to storm activity and similar to the typical Bouma sequence.The sedimentary environment of tempestites is discussed,and the storm sedimentary model is explored.

Key words: Xujiahe Formation, tempestites, deposit characteristcs, sedimentary model

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